|| List of recent Multiple Input Multiple Output-related patents
| 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.
|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..
|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..
|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.
|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..
|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.
|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.
|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.
|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.
|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.
|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.
|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.
|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..
|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..
|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.
|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.
|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.
|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.
|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.
|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.
|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).
|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.
|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.. .
|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..
|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.
|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..
|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.
|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.
|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..
|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.
|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..
|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.
|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..
|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.. .
|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..
|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.
|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..
|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..
|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..
|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.
|Method and apparatus for user scheduling in multi-user multiple input multiple output (mimo) communication system|
A method and apparatus for user scheduling in a multi-user multiple input multiple output (mimo) communication system are provided. The method includes identifying a user group comprising user terminals.
|Methods and devices for estimating channel quality|
The invention relates to a method performed in a user equipment for estimating channel quality. The user equipment is adapted to operate in a multiple input multiple output (mimo) mode in a communication system comprising a base station node supporting mimo and serving the user equipment.
|Methods of transmitting coordinate multiple point data based on ortogonal covering codes|
The present invention relates to methods of transmitting coordinate multiple point data based on orthogonal covering codes. In an embodiment of the present invention, there is provided a method of transmitting downlink data in a base station of a multiple input multiple output system.
|Feedback method for virtual mimo transmission in wireless ad-hoc communication system|
A method for communicating between first multiple nodes and second multiple nodes in a wireless communication system is disclosed. The method includes the steps of performing a first local sharing procedure for a virtual mimo (multiple input multiple output) feedback among the second multiple nodes during a first predetermined time; performing feedback of channel status information from the second multiple nodes to the first multiple nodes during a integer multiple of a second predetermined time; and performing a second local sharing procedure for the virtual mimo feedback among the first multiple nodes during the first predetermined time..
|Codebook design method for multiple input multiple output system and method for using the codebook|
A multiple input multiple output (mimo) communication method using a codebook is provided. The mimo communication method may use one or more codebooks and the codebooks may change according to a transmission rank, a channel state of a user terminal, and/or a number of feedback bits.
|Higher order mu-mimo for lte-a|
An access node of a 3gpp lte-based wireless communication network comprises a transmitter portion that transmits downlink control information (dci) to at least one wireless station of a plurality of wireless stations wirelessly accessing the node as a multi-user multiple input multiple output (mu-mimo) wireless communication network. The dci comprises at least one code word indicating a rank of a channel matrix between the transmitter portion of the node and the wireless station greater than 4 and a spatial-related configuration for the wireless station.
|Method and apparatus for transmitting/receiving channels in mobile communication system supporting massive mimo|
A channel transmission/reception method and an apparatus for transmitting/receiving channels between a base station and a mobile terminal efficiently in a mobile communication supporting massive multiple input multiple output (mimo) transmission are provided. The method includes determining a resource to which a demodulation reference signal (dmrs) addressed to a terminal is mapped within a resource block, the dmrs resource being positioned in at least one of a first resource set capable of being allocated for dmrs and a second resource set symmetric with the first resource set on a time axis, and transmitting the dmrs and dmrs allocation information to the terminal..
|Apparatus and method for channel-state-information pilot design for an advanced wireless network|
A base station and mobile station communicate using a multiple input multiple output (mimo) communication. The base station includes a two dimensional (2d) antenna array comprising a number n of antenna elements configured in a 2d grid.
|Base station and mimo-ofdm communication method thereof|
When performing communication with a mobile station using mimo-ofdm communication, a base station uses multiple input multiple output (mimo) communication, which is multiple data stream transmission, to transmit data and pilot signals in a case where the communication environment of the mobile station is good, or uses single input multiple output (simo) communication, which is single data stream transmission, in a case where the communication environment of the mobile station is poor. When performing that simo communication, the base station performs control so that pilot signals from a specified cell that are used in channel estimation in single data stream transmission and pilot signals from adjacent cells that are used in channel estimation in single data stream transmission do not overlap in the frequency direction and/or time axis direction..
|Method and apparatus of link adaptation in wireless local area network|
A method of link adaptation performed by an access point supporting multi user(mu) multiple input multiple output(mimo) in wireless local area network system is provided. The method includes transmitting, to a first station, a physical layer convergence procedure (plcp) protocol data unit (ppdu) containing a modulation and coding scheme(mcs) request(mrq) and receiving, from the first station, a mcs feedback(mfb) in response to the mrq, wherein the first station is one of destination stations of mu-mimo transmission performed by the access point, and the mfb includes a recommended mcs value computed, by the first station, on the assumption that the first station, as a member of the destination stations, receives data transmitted over at least one spatial stream allocated to the first station in mu-mimo transmission..
|Methods and systems for conveying scheduling information of overlapping co-scheduled users in an ofdma-mu-mimo system|
A method implemented in a base station for conveying scheduling information in an orthogonal frequency division multiple access (ofdma) multi-user (mu)-multiple input multiple output (mimo) system is disclosed. The method includes transmitting to a first user equipment (ue) the scheduling information including first scheduling information of the first ue and at least a portion of second scheduling information of at least one second ue, wherein the scheduling information includes a resource block (rb) assigned to the first ue, the number of streams, and an indication of one or more dedicated reference symbol (rs) layers assigned to the first ue.
|Methods and apparatuses for facilitating uplink multiple input multiple output signaling|
A method, apparatus and computer program product are provided for detecting multiple input multiple output communications. A method and apparatus may enable transmission of a first control signal to a communication device.
|Mimo antenna calibration device, integrated circuit and method for compensating phase mismatch|
A multiple input multiple output (mimo) calibration device (360) for calibrating a phase relationship between at least two signals present on at least two radio frequency (rf) paths coupling a wireless communication unit and the mimo calibration device (360) is described. The mimo calibration device (360) is operably coupleable via at least two rf paths between a wireless communication unit and an antenna arrangement (219).
|Terminal including antenna|
Provided is a terminal including an antenna apparatus capable of securing a wideband characteristic in a multiple input multiple output (mimo) antenna system. The antenna apparatus may include a band pass filter for blocking or reducing interference from another antenna apparatus.
|Two-dimensional ue pairing in mimo systems|
A method and a radio base station are provided for selecting a first user equipment (ue) and at least a second ue from a plurality of ues, for sharing a transmission resource in the time-frequency dimension in a multiple input multiple output (mimo) transmission. A first and second imperfection of channel state information (csi) made available for the first ue and second ue, respectively is estimated (410, 420).
|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, scheduling of the uplink mimo transmissions may make a determination between single stream, rank=1 transmissions and dual stream, rank=2 transmissions based on various factors.
|Method of designing codebook for network multiple input multiple output communication system and method of using the codebook|
Provided herein is a method of designing a network codebook that may be shared by a plurality of base stations. Also provided herein is a feedback method of a terminal using the network codebook.
|Receiver adaptation based on acquired precoder knowledge|
A user equipment, ue, (14) and a radio network node (12) can perform multiple input multiple output, mimo, communication. The ue determines a precoder (50, 54) used in the radio network node for transmitting signals from multiple transmit antennas to the ue.
|Method and apparatus for processing uci and method for transmission thereof based on mimo system|
The present invention provides a method and apparatus for processing uplink control information (uci) and a method for transmitting the uci based on a multiple input multiple output system, which processing method comprises: repeating ack/nack source bits and/or rank indicator (ri) source bits in the uplink control information to form m groups, with each group corresponding to a code word (s302), wherein m is the total number of code words; carrying out channel encoding on the ack/nack source bits and/or ri source bits of each code word to obtain qack*li output bits (s304), wherein qack is the channel encoding output bits corresponding to each layer in a certain code word, l is the total number of layers, and the layer number corresponding to the i-th code word is li; and multiplexing and interleaving the output bits and the data bits of the corresponding code word (s306). The present invention solves the problems of transmission and channel encoding of the ack/nack and/or ri in the multiple input multiple output (mimo) system, and at the same time takes into account high load situations and backward compatibility..
|Method and device for feeding back downlink channel feedback information, and method and device for user pairing|
A method and device for feeding back downlink channel feedback information, and a method and device for user pairing. The method for feeding back downlink channel feedback information includes: calculating the multi-user channel quality indication error of a user, which error is used to reflect the difference in channel quality indication between the situation of multi-user multiple input multiple output transmission and the situation of single user multiple input multiple output transmission; adding the multi-user channel quality indication error into the downlink channel feedback information which includes a pre-coding matrix indication and a channel quality indication, and feeding the same back to a base station for scheduling.
|Distributed antenna system for mimo signals|
A distributed antenna system includes a master unit configured to receive at least one set of multiple input multiple output (mimo) channel signals from at least one signal source. The master unit is configured to frequency convert at least one of the mimo channel signals to a different frequency from an original frequency, and combine the mimo channel signals for transmission.
|Multiple input multiple output transmission method in a digital video broadcasting system and device for supporting same|
Provided is a multiple input multiple output (mimo) transmission method in a digital broadcasting system. The method includes generating a plurality of first modulation symbols by modulating first information bits; generating a plurality of second modulation symbols by modulating second information bits; generating a plurality of first pre-coded symbols and a plurality of second pre-coded symbols by pre-coding the plurality of first modulation symbols and the plurality of second modulation symbols; and allocating the plurality of first pre-coded symbols and the plurality of second pre-coded symbols staggeringly through a first antenna and a second antenna and transmitting them..
|Method and device for signal transmission in a multi-node system|
Provided are a method and apparatus for transmitting a signal of a multi-node system employing a plurality of nodes distributed geographically and a base station that can be controlled by being connected with each of the plurality of nodes. The method includes: mapping a plurality of codewords to a plurality of streams; mapping the plurality of streams to at least one node among the plurality of nodes; performing multiple input multiple output (mimo) precoding to map the streams mapped to the at least one node to at least one transmit antennas; and transmitting a signal subjected to the mimo precoding to a user equipment..
|Channel state information feedback apparatus and method in wireless communication system operating in fdd mode|
A channel state information (csi) feedback method and apparatus is provided for transmitting, at a base station, the csis for plural transmit antennas with a limited amount resource and receiving, at a mobile station, the csis efficiently in a massive multiple input multiple output (mimo) system operating in the frequency division duplex (fdd) mode.. .
|Method and system for extending multiple input multiple output wireless service|
Disclosed herein is a method and system for extending mimo service in a wireless communications system. The system comprises a base station, a remote system, and a host system communicatively coupled to the base station and the remote system.
|Adaptive time diversity and spatial diversity for ofdm|
An adaptable orthogonal frequency-division multiplexing system (ofdm) that uses a multiple input multiple output (mimo) to having ofdm signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to increase the data rate. Sub-carriers are classified for spatial diversity transmission or for time diversity transmission based on the result of a comparison between threshold values and at least one of three criteria.
|Method for transmitting and receiving wireless signal in wireless communication system and apparatus for the same|
A method for receiving a data frame by a receive station in a wireless local area network (wlan) system is provided. The method includes: receiving a signal a field including a multiple input multiple output (mimo) indicator and including a first signal a sub-field and a second signal a sub-field each transmitted as different orthogonal frequency division multiplexing (ofdm) symbols; determining a processing type of a subsequently transmitted signal based on the signal a field; receiving a data field; and obtaining data by interpreting the data field based on the processing type of the signal.
|Transmission of channel state information|
Signalling information relating to multiple input multiple output mimo channel state information characteristics that a user equipment ue determines to be highest priority for a downlink is transmitted uplink from a the ue to a node of a cellular wireless network. The ue receives an indicator from the node indicating a preferred basis of the highest priority signalling information.
|Method of reference signaling resource allocation for control channel transmission in wireless communication system|
In legacy systems such as 3rd generation partnership project (3gpp) releases 8 to 10, the control channel is transmitted using the first few orthogonal frequency division multiplexing (ofdm) symbols in a subframe. The limited control channel capacity will impact the system performance in future releases as more and more user equipments (ues) will be scheduled in a subframe with technologies such as mulituser-multiple input multiple output (mu-mimo) and coordinated multipoint (comp) transmission being enhanced or introduced.
|Method for transmitting channel quality information in a multiple input multiple output system|
A method is provided for transmitting channel quality information (cqi) in a mimo system. A method for allowing a receiver to feed back a cqi value to a transmitter in a multiple input multiple output (mimo) system includes receiving a transmission (tx) pilot signal for each tx antenna from a base station (bs), measuring a first cqi value of a first codeword and a second cqi value of a second codeword on the basis of the pilot signal, and transmitting the first cqi value of the first codeword and the second cqi value of the second codeword to the base station (bs), wherein at least one of the first and second cqi values includes specific information capable of indicating a transmission restriction status of a corresponding codeword..
|Group resource allocation techniques for ieee 802.16m|
Group resource allocation techniques for ieee 802.16m are generally presented. In this regard a method is introduced comprising generating a plurality of bitmaps to identify resource allocations and multiple input multiple output (mimo) modes for a group of broadband wireless mobile stations, wherein each mobile station in the group is assigned a position within a user bitmap to identify whether the mobile station is allocated frame resources and wherein the position within one or more mimo bitmap(s) to identify a mimo mode, and transmitting the bitmaps in a group resource allocation (gra) information element (ie) of a broadband wireless media access protocol (map) frame portion.