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Cdma System patents

      

This page is updated frequently with new Cdma System-related patent applications.




 Subscriber-controlled registration technique in a cdma system patent thumbnailSubscriber-controlled registration technique in a cdma system
A method and apparatus for dynamic uplink communication in a wireless communication system are disclosed herein. The method includes receiving, by the mobile station, a first channel from a first base station, wherein the first channel includes an indication, wherein the indication has one of two states, wherein the base station transmits on forward link channels including a pilot channel, traffic channels and the first channel.
Ipr Licensing, Inc.


 Method and device for processing inter-system reselection or switch patent thumbnailMethod and device for processing inter-system reselection or switch
The present invention discloses a processing method and device for reselecting or switching ue from a td-scdma system to a td-lte system. The method includes: receiving, by a pgw, a modify bearer request message sent by an sgw; obtaining, by the pgw, an s5/s8 interface resource in current bearer context information, updating the bearer context information according to the modify bearer request message, and obtaining an s5/s8 interface resource in the updated bearer context information; when the pgw determines that the s5/s8 interface resource changes according to the s5/s8 interface resource in the updated bearer context information and the interface resource in the current bearer context information, sending back, by the pgw, a modify bearer response message carrying the s5/s8 interface resource in the updated bearer context information to the sgw, for enabling the sgw to update the bearer context information according to the modify bearer response message.
Datang Mobile Communications Equipment Co., Ltd


 Signaling for wireless communications patent thumbnailSignaling for wireless communications
A communication system, such as a wireless cdma system, detects markers with fewer errors by having field units transmit the markers at different power levels (e.g., 9 db for one marker and 11 db for another marker). The difference in power levels of the markers allows the base station to identify the request markers using alternative criteria with a low probability of error, where the alternative criteria may include comparing the markers to respective energy level thresholds, monitoring occupancy of time slots, occupancy of mutually exclusive code channels, or combinations thereof.

 Control signal aggregation in a multi-carrier wcdma system patent thumbnailControl signal aggregation in a multi-carrier wcdma system
Methods and apparatus are disclosed for transmitting data to a remote node via each of two or more transmitted carrier signals, wherein a distinct outbound packet data traffic channel is mapped to each transmitted carrier signal. In an exemplary method, aggregated control channel data is formed by combining control channel data corresponding to each of two or more received carrier signals, simultaneously transmitting traffic channel data to the remote node on each of the two or more outbound packet data traffic channels, and transmitting the aggregated control channel data using one or more physical control channels mapped to a first one of the transmitted carrier signals.
Telefonaktiebolaget L M Ericsson (publ)


 Interference suppression for cdma systems patent thumbnailInterference suppression for cdma systems
Interference is cancelled from a baseband signal by synthesizing interference from estimated symbols in interfering subchannels. The estimated symbols are hard-coded, soft weighted, or zeroed, depending on the value of an estimated pre-processed signal-to-interference-and-noise ratio (sinr) in each subchannel in order to maximize a postprocessed sinr.
Iii Holdings 1, Llc


 Multi-tiered detection of a geofence patent thumbnailMulti-tiered detection of a geofence
Methods, program products, and systems for multi-tier detection of a geofence are disclosed. In general, in one aspect, a mobile device can be configured to perform a task when the mobile device enters a geographic region.
Apple Inc.


 Signaling for wireless communications patent thumbnailSignaling for wireless communications
A communication system, such as a wireless cdma system, detects markers with fewer errors by having field units transmit the markers at different power levels (e.g., 9 db for one marker and 11 db for another marker). The difference in power levels of the markers allows the base station to identify the request markers using alternative criteria with a low probability of error, where the alternative criteria may include comparing the markers to respective energy level thresholds, monitoring occupancy of time slots, occupancy of mutually exclusive code channels, or combinations thereof.

 Maximizing data rate by adjusting codes and code rates patent thumbnailMaximizing data rate by adjusting codes and code rates
The present invention provides for making code rate adjustments and modulation type adjustments in a pseudonoise (pn) encoded cdma system. Coding rate adjustments may be made by changing the number of information bits per symbol, or forward error code (fec) coding rate.
Intel Corporation


 Discontinuous transmission cdma system patent thumbnailDiscontinuous transmission cdma system
A method of transmitting in a second mode at least one data frame from a first node to a second node. Determining if there is data to be transmitted and if there is no data to be transmitted then transmitting from said first node to said second node no frame in the second mode.
Core Wireless Licensing S.a.r.l.


 Random access channel preamble patent thumbnailRandom access channel preamble
One out of sixteen preamble signatures is selected. A code is produced based on the selected preamble signature.
Interdigital Technology Corporation


Power estimation for wireless communication devices in code division multiple access systems technical field

A wireless communication device for a cdma system is configured to generate power estimates with reduced estimation bias. The power estimates may be used for delay estimation, mmse channel estimation, demodulation, or other purposes.
Telefonaktiebolaget L M Ericsson (publ)

Methods for estimation and interference suppression for signal processing

A receiver in a cdma system comprises a front end processor that generates a combined signal per source. A symbol estimator processes the combined signal to produce symbol estimates.
Iii Holdings 1, Llc

Method for balancing the ratio eb/i in a service multiplexing cdma system and telecommunication systems using same

A communication apparatus for communicating data conveyed by a plurality of transport channels, the data of the transport channels being multiplexed into at least one multiplexing frame, includes a processing unit. The processing unit transforms an input data block of an initial size into an output data block of a final size in accordance with a rate matching ratio of the final size to the initial size, transmits information on a maximum payload of the at least one multiplexing frame the communication apparatus can send, receives a first parameter relative to the rate matching ratio, and calculates the final size, according to the initial size of the input data block, the first parameter, a second parameter and the maximum payload of the at least one multiplexing frame.
Mitsubishi Electric Corporation

Method and automatic gain control for td-scdma systems

A method and apparatus in wireless communications is provided. The method may include measuring received powers levels for a first window of samples, and computing a gain value based on the measured received powers levels.

Multi-detection of heartbeat to reduce error probability

A communications system improves performance of detecting a signal having an indication of a request to change communications states by making at least two positive identifications of the request in a given time frame. The system may further improve performance by applying a difference in power levels for a non-request state (i.e., steady state or ‘control hold’ state) versus a request state (i.e., ‘request to change’ state).

Methods and special burst transmissions to reduce uplink and downlink interference for td-scdma systems

A method and apparatus in wireless communications is provided. The method may include determining an occurrence of a special burst time slot, and obtaining one or more control symbols located in a first data field and a second data field of the special burst time slot..

Channel estimation method, channel estimation apparatus and communication device for cdma systems

The embodiment of the invention discloses a channel estimation method for a td-scdma system. The channel estimation method comprises steps of: obtaining a coarse channel estimation of a channel 1 of an intra-frequency cell set by a single cell channel estimation algorithm; performing an interference cancellation on the coarse channel estimation to obtain a channel estimation; determining a channel environment according to the channel estimation; and determining a stop strategy for the interference cancellation according to the channel environment and controlling performing the interference cancellation according to the stop strategy.

User equipment in a congestion controlled cdma system

A system for controlling congestion in a code division multiple access system with multi-user detection capabilities is disclosed. The system includes at least one user equipment, a base station, and a radio network controller.

Multi-tiered detection of a geofence

Methods, program products, and systems for multi-tier detection of a geofence are disclosed. In general, in one aspect, a mobile device can be configured to perform a task when the mobile device enters a geographic region.

Signal equalization with compensation for scrambling code correlation

A method for equalizing a received radio signal in a wcdma system, comprises receiving (210), in a radio receiver, of a digital radio signal spread by scrambling codes. A channel estimation is performed (230) on the received digital radio signal for a plurality of channels.

Channel estimation td-scdma

A channel estimation method for td-scdma system includes: sending midamble data to channel estimator and estimating the serving cell and adjacent cell channel response; calculating the interference cell number and setting the iteration number for interference cancelation; providing a channel response to a channel noise-suppression module that outputs a suppressed channel response; applying adaptive iterative interference cancelation. The invention solves the difficulty about the estimation of channel in multicell system, thus improving the estimation accuracy and the system capacity..

Subscriber-controlled registration technique in a cdma system

A method and apparatus for dynamic uplink communication in a wireless communication system are disclosed herein. The method includes transmitting, by a base station, a pilot signal on a first channel to a mobile station (ms), the pilot signal indicating a signal strength, receiving, by the ms, a one-bit indicator from a plurality of base stations on a second channel, the one-bit indicator indicating a congestion status for each of the plurality of base stations, determining, by the ms, the congestion status for each of the plurality of base stations, and selecting, by the ms, a base station based on the one-bit indicator received on the second channel, wherein the one-bit indicator further indicates a neighboring base station that is lightly congested..

Methods for estimation and interference suppression for signal processing

A receiver in a cdma system comprises a front end processor that generates a combined signal per source. A symbol estimator processes the combined signal to produce symbol estimates.

Supporting coordinated universal time in lte

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives a cdma system time from a sib.



Cdma System topics:
  • Cdma System
  • Code Division Multiple Access
  • Scrambling Code
  • Interference Cancellation
  • Base Station
  • Cell Reselection
  • Reselection
  • Communication System
  • Radio Signal
  • Over The Air
  • Pilot Signal
  • Carrier Signal
  • Allocation
  • Multiplexing
  • Time Division Multiplexing


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    This listing is a sample listing of patent applications related to Cdma System for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Cdma System with additional patents listed. Browse our RSS directory or Search for other possible listings.


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