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Multiple Input Multiple Output patents



      
           
This page is updated frequently with new Multiple Input Multiple Output-related patent applications. Subscribe to the Multiple Input Multiple Output RSS feed to automatically get the update: related Multiple RSS feeds. RSS updates for this page: Multiple Input Multiple Output RSS RSS


Multiple input multiple output (mimo) based concurrent scan of neighbor cells

Multi-user multiple input multiple output wireless communications

Communication channel optimization systems and methods in multi-user communication systems

Date/App# patent app List of recent Multiple Input Multiple Output-related patents
08/21/14
20140233414
 Mu-mimo-ofdma methods and systems for signaling multi-rank cqis and precoders patent thumbnailMu-mimo-ofdma methods and systems for signaling multi-rank cqis and precoders
A method for determining attributes of communication channels of multi-user (mu)-multiple input multiple output (mimo) users in an orthogonal frequency division multiplexing based multiple access (ofdma) system is disclosed. The method comprises receiving from a base station, for at least one sub-band of contiguous sub-carriers, an indication of an estimate of or an upper-bound on a total number of streams that are co-scheduled by the base station on the at least one sub-band or an indication of a fraction of a transmit power at the base station that is applied to streams that are scheduled for transmission to a particular user, determining one or more signal quality measures for the at least one sub-band based on at least one of the fraction or the estimate of or the upper-bound on the total number of streams that are scheduled by the base station on the at least one sub-band, and transmitting to the base station an indication of the one or more signal quality measures.
08/14/14
20140228028
 Multiple input multiple output (mimo) based concurrent scan of neighbor cells patent thumbnailMultiple input multiple output (mimo) based concurrent scan of neighbor cells
Methods, systems, and devices are described for concurrently performing handoff-related measurements for neighbor cells using multiple input multiple output (mimo) antenna resources. In one example, a mobile device is in communication with a serving cell.
08/14/14
20140226745
 Multi-user multiple input multiple output wireless communications patent thumbnailMulti-user multiple input multiple output wireless communications
A method implemented in a user equipment used in a multi-user multiple input multiple output (mu-mimo) wireless communications system is disclosed. The method includes receiving from a base station an indication of a first modulation type for the user equipment, receiving a first data signal for the user equipment, receiving a second data signal for a co-scheduled user equipment, where a second modulation type for the co-scheduled user equipment is unknown to the user equipment, and deciding the second modulation type.
08/14/14
20140226744
 Communication channel optimization systems and methods in multi-user communication systems patent thumbnailCommunication channel optimization systems and methods in multi-user communication systems
Systems and methods of optimizing communication channels in multi-user communication systems are provided. Coding weights are determined based on communication channel state information for communication channels between a transmitter and multiple receivers.
08/14/14
20140226743
 Optimum interleaver design for a communication system patent thumbnailOptimum interleaver design for a communication system
In a method for determining interleaver parameters for a multiple input multiple output (mimo) communication system, maximum average distance for a plurality of adjacent spatial streams for a plurality of system configurations is determined. An interleaver parameter set for the plurality of system configurations is determined based on the determined maximum average distance..
08/14/14
20140226741
 Implementing multi user multiple input multiple output (mu mimo) base station using single-user (su) mimo co-located base stations patent thumbnailImplementing multi user multiple input multiple output (mu mimo) base station using single-user (su) mimo co-located base stations
A system that implements multi user multiple inputs multiple outputs (mu mimo) base station using a plurality of co-located single-user (su) mimo base stations is provided herein. The system may include a number n co-located single-user multiple input multiple output (su-mimo) bases stations each having a number k mimo rank, wherein said n co-located su-mimo base stations are configured to share a common antennas array, operating over a common frequency band ; a front-end mimo processor connected to said n co-located su-mimo base stations and further coupleable to said common antennas array; and a back-end coordinator configured to collaboratively assist in optimizing operation of said n co-located su-mimo base stations, such that said n co-located su-mimo base stations and said front-end mimo processor collaboratively implement a multi-user multiple input multiple output (mu-mimo) base station capable of dynamically separating a coverage area into n*k spatial channels..
08/14/14
20140226598
 Control channel transmitting method, base station and terminal patent thumbnailControl channel transmitting method, base station and terminal
A communication system, that includes a base station and a terminal, whereby the base station includes, a transmitting unit that transmits a control channel to the terminal with use of a control channel format selected from among a plurality of control channel formats, each including modulation scheme information, according to whether multiple input multiple output (mimo) transmission is applied or not, and wherein the terminal includes, a receiving unit that receives the control channel transmitted from the base station, wherein a number of bits indicating a modulation scheme included in a control channel format to be selected when the mimo transmission is applied is greater than that included in a control channel format to be selected when the mimo transmission is not applied.. .
08/07/14
20140219404
 Implementing blind tuning in hybrid mimo rf beamforming systems patent thumbnailImplementing blind tuning in hybrid mimo rf beamforming systems
A system and a method for applying a blind tuning process to m antennas coupled via n beamformers to a multiple input multiple output (mimo) receiving system having n channels, wherein m>n, are provided herein. The method includes the following steps: periodically measuring channel fading rate at a baseband level to determine the number of antennas l out of k antennas connected to each one of the beamformers, to be combined at each one of the n beamformers; assigning the antennas to the subset l according to some criteria such as best quality indicator; repeatedly applying a tuning process to l antennas in each one of the n beamformers..
08/07/14
20140219263
 Method for providing information of access point selection patent thumbnailMethod for providing information of access point selection
A method for providing information of access point (ap) selection in a wireless local area network (wlan) system, the method including receiving from candidate aps the ap selection information including channel correlation information for other stations associated with the candidate aps; and selecting one ap from candidate aps according to the channel correlation information corresponding to the candidate aps. Accordingly, a gain of multi-user multiple input multiple output (mimo) can be increased, and an ap suitable for a terminal can be selected..
08/07/14
20140219213
 Method and apparatus for transmitting downlink signal in a mimo wireless communication system patent thumbnailMethod and apparatus for transmitting downlink signal in a mimo wireless communication system
A method and apparatus for transmitting a downlink signal in a multiple input multiple output (mimo) wireless communication system is disclosed. A method for receiving a downlink signal from a base station to a user equipment in a multiple input multiple output (mimo) system, which supports dual layer transmission based on first and second antenna ports, comprises receiving downlink control information (dci) through a downlink control channel; and receiving downlink data through a downlink data channel, the downlink data including one or more of a first transport block and a second transport block, wherein the downlink control information includes a new data indicator (ndi) for each of the first and second transport blocks, and if the first transport block is disabled and the second transport block is enabled, the new data indicator for the first transport block indicates an antenna port through which the second transport block is received..
07/31/14
20140211873
Method and apparatus for reporting downlink channel state
A method of reporting a channel state to a base station supporting downlink multiple input multiple output (mimo) in a wireless communication system includes measuring a downlink channel based on a downlink signal received from the base station, and reporting a codebook index for precoding of the downlink signal according to the measurement of the downlink channel. In the case in which the ue receives channel state information (csi)-reference signal (rs) resources for n1 antenna ports, if a report for n2 (n1>n2) antenna ports is set, a codebook for the n2 antenna ports is configured as a subset of a codebook for the n1 antenna ports configured by the base station.
07/31/14
20140211707
Method and device for allocating group identifier
Embodiments of the present invention discloses a method and a device for allocating a group identifier, which can allocate a non-conflict gid to a non-ap sta in an area covered by multiple bss networks, so that the problem of gid conflict which is occurred when allocating the gid for the non-ap sta can be reduced. A method provided by the embodiment of the present invention includes: dividing all group identifiers (gids) into n parts according to number of the gids, and respectively allocating the n parts to n basic service set (bss) networks, which communicate in a multi user-multiple input multiple output (mu-mimo) mode, where the n bss networks have a common area, n is a natural number which is bigger than 1..
07/24/14
20140204855
Method of transmitting feedback message in wireless communication system
A method of transmitting a feedback message in wireless communication system is provided. The method includes selecting n best subbands of m subbands according to cqi, where both m and n are a natural number and m is larger than n, generating multiple input multiple output (mimo) information comprising n codebook indexes and n differential cqis and transmitting the feedback message comprising the mimo information..
07/24/14
20140204785
Communication apparatus and method of using massive multiple input multiple output
A communication apparatus and method using a massive multiple input multiple output (mimo) is disclosed, the method including measuring a transmission capacity between terminals disposed in a cell and a base station when a number of terminals disposed in the cell of the base station is greater than a number of terminals to be supported by the base station, and selecting at least one terminal for maximizing a network capacity from among terminals disposed in the cell based on the transmission capacity and the number of terminals to be supported by the base station.. .
07/17/14
20140198866
Wireless communication device
A wireless communication device communicates with, using a plurality of antennas, a communication partner device including a plurality of antennas. The wireless communication device includes a communication unit, an interference intensity judgment unit, and a determination unit.
07/17/14
20140198832
Multiple input multiple output antenna module and associated method
A multiple input multiple output (mimo) antenna module, comprising a first signal feed port coupled to a first antenna element disposed along a first edge of a pcb, a second signal feed port coupled to a second antenna element disposed on the pcb and a transceiver operable to be selectively coupled to either or both of the first and second signal feed ports. The first and second antenna elements form a plurality of antenna elements confined to a peripheral section surrounding a central region of the pcb of the mimo antenna module..
07/10/14
20140192918
Method and apparatus for reporting downlink channel state
A method of reporting a channel state to a base station supporting downlink multiple input multiple output in a wireless communication system includes measuring a downlink channel based on a downlink signal received from the base station, and reporting a codebook index for precoding of the downlink signal according to the measurement of the downlink channel. The codebook for precoding includes an improved codebook (hereinafter, referred to as an improved 4tx codebook) having a dual structure composed of a codebook for wideband and a codebook for subband, for 4 transmit (4tx) antenna ports, and the improved 4tx codebook includes sub-codebooks obtained by sub-sampling the codebook for subband according to priority..
06/26/14
20140177545
Time multiplexed channel state information reporting in a multi antenna wireless communication system
The embodiments herein relates to a method in a user equipment (305) for enabling a base station (301) to schedule the user equipment (305) in a wireless communication system (300). The wireless communication system (300) is in multiple input multiple output, mimo, mode and comprises four transmit antennas.
06/19/14
20140169491
Techniques to manage processing of multiple input multiple output communications
An apparatus may include a channel estimation component to determine a channel estimation matrix h for a tone of a multiplicity of tones in a multiple input multiple output (mimo) communications signal. The apparatus may further include a processor circuit coupled to the receiver component, and a flow selection component for execution on the processor circuit to calculate a figure of merit for power loss for the received tone based upon the channel estimation matrix, and based upon the calculated figure of merit, perform either a max-log calculation or a maximum likelihood calculation to determine a received signal metric, but not both calculations.
06/12/14
20140162670
Codebook for eight transmit antennas and multiple input multiple output communication system using the codebook
A transmitter and a receiver of a multiple input multiple output (mimo) communication system may use two codebooks to share channel information. When the transmitter uses eight transmit antennas, two codebooks may be defined.
06/12/14
20140161157
Interference and noise estimation in a multiple input multiple output (mimo) receiver
A receiver circuit receives a signal including a first reference signal from a first antenna port that is allocated to the ue. The receiver circuit includes a descrambling and despreading unit that despreads and descrambles the signal using a spreading code of the first antenna port and a scrambling sequence assigned to the ue to generate a first antenna port signal.
06/12/14
20140161109
Scheduler and scheduling method for transmitting data in mimo based wireless lan system
A scheduler and scheduling method that may select a data transmission time interval and a data transmitting station are included in a multi-user multiple input multiple output (mimo) communication system. An access point may include a receiver to receive channel measurement signals from stations using a plurality of receive antennas; a channel estimation unit to generate channel state matrices with respect to wireless channels formed from the stations to the receive antennas using the channel measurement signals; and a scheduler to select at least one transmitting station from the stations by considering the channel state matrices and a number of the receive antennas.
06/12/14
20140161053
Control channel in a high-speed packet access system
The proposed technology relates to a method for conveying information from a node to user equipment, ue, in a hspa, system. The method comprises the step of obtaining (s1) rank information and modulation information related to a four-branch multiple input multiple output, mimo, system.
06/05/14
20140155010
Successive interference cancellation (sic) ordering algorithms for improved multiple-input multiple-output (mimo) performance
Certain aspects of the present disclosure provide ordering techniques for a successive interference cancellation (sic) receiver which may be used to robustly choose a correct stream for first decode under varying data rates, snr and mobile propagation conditions in multiple input multiple output (mimo) systems. The sic ordering techniques discussed in the disclosure include snr and/or rate based information theoretic approach.
05/29/14
20140146777
Method and apparatus for power control of sounding reference signal (srs) transmission
Methods and apparatus for sounding reference signal (srs) power control for a wireless transmitter/receiver unit (wtru) are disclosed. These methods and apparatus include methods and apparatus for carrier-specific and carrier-common srs power control in wtrus that utilize carrier aggregation techniques.
05/22/14
20140141731
Antenna arrangement for 3g/4g svlte and mimo to enable thin narrow boardered display phones
A method and system provides a multiple input multiple output (mimo) antenna arrangement in a wireless communication device. A first antenna element and a second antenna element co-located within a same antenna volume are respectively coupled to first and second antenna feeds proximate to a base perimeter segment of a device chassis.
05/22/14
20140140425
Mimo communication system signal detection method
The present invention discloses a mimo communication system signal detection method applied to a mimo (multiple input multiple output) system with m transmitting antennas and n receiving antennas. The method comprises the following steps: acquiring the channel (from m transmitting antennas to n receiving antennas) matrix h by using a channel estimation algorithm; calculating a transmitted signal preliminary estimation vector [{circumflex over (x)}1, {circumflex over (x)}2, .
05/15/14
20140133591
Multiple input multiple output (mimo) transmitted signal vector estimation employing monte carlo sampling techniques
A method of determining a transmitted vector (x) in a mimo receiver includes the steps of receiving a received vector (y) representative of the transmitted vector (x), generating a first random number and forming, in a first iteration, a first symbol of a first candidate vector, the candidate vector representing a potential solution vector. The step of forming is based on a first approach if the first random number is greater than a first predetermined value (q), but is based on a second approach if the random number is less than or equal to the first predetermined value (q).
05/15/14
20140133317
Adaptive transmission mode switching
A node (28) of a radio access network (20) communicates over a radio interface (32) with a wireless terminal (30). The node (28) comprises a transmitter (34) and a controller (40).
05/08/14
20140126666
Exploiting spatial degrees of freedom in multiple input multiple output (mimo) radio systems
Methods and apparatuses, including computer program products, are provided for determining the null-space for a channel between a transmitter and an unintended receiver. In one aspect there is provided a method.
05/08/14
20140126509
Method for transmitting and receiving data unit based on uplink multiple user multiple input multiple output transmission and apparatus for the same
In an aspect, a method of receiving a data unit, performed by an access point (ap), in a wireless lan (wlan) system is provided. The method includes transmitting a signal protection frame, the signal protection frame comprising a group id field indicating a multiple input multiple output (mimo) transmission sta group including a first station (sta) and a second sta; and, a spatial stream field indicating a number of spatial streams allocated to each of member stas included in the mimo transmission sta group; receiving a first preamble for a first data unit from the first sta; receiving a second preamble for a second data unit from the second sta; and simultaneously receiving the first data unit from the first sta and the second data unit from the second sta..
04/17/14
20140105091
Method for power saving in wireless local area network and apparatus for the same
A method of power saving in a wireless local area network is provided. The method is performed by a wireless device that acquires txop (transmission opportunity) from an access point (ap), and the txop indicates an interval of time when the ap has the right to transmit at least one data block for multi user-multiple input multiple output (mu-mimo) transmission.
04/03/14
20140092862
Method for transmitting reference signals in a downlink multiple input multiple output system
In a system having a plurality of cells participating in a coordinated multi-point (comp) operation, a method for transmitting reference signals (rss) to user equipment (ue) includes generating, by base station (bs) included in each of the plurality of cells, a subframe including rss for a ue located in the each of the plurality of cells, and transmitting the generated subframe to the ue by the bs. The rss include rss for channel measurement, and rss for data demodulation, the plurality of cells are grouped according to frequency shift values applied to the rss for channel measurement and rs allocation patterns are determined for two cells among the plurality of cells according to a predetermined rule..
03/27/14
20140086131
Method for transmitting and receiving physical layer convergence procedure protocol data unit in wireless local area network system supporting power save mode operation and apparatus for the same
A method of transmitting a data frame in a wireless local area network (wlan) is provided. The method includes transmitting, by an access point (ap), a scheduling information element including information on a time period for data frame transmission to a first station (sta) and a second sta, wherein the scheduling information element includes an offset field indicating a start time point of the time period and transmitting, by the ap, the data frame to the first sta and the second sta by using a multi user-multiple input multiple output (mu-mimo) transmission scheme after the start time point indicated by the offset field..
03/20/14
20140078982
Channel quality reporting in a wireless communication system
In one aspect, a method performed by a user equipment, ue, in a wireless telecommunication system is provided. The ue is configured in multiple input multiple output, mimo, mode with four transmit antennas.
03/20/14
20140078959
Base station, user equipment and methods therein
Embodiments herein relate to a method in a base station (12) for providing feedback to a user equipment (14) for transmissions of a secondary stream out of a primary and a secondary stream of the user equipment (14) in an uplink multiple input multiple output mode. The base station (12) transmits to the user equipment (14), a preferred transmission rank and an offset for the secondary stream in a channel, wherein the offset is to be used by the user equipment (14) when deciding transport block size of the secondary stream and the preferred transmission rank is to be used by the user equipment (14) when deciding a transmission rank..
03/20/14
20140078010
Multiple input multiple output (mimo) antennas having polarization and angle diversity and related wireless communications devices
Antenna systems are provided including a chassi and first and second radiating elements coupled to the chassi. The first radiating element is configured to amplify excitation of the chassi and the second radiating element is configured to reduce excitation of the chassi so as to reduce mutual coupling in the antenna system.
03/13/14
20140073352
Method for precise location determination
According to embodiments, methods are presented to for determining precise location of a device by exchanging a plurality of messages with one or more devices (e.g., access points or mobile devices) in vicinity. Embodiments may calculate distance between the devices using round trip time that takes to transmit and receive signals to/from each of the devices.
03/13/14
20140072068
Enhanced performance multi-user multiple input output (mu-mimo) radio links
Technology is described for enhancing performance of multi-user multiple input multiple output (mu-mimo) radio links. A system can include a scrambling module to scramble coded bits in codewords to be transmitted in a transmission.
03/13/14
20140071869
Dynamic power scaling of digital modems
A system and method dynamically scale power consumed by the circuitry of an electronic device based on channel state and/or data rate. The electronic device then operates according to the power scaling.
03/06/14
20140064416
Methods and apparatus for generating demodulation candidates using vector candidate sampling (vcs)
Certain aspects of the present disclosure relate to techniques for generating likely demodulation candidates using vector candidate sampling (vcs). Vcs is used to generate high likelihood candidates for multiple input multiple output (mimo) demodulation that approaches optimal maximum a posteriori (map) performance with reasonable complexity.
03/06/14
20140064189
User equipment, base station and methods related to multiple input multiple output
It is presented a method for controlling multiple input multiple output, mimo, pilot channel boosting. The method is performed in a user equipment, ue, capable of mimo transmissions using a primary and a secondary stream.
02/27/14
20140056373
Communication system, communication device, and reception device
A communication system including a transmission device having a plurality of transmission antennas that transmit a plurality of signals under a multiple input multiple output (mimo) scheme; and a reception device having a plurality of reception antennas that receive the plurality of signals under the mimo scheme. The transmission device is configured to add a preamble signal to a transmission signal transmitted to the reception device at an earliest timing among transmission signals that are modulated under an orthogonal frequency division multiplexing (ofdm) scheme, the transmission signals being output from the transmission antennas.
02/27/14
20140056236
Methods and devices for uplink mimo operation
In a radio system configured for uplink multiple input multiple output, mimo, operation, methods and devices are provided that transmits an indicator signal indicating whether the ue has scheduled data for transmission on a secondary stream. The indicator signal is transmitted on an e-dch dedicated physical control channel, e-dpcch, associated with a primary stream..
02/13/14
20140044205
Method of transmitting and receiving mimo feedback information in wireless communication system, mobile station and base station
A method of transmitting an mimo (multiple input multiple output) feedback information, which is transmitted by a mobile station in a wireless communication system, is disclosed. The present invention includes sending a ranging request message to a base station and receiving a ranging response message from the base station in response to the ranging request message, wherein the mobile station comprises a fixed m2m (machine to machine) device and wherein the ranging request message contains the mimo feedback information..
02/13/14
20140044089
Multi-user multiple input multiple output radio communications
A radio communications system conducts radio communications using basic physical channels. Each basic physical channel defines a time slot and a radio frequency for transmission.
02/06/14
20140038661
Power loading in mu-mimo
Embodiments of a system and method for transmitting data from an access point in a multiple user multiple input multiple output (mu-mimo) system are provided. A first indication of signal quality (isq) is received at the access point from a first station and a second isq is received from a second station.
02/06/14
20140038585
Multiple input multiple output user equipment radio frequency assistant system
A user equipment and a wireless radio frequency assistant in a communication system that supports multiple input multiple output. The wireless radio frequency assistant and the user equipment operate together as a single system.
02/06/14
20140037019
System and method for uplink multiple input multiple output transmission
Methods and apparatuses are provided for uplink mimo transmissions in a wireless communication system. In some particular aspects, an e-tfc selection process for selecting a transport format combination for an uplink mimo transmission may take certain steps in the case that a ue is power- or buffer-limited.
02/06/14
20140036967
System and method for uplink multiple input multiple output transmission
Methods and apparatuses are provided for uplink mimo transmissions in a wireless communication system. In some particular aspects, an uplink mimo transmission (e.g., a rank 2 transmission) may be established, wherein a primary stream transport block size (tbs) is determined in accordance with a received scheduling grant, and a modulation scheme for the transmission is determined in accordance with the tbs.
02/06/14
20140036727
Routing method and apparatus for setting optimum multi-hop hybrid v-mimo transmission path for wireless ad hoc network
The present invention relates to a method for setting the optimum transmission path for increasing energy efficiency in a wireless ad hoc network. More particularly, the present invention relates to setting an optimized data transmission path in a multi-hop data transmission environment in a wireless network comprising machine to machine (m2m) communication devices, which operate with limited energy, based on link information of the network, such as the position of a node in the network.
01/16/14
20140016687
Apparatus for performing channel equalization on a mimo signal
The present invention relates to a receiver in a 2×2 line of sight multiple input multiple output, los mimo, system. The receiver is arranged to estimate a first (Ŝ1) and a second (Ŝ2) signal on the basis of a first (r1(t)) and a second (r2(t)) signal received from respective first and second transmitters (tx1,tx2).
01/09/14
20140011508
Method and apparatus for determining number of antennas in multiple input multiple output (mimo) communication system
A method of determining a number of antennas, includes calculating a power used by a transmitting device. The method further includes calculating a channel capacity of the transmitting device.
01/09/14
20140010322
Distortion-aware multiple input multiple output precoding
Precoding parameters used for precoding of a source are selected to minimize distortion that would otherwise be induced in the source during encoding and transmission of the source over a multiple input multiple output (mimo) channel.. .
01/09/14
20140010080
Method for operating a wireless network, a wireless network and a device
Method for operating a wireless network, wherein at least one mimo (multiple input multiple output) group of different stations will be constructed by a grouping algorithm based on a grouping metric for providing a mimo group of different stations addressable simultaneously in space by a base station using mimo techniques and meeting a definable level of performance quality, the grouping metric being based on an sinr (signal-to-interference and noise ratio) experienced by each station within the mimo group. The method includes: computing an snr (signal-to-noise ratio) that a new station would experience without any interference when added to an existing mimo group; computing an sinr estimate by correcting the snr with the sum of spatial correlations between the new and each of the stations already present in the existing mimo group; and using the sinr estimate for deciding whether the new station can be added to the existing mimo group..
12/26/13
20130345832
Interactive control of multiple input multiple output control structures
Exemplary embodiments allow users to interactively formulate and solve multivariable feedback control problems. For example, users can solve problems where a plurality of control elements are distributed over one or more feedback loops and need to be jointly tuned to optimize overall performance and robustness of a control system.
12/26/13
20130343303
Communication method and apparatus using beamforming in a wireless communication system
A communication method and an apparatus using beamforming in a wireless communication system are provided. The communication method includes determining a candidate user set including one or more mobile stations (mss), for multiple user-multiple input multiple output (mu-mimo) transmission, transmitting beam information indicating best base station (bs) transmission beams of the mss of the candidate user set to the mss of the candidate user set, receiving precoding matrix index (pmi) information indicating a pmi to be used for baseband precoding from each of the mss of the candidate user set, the pmi information being determined based on the beam information, and transmitting a signal precoded based on the pmi information to at least one ms..
12/19/13
20130336415
Multiple input multiple output transceiver
An exemplary mimo transceiver includes a first transmitting channel and a second transmitting channel. The first transmitting channel includes a first power amplifier and a first transmission line which are connected together in series.
12/19/13
20130336242
Apparatus and methods for flexible rf configuratoin in multi-antenna wireless systems
An apparatus includes a baseband signal processing block, processing circuitry, and at least one radio frequency (rf) communication module communicably coupled to the baseband signal processing block and configured to communicate using a selected mode of communication in a channel. The processing circuitry is configured to detect a sub-channel band of unavailable spectrum within the channel, the band of unavailable spectrum being less than a whole of the channel.
12/19/13
20130336233
Method and apparatus for opportunistic user scheduling of two-cell multiple user mimo
An apparatus and a method for opportunistic user scheduling of two-cell multiple user multiple input multiple output (mimo) by a base station, the method comprising: broadcasting signals through random beams to users; and receiving channel quality information (cqi) from best k user set. The cqi is calculated based on all possible combinations of transmit beamforming vectors..
12/19/13
20130336215
Explicit feedback format within single user, multiple user, multiple access, and/or mimo wireless communications
Explicit feedback format within single user, multiple user, multiple access, and/or mimo wireless communications. A beamformer provides a first communication to a beamformee, and based thereon, the beamformee may ascertain certain characteristics associated with the type and format of feedback to be provided to the beamformee via a second communication from the beamformee to the beamformer.
12/12/13
20130329626
Method for transmitting and receiving packet for multi user in wireless local area network and apparatus for the same
A method of receiving a multi-user packet by a receiver in a wireless local area network system. The method includes: receiving a first group identifier (id) management request message from a transmitter, wherein the group id management request message includes information about at least one group id which is intended to be allocated to the receiver for multi user-multiple input multiple output (mu-mimo) transmission, and the information about the at least one group id indicates each group id and a spatial stream set position for the each group id; transmitting a first group id management response message to the transmitter, wherein the group id management response message indicates admission or adjustment for allocation of the at least one group id; and receiving at least one multi-user packet from the transmitter, wherein the multi-user packet is transmitted using mu-mimo transmission..
12/12/13
20130329139
Cellular video, wi-fi and spread spectrum system and method
A modulated video signal, received from a satellite, in a transceiver of a ship and of other water based communication devices, is demodulated and processed in a processor into a baseband processed video signal. The baseband video signal is processed and modulated into a gaussian minimum shift keyed (gmsk) or a code division multiple access (cdma) or a orthogonal division multiple access (ofdm) modulated video signal.
12/05/13
20130322509
Implementing blind tuning in hybrid mimo rf beamforming systems
A system and a method for applying a blind tuning process to m antennas coupled via n beamformers to a multiple input multiple output (mimo) receiving system having n channels, wherein m>n, are provided herein. The method includes the following steps: periodically measuring channel fading rate at a baseband level to determine the number of antennas l out of k antennas connected to each one of the beamformers, to be combined at each one of the n beamformers; assigning the antennas to the subset l according to some criteria such as best quality indicator; repeatedly applying a tuning process to l antennas in each one of the n beamformers..
12/05/13
20130322229
Apparatus and method for transmitting and receiving of cyclic shift parameter for supporting orthogonality in mimo environment
A method includes: determining a cyclic shift (cs) parameter that implicitly indicates an orthogonality allocation rule and orthogonality-related information, by determining a multiple access state of a user equipment (ue), and transmitting the determined cs parameter to the ue, wherein the orthogonality-related information includes an orthogonal cover code indicated by the cs parameter, the orthogonality allocation rule is determined as a uniform scheme or a non-uniform scheme according to the cs parameter, determining the cs parameter by which the non-uniform scheme is applied if the ue is in a single user multiple input multiple output state, and determining the cs parameter by which the uniform scheme is applied if the ue is in a multiple user multiple input multiple output state.. .
11/14/13
20130301596
Method for suppressing interference of terminal in multiple input multiple output wireless communication system and apparatus therefor
Disclosed is a method for enabling a terminal to process a signal in a wireless communication system. Specifically, the method for enabling a terminal to process a signal in the wireless communication system includes the steps of: estimating a recommended transmission beamforming vector and a prior received filtering vector; calculating an effective channel for an adjacent cell by applying the prior received filtering vector to a signal received from the adjacent cell; estimating a constraint beamforming vector for the adjacent cell on the basis of the effective channel; transmitting the information of the transmission beamforming vector and the constraint beamforming vector to the serving cell; receiving adaptive response signals of the transmission beamforming vector and the constraint beamforming vector and the constraint beamforming vector; and receiving the signal to which the transmission beamforming vector is applied, from the serving cell by applying the prior received filtered vector..
11/14/13
20130301551
Multi-user multiple input multiple output communications in wireless local area networks and wireless transmit and receive units
Wtrus, access points (aps) and methods thereon are disclosed. A method on a wtru may include receiving a message from an ap that comprises a beamformee capability element; sending a second message to the ap that comprises a beamformer capability element; and receiving, from the ap, a third message in response to the second message that indicates a group to which the wtru is assigned.
11/14/13
20130301463
Method and apparatus for transmitting management information frame in wireless local area network system
A method and of transmitting management information, performed by an access point (ap), in a wireless local area network system is provided. The method includes transmitting, to a station, a frame including a bss load information element, the bss load element including a multi user (mu) multiple input multiple output (mimo) capable sta count field and a plurality of bandwidth utilization fields, wherein the mu-mimo capable sta count field indicates a total number of stas with mu reception capability currently associated with a candidate bss managed by the ap and the plurality of bandwidth untilization fields indicate whether a plurality of operating channel width are busy..
11/14/13
20130301454
Communication method and apparatus using analog and digital hybrid beamforming
A communication method and apparatus using analog and digital hybrid beamforming are provided. The method includes receiving a first message including a measurement and selection condition for hybrid beamforming from a base station (bs), measuring channels of a plurality of bs transmission beams, selecting at least one bs transmission beam based on channel measurements, transmitting report information about the selected at least one bs transmission beam to the bs, receiving from the bs a second message, estimating an effective channel matrix for the selected final bs transmission beam according to the measurement and report condition, determining feedback information for digital beamforming of the bs based on the effective channel matrix, transmitting the determined feedback information to the bs, and receiving a data burst from the bs according to a multiple input multiple output (mimo) mode and/or a configuration scheduled based on the feedback information..
11/07/13
20130294536
Precoded pilot transmission for multi-user and single user mimo communications
The disclosed method and apparatus include an wtru-specific reference signal scheme that provides efficient precoded pilot transmission and effective channel estimation using dedicated pilot signals. The disclosed methods are efficient for both a single user (su) and a multi user (mu) multiple input multiple output (mimo) system..
11/07/13
20130294533
Method and system for communicating feedback information in a multiple user multiple input multiple output (mu-mimo) communication system
A method and system for communicating feedback information in a multiple user multiple input multiple output (mu-mimo) communication system are presented. In one aspect of the method and system, a beamformer station may communicate a feedback information request to a plurality of beamformee stations.


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Multiple Input Multiple Output topics: Multiple Input Multiple Output, Communication System, Base Station, Access Point, Modulation, Pilot Signal, Scheduling, Demodulation, Channel Estimation, Communications, Computer Program, Beamforming, User Group, Channel Status, Allocation

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