Code Division (cdma) Patents (Class 370/320)
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Patent number: 8243633Abstract: Parameters are defined for use on an interface (lub/lur) between network elements to enable configuration setup of an enhanced radio uplink (UL E-DCH). The basic Information Elements (IEs) are defined to support UL E-DCH functionality in the network on lub/lur. Particular parameters are shown for communication over the lub/lur interface between the RNCs and the Node Bs in order to be able to setup and re-configure the UL E-DCH channel. Flexibility is provided so as not to be restricted to any particular message or information element, but to be applicable to any selected message or messages in a given protocol.Type: GrantFiled: March 16, 2004Date of Patent: August 14, 2012Assignee: Nokia CorporationInventors: Woonhee Hwang, Karri Ranta-Aho
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Patent number: 8233868Abstract: A radio receiver device includes a radio signal processing section and a digital processing section. The radio signal processing section converts a received radio signal into a digital signal, demodulates the digital signal and detects a S/N ratio of the radio signal. The digital processing section digitally processes digital signals and switches over its operation mode based on the detected S/N ratio, thereby controlling a digital noise generated in the digital processing. The radio processing section checks whether the S/N ratio is lowered by a digital noise of the digital processing section or a shielding body external to the radio receiver device. The digital processing section switches over its operation mode to reduce the digital noise only when the cause of the fall of the S/N ratio is caused by the digital noise.Type: GrantFiled: August 12, 2008Date of Patent: July 31, 2012Assignee: DENSO CORPORATIONInventors: Kenichi Takagi, Katsuhiko Mutoh
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Patent number: 8228834Abstract: A relay for use in a communications network, the relay being arranged receive data from and transmit data to at least one user equipment, wherein the relay includes a processor arranged to process received configuration data from the user equipment and to transmit data to the user equipment in dependence of the processed ranging data.Type: GrantFiled: July 2, 2007Date of Patent: July 24, 2012Assignee: Nokia CorporationInventors: Shashikant Maheshwari, Yousuf Saifullah
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Patent number: 8223724Abstract: This invention is related to a system and method to setup a radio link in a CDMA mobile communication network. In particular, a radio network controller (RNC) sends a radio link setup request message, and a processing device receives the radio link setup request message. The processing device sends a radio link setup response message to the RNC, and the response is received the RNC and includes frame and chip offset information. In particular, frame and chip offset in a RNSAP Radio Link Setup Response message (after execution of UE involved relocation) is conveyed. A new SRNC will then include a random frame offset in the RNSAP Radio Link Setup Request message. The eHSPA Node B will ignore the random frame offset, and include the correct frame offset in the RNSAP Radio Link Setup Response message.Type: GrantFiled: October 31, 2008Date of Patent: July 17, 2012Assignee: Nokia Siemens Networks OyInventors: Tuomas Tapio Hakuli, Masatoshi Nakamata
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Patent number: 8223733Abstract: A mobile wireless communications system including a plurality of individual transponding nodes of various types, all in communication with a central processing hub. A local user signal is processed by the central processing hub and radiated through multiple paths to a plurality of the plurality of individual transponding platforms simultaneously. The signal is then re-radiated by each of the plurality of the plurality of individual transponding platforms to a mobile terminal that receives the re-radiated signal from the plurality of the plurality of individual transponding platforms coherently and in phase. The number of transponders and codes used to transmit each user signal can be readily adapted to user requirements.Type: GrantFiled: February 2, 2005Date of Patent: July 17, 2012Assignee: The DIRECTV Group, Inc.Inventors: Kar W. Yung, Frank A. Hagen, Donald C. D. Chang
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Patent number: 8223819Abstract: Systems and methods for generating spectrally shaped pseudo random noise sequences are described, which may include generating an L-level PN sequence, where L is an integer greater than 1; up-sampling the PN sequence by a factor of M, where M is an integer greater than 1; and filtering the up-sampled PN sequence using a finite impulse response (FIR) filter of length M, where the coefficients of the FIR filter are chosen from a set of pre-determined values.Type: GrantFiled: October 10, 2006Date of Patent: July 17, 2012Assignee: Realtek Semiconductor Corp.Inventors: Hong-Yean Hsieh, Chia-Liang Lin
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Patent number: 8224373Abstract: Briefly, in accordance with one or more embodiments, one or more interference over thermal noise (IoT) values may be measured for one or more frequency partitions or a sounding area, or combinations thereof, and a difference between a current IoT value and a previous IoT value may be evaluated. If the difference is greater than or equal to a reset threshold, the current IoT value is broadcast to a mobile station to reset the IoT value. Otherwise an IoT differential value is broadcast to the mobile station to update the IoT with the IoT differential value. The mobile station may then perform open loop power control based on the IoT value for uplink broadcast.Type: GrantFiled: July 27, 2010Date of Patent: July 17, 2012Assignee: Intel CorporationInventors: Rongzhen Yang, Hujun Yin
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Patent number: 8223887Abstract: A transmitter, a receiver, and a method of supporting a space time block code (STBC) scheme in a single carrier (SC) system based on a unique word (UW) are provided. The transmitter supporting an STBC scheme in an SC system based on a UW includes: a space time (ST) encoder encoding a plurality of symbols, which has been received according to a predetermined pattern, using a space time encoding; a first UW adder generating a first transmission sequence by inserting a first UW after a first symbol, from the encoded plurality of symbols; and a second UW adder generating a second transmission sequence by inserting a second UW after a second symbol, from the encoded plurality of symbols.Type: GrantFiled: July 10, 2007Date of Patent: July 17, 2012Assignees: Samsung Electronics Co., Ltd., Postech Academy-Industry FoundationInventors: Duck Dong Hwang, Chang Wook Ahn, Chang-Ho Choi, Gi Hong Lim, Jong-Bu Lim
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Patent number: 8224368Abstract: A technique of providing wireless network service utilizes an initial threshold to determine whether a signal received from a cellular device is of sufficient strength to warrant further processing. The technique may be implemented in a power controller of a base station, where the power controller includes an outer loop power control and an inner loop power control. The outer loop power control determines the strength of the received signal and compares it to an initial threshold. If the signal strength is below the initial threshold, the outer loop power control does not process the signal further. However, if the signal strength is above the initial threshold, the outer loop power control determines whether the signal contains any errors. If not, the signal is processed normally.Type: GrantFiled: September 27, 2004Date of Patent: July 17, 2012Assignee: Alcatel LucentInventor: Eric D. Leonard
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Patent number: 8218491Abstract: A data transmission method includes receiving information about a plurality of shared control channels, selecting at least one of the plurality of shared control channels using a User Equipment (UE) identity, receiving a message indicating the use of a shared data channel through the selected shared control channel, and receiving data through the shared data channel according to the message. When receiving a RRC message, such as a RRC connection setup message, transmitted through a shared data channel, a user equipment can decide a shared control channel to be monitored.Type: GrantFiled: January 9, 2008Date of Patent: July 10, 2012Assignee: LG Electronics Inc.Inventors: Young Dae Lee, Sung Duck Chun, Sung Jun Park, Seung June Yi
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Patent number: 8213390Abstract: Upon successful decoding of a first set of slots of a first data packet, an Access Network (AN) can send an acknowledge message (ACK) to an Access Terminal (AT) to indicate that the AN has successfully decoded the data received in the first set of slots of the first data packet. Upon unsuccessful decoding of the first set of slots of the first data packet, the AN can send a negative acknowledge message (NAK) to the AT to indicate that the AN has not successfully decoded the data received in the first set of slots of a first data packet. Based upon receipt of the NAK, the AT can resend the data by sending a second set of slots of the first data packet containing redundant data. Based upon receipt of the ACK, the AT can send a first set of slots of another packet.Type: GrantFiled: October 24, 2002Date of Patent: July 3, 2012Assignee: QUALCOMM IncorporatedInventors: Peter J. Black, Jun Ma, Eduardo Esteves, Christopher Gerard Lott
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Patent number: 8208862Abstract: A wireless system in which a pilot signal is transmitted in such a manner as to restrain error between the SIR of a data channel and that of the pilot signal, thereby improving wireless transmission quality. A specific pilot signal generator generates a specific pilot signal whose power and spreading ratio are identical with those of the data channel. A data channel generator receives propagation environment information and generates the data channel with a transmission format corresponding to the received propagation environment information. A wireless transmitter transmits the specific pilot signal and the data channel. On detecting the specific pilot signal, a propagation environment information notifier measures the SIR of the specific pilot signal, then generates propagation environment information corresponding to the measured SIR, and notifies the wireless transmitting unit of the generated information. A data channel receiver receives the data channel and processes the received data channel.Type: GrantFiled: July 17, 2007Date of Patent: June 26, 2012Assignee: Fujitsu LimitedInventors: Akira Ito, Masahiko Shimizu
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Patent number: 8208446Abstract: The invention concerns a method for performing a scheduling algorithm in a scheduler (120) of a wireless communication system, comprising the steps of obtaining from a communication unit (200) a minimum resource parameter, wherein said minimum resource parameter indicates a minimum of resources allocated to the communication unit in a scheduling frame to meet a resource constraint and scheduling allocation units for radio access to the communication unit in a scheduling frame in accordance with the minimum resource parameter.Type: GrantFiled: March 31, 2004Date of Patent: June 26, 2012Assignee: Panasonic CorporationInventors: Alexander Golitschek Edler Von Elbwart, Christian Wengerter
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Patent number: 8204023Abstract: A CQI reporting method for a Dual-Cell HSDPA service of a mobile communication system is provided for reducing CQI reporting overhead. A user terminal transmits channel quality indicators for downlink channels in a mobile communication system, measures channel qualities of a first downlink channel and a second downlink channel, compares the channel qualities of the first and second downlink channels with each other, selects at least one channel quality of the first and second downlink channels, and transmits at least one channel quality indicator indicating the at least one channel quality.Type: GrantFiled: August 11, 2009Date of Patent: June 19, 2012Assignee: Samsung Electronics Co., LtdInventors: Young Bum Kim, Youn H. Heo, Ju Ho Lee
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Methods and systems for implementing CDMA-based dedicated control channels in an OFDMA-based network
Patent number: 8203992Abstract: A method for efficiently transmitting control information may include allocating a portion of orthogonal frequency division multiple access (OFDMA) frames for transmission of a code division multiple access (CDMA) based signal. The CDMA-based signal may include data from one or more dedicated control channels. The method may also include converting the CDMA-based signal into a format that is suitable for transmission via OFDMA techniques. The method may also include transmitting the converted CDMA-based signal using a subset of available OFDMA subcarriers.Type: GrantFiled: September 17, 2008Date of Patent: June 19, 2012Assignee: Qualcomm IncorporatedInventors: Tom Chin, Kuo-Chun Lee -
Patent number: 8204024Abstract: A method is proposed for supporting downlink JD (joint detection) in a TDD CDMA communication network system, comprising steps of: judging whether the CAI (code allocation information) in a downlink timeslot will change in the next TTI (transmission time interval); if the CAI will change, inserting the changed CAI as a specific control information into a specified field in the traffic burst in the downlink timeslot corresponding to current TTI; sending the traffic burst containing the specific control information to each UE (user equipment) in the downlink timeslot via a downlink channel.Type: GrantFiled: November 4, 2004Date of Patent: June 19, 2012Assignee: ST-Ericsson SAInventors: Yueheng Li, Li Sun, Gang Wu
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Patent number: 8204147Abstract: For use in a wireless communication network, a mobile station configured to determine a preamble sequence from a set of indexed preamble sequences by generating an index of the preamble sequence from a B-bit message is provided. The mobile station is configured to group the B bits of the message into n groups, each group having a substantially equal number of bits. The mobile station is also configured to generate a parity bit from each of the n groups. The mobile station is further configured to determine the index of the preamble sequence based on the n parity bits. The mobile station is still further configured to transmit the preamble sequence corresponding to the index of the preamble sequence. A base station configured to recover the B-bit message using the received signal from the mobile station is also provided.Type: GrantFiled: May 19, 2010Date of Patent: June 19, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Kaushik Josiam, Zhouyue Pi, Ying Li, Hwasun Yoo
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Patent number: 8204161Abstract: A configurable all-digital coherent demodulator system for spread spectrum digital communications is disclosed herein. The demodulator system includes an extended and long code demodulator (ELCD) coupled to a traffic channel demodulator (TCD) and a parameter estimator (PE). The demodulator also includes a pilot assisted correction device (PACD) that is coupled to the PE and the TCD. The ELCD provides a code-demodulated signal to the TCD and the PE. In turn, the TCD provides a demodulated output data signal to the PE. The PACD corrects the phase error of the demodulated output data based on an error estimate that is fed forward from the PE. Accumulation operations in the ELCD, TCD, and PE are all programmable. Similarly, a phase delay in the PACD is also programmable to provide synchronization with the error estimate from the PE.Type: GrantFiled: February 19, 2010Date of Patent: June 19, 2012Assignee: Intel Mobile Communications GmbHInventor: Ravi Subramanian
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Patent number: 8200271Abstract: A radio station (100), transmits a continuous control signal and a discontinuous data signal simultaneously. It receives UP and DOWN power control commands and adjusts its transmit power by ? in response to the UP power control commands, increasing its transmit power by a power step, ? in response to the DOWN power control commands, decreasing its transmit power by a power step, ? in response to initiating transmission of the data signal, increasing the transmit power of the control signal, and ? in response to terminating transmission of the data signal, decreasing the transmit power of the control signal; In response to initiating or terminating transmission of the data signal, the radio station (100) temporarily modifies its response to the power control commands.Type: GrantFiled: December 19, 2006Date of Patent: June 12, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Matthew P. J. Baker, Timothy J. Moulsley
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Patent number: 8199027Abstract: The present disclosure is directed to systems and methods for utility meter reading. The present disclosure provides inexpensive, easy to install, devices that can collect and report utility usage data from a remote location automatically, or on-demand. The disclosed systems may be used to monitor up to sixty-four meters per system, wherein each of the sixty-four meters is monitored at least once per second. Methods for using the disclosed systems also are disclosed.Type: GrantFiled: November 17, 2009Date of Patent: June 12, 2012Inventor: Jack Rubin
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Patent number: 8199694Abstract: This invention discloses a method for switching SO (Service Option) to circuit data, including the following steps: step 1, a mobile station notifies a source BS (Base Station) and/or a target BS to switch SO to circuit data during a session; step 2, the source BS and/or the target BS negotiates with a mobile switching subsystem about switching SO to circuit data, and determines the bearer format parameters of the session through the negotiation; step 3, the source BS and/or the target BS makes a secondary service negotiation with the mobile station after the negotiation with the mobile switching subsystem succeeds; and step 4, after the negotiation with the mobile station succeeds, the source BS and/or the target BS conducts user interface service layer encapsulation on the circuit data according to a certain load format, and then transmits the encapsulated Real Time Transfer Protocol packets to the other BS.Type: GrantFiled: December 13, 2006Date of Patent: June 12, 2012Assignee: ZTE CorporationInventors: Zhihui Zhang, Bifeng Xie, Donghua Lu, Jian Cao, Wanchun Zhang
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Patent number: 8194620Abstract: The present invention discloses a method for terminals to switch among the reverse traffic channels in CDMA group call service. During the establishing procedure of the standard group call service, the originating call terminal sets the long code mask for the reverse dedicated traffic channel, establishes the reverse dedicated traffic channel and obtains the talk right to become the speaking terminal; the called terminal sets the long code mask for the reverse shared traffic channel, establishes the reverse shared traffic channel and becomes the listening terminal. After the speaking terminal successfully releases the talk right, it resets the long code mask of the reverse traffic channel as the long code mask of the reverse shared traffic channel and switches to the reverse shared traffic channel to become the listening terminal.Type: GrantFiled: February 4, 2008Date of Patent: June 5, 2012Assignee: ZTE CorporationInventor: Huiying Fang
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Patent number: 8195097Abstract: Systems and methodologies are described that facilitate broadcasting an interference level and adjusting transmit power corresponding to a reverse link in accordance with the interference level. An interference indication can be broadcasted on a broadcast channel in a wireless communication system. In response to the broadcast, mobile devices can adjust transmit power on the reverse link based upon considerations of the interference level. Further, mobile devices can evaluate an initial set point of a transmit power level during periods of inactivity.Type: GrantFiled: September 6, 2007Date of Patent: June 5, 2012Assignee: QUALCOMM IncorporatedInventors: Tingfang Ji, Rajat Prakash, Alexei Gorokhov, Mohammad J. Borran, Arumugam Chendamarai Kannan
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Patent number: 8194702Abstract: A transmission apparatus including: a layer multiplexing unit configured to assign, to a radio resource which is divided based on a time, a frequency and a layer, a bit sequence which constitutes at least one information source to be transmitted, in accordance with a communication state and a priority level of the information source; and a layer coding unit configured to perform a layer coding processing for the bit sequence assigned to the radio resource. The layer multiplexing unit performs the assignment so that a length of each bit sequence assigned to each radio resource becomes equivalent.Type: GrantFiled: November 23, 2007Date of Patent: June 5, 2012Assignee: NTT DoCoMo, Inc.Inventors: Noriyuki Maeda, Hiromasa Fujii, Shunji Miura, Hiromitsu Asakura
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Patent number: 8195739Abstract: A distributed computing system manages execution of jobs and their associated tasks. A broker manages assignment of computing tasks from clients to available computing resources. Clients and available computing resources contact the broker by polling. To prevent “ringing,” the broker specifies wait times for the polling entities, and randomizes the wait times in a range around a desired target latency. That is, a pseudo-random number generator is used to select values within a range of the target value, to avoid the situation in which deterministic patterns in the polling and response times result in highly synchronized message traffic, which might otherwise overwhelm the broker and/or the communication network.Type: GrantFiled: October 31, 2007Date of Patent: June 5, 2012Assignee: Tibco Software Inc.Inventors: James Bernardin, Peter Lee, James Lewis
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Patent number: 8189654Abstract: A receiver in which computation is simplified can be obtained by using a common factor for filter coefficients of FIR filters corresponding to a plurality of transmitting antennas and by using only the middle column of an inverse matrix of a gain matrix when the common factor is computed.Type: GrantFiled: March 29, 2007Date of Patent: May 29, 2012Assignee: NEC CorporationInventors: Allen Yuan, Holly He, Thanh Bui
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Patent number: 8189647Abstract: A method for generating a codebook to encode embedded information is described. A distribution pattern of symbols is determined. A first number of codewords associated with the distribution pattern of symbols is determined. A subset of codewords from the first number of codewords is selected. The subset of codewords is included in the codebook if the subset of codewords satisfies predetermined performance criteria.Type: GrantFiled: February 29, 2008Date of Patent: May 29, 2012Assignee: Sharp Laboratories of America, Inc.Inventor: Huaming Wu
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Patent number: 8190198Abstract: In one general aspect, the instant application describes a method for enabling dual-mode mobile devices to access a Code Division Multiple Access (“CDMA”) network. The method includes steps of receiving, from a first mobile device, a request to access a CDMA network, a first mobile device identifier identifying the first mobile device for the CDMA network access and a first integrated circuit card identifier identifying a first integrated circuit card being used by the first mobile device to access a Third Generation Partnership Project (“3GPP”) network; associating the first mobile device identifier with the first integrated circuit card identifier; and storing in a database the association between the first mobile device identifier and the first integrated circuit card identifier. The method further includes a step of authorizing the first mobile device to access the CDMA network only after associating the first mobile device identifier with the first integrated circuit card identifier.Type: GrantFiled: October 30, 2009Date of Patent: May 29, 2012Assignee: Cellco PartnershipInventor: Praveen Venkataramu
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Publication number: 20120127922Abstract: A airplane based communication and position finding method for receiving in a transceiver a OFDM signal from a mobile unit in an airplane. Demodulating and processing an OFDM received signal into a processed OFDM signal and processing and modulating the processed OFDM signal into a processed modulated signal. Transmitting in the airplane based transceiver the modulated signal to a satellite receiver. Receiving in the airplane based transceiver a second modulated signal from a satellite transmitter, demodulating and processing the second modulated signal into a processed second OFDM signal and modulating and transmitting said processed second OFDM signal to mobile unit. Method for processing an input voice signal, in a mobile unit, into a processed cross-correlated CDMA signal, modulating and transmitting cross-correlated CDMA signal into a modulated transmitted CDMA signal, used in a cellular system.Type: ApplicationFiled: January 16, 2012Publication date: May 24, 2012Inventor: Kamilo Feher
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Patent number: 8184609Abstract: The present disclosure relates generally to systems and methods for random access in a wireless communication system. In one example, the method includes allocating first and second random access orthogonal frequency subbands to first and second subdivisions, respectively, in a wireless communication network. The first subband is assigned to a first position in a first subframe for use in the first subdivision during a first transmission slot, and the second subband is assigned to a second position in the first subframe for use in the second subdivision during the first transmission slot. The first subband is then assigned to a third position in a second subframe for use in the first subdivision during a second transmission slot following the first transmission slot, and the second subband is assigned to a fourth position in the second subframe for use in the second subdivision during the second transmission slot.Type: GrantFiled: August 8, 2007Date of Patent: May 22, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Farooq Khan, Juho Lee
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Patent number: 8179834Abstract: A transmitting apparatus is provided for a base station capable of communicating with a plurality of mobile stations in a wireless network. The transmitting apparatus includes a beamforming traffic path for use in beamforming transmission to one of the mobile stations, and a diversity traffic path for use in diversity transmission to the mobile station. A selector is coupled to the beamforming traffic path and the diversity traffic path for dynamically selecting which of the traffic paths is used for transmission to the mobile station.Type: GrantFiled: November 19, 2004Date of Patent: May 15, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Cornelius van Rensburg, Joseph R. Cleveland
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Patent number: 8180354Abstract: A method for distributing wireless resource in multicarrier time division duplexing mobile communication system, such as TD-CDMA system, to overcome the shortage of 3GPP single carrier cell channel distribution technology of covering more lager area in composing cellular system, which contains using an area of covering same or almost same as a cell, selecting one carrier as main carrier and other carriers as auxiliary carrier, the frequency of main carrier is as different as possible, setting all public control channel in main carrier, the left resource of main carrier and resource of auxiliary carrier are used in uplink and downlink service channel, the arrangement of public channel in main carrier is same with that in single carrier cell.Type: GrantFiled: September 12, 2005Date of Patent: May 15, 2012Assignee: China Academy of Telecommunications TechnologyInventors: Feng Li, Shihe Li, Yusong He, Guiliang Yang
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Patent number: 8175574Abstract: Methods and systems for selecting one or more charging profiles for a mobile data service session are disclosed. A method includes identifying one or more available sources of charging profiles that each provide a charging profile for a mobile data service user and selecting a charging profile to be used for at least a portion of the mobile data service session based on selection criteria that ranks the available sources of charging profiles. Access is provided to the selected charging profile for use in billing the mobile data service user.Type: GrantFiled: April 28, 2006Date of Patent: May 8, 2012Assignee: Cisco Technology, Inc.Inventors: Biswaranjan Panda, Jayaraman Iyer, Weimin Ma
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Patent number: 8175027Abstract: A communication method in a gateway apparatus includes a transmission step of transmitting and receiving packets to and from a mobile station device, and transmitting and receiving packets to and from a home agent; and a setting step of establishing settings such that the packets from the mobile station device can be transmitted to at least a first and a second home agent, and the packets from at least the first and second home agents can be received.Type: GrantFiled: June 11, 2009Date of Patent: May 8, 2012Assignee: Fujitsu LimitedInventor: Yuji Tazaki
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Patent number: 8170158Abstract: Cross-polar interference cancellation in a dual-polarization system is described. A terminal in a satellite communication system may receive a first communication signal in a first polarization and a second communication signal in a second polarization substantially orthogonal to the first polarization. The terminal may correlate in-phase or quadrature components of the first communication signal with in-phase or quadrature components of the second communication signal to generate one or more correlation measurements. Correction terms may be generated, using the correlation measurements, to remove at least some of the cross-polar interference.Type: GrantFiled: September 30, 2008Date of Patent: May 1, 2012Assignee: ViaSat, Inc.Inventors: William H. Thesling, Richard T. Gedney, Matthew D. Nimon, Fan Mo
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Patent number: 8170599Abstract: Power control methods and apparatus taught herein advantageously provide quick convergence to the signal quality target needed to achieve a given data error rate target, when changes in transport format use by a given transport channel require such convergence. Specifically, the methods and apparatus maintain a “baseline” signal quality target that stays current with changing signal propagation conditions because it is common to all transport formats used by the transport channel. The methods and apparatus then bias this baseline signal quality target with a target offset particularized for the transport format in use. This offset may be selected from memory or dynamically calculated, and, regardless, can often be applied after a single transmission time interval.Type: GrantFiled: April 9, 2009Date of Patent: May 1, 2012Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Lennart Andersson, Tobias Junno, Torgny Palenius
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Patent number: 8165186Abstract: Techniques for deriving channel estimates with different channel estimation filters are described. In one scheme, a filter selection metric is determined for a signal to be recovered, a channel estimation filter is selected based on the filter selection metric, and a channel estimate is derived with the selected channel estimation filter. In another scheme, a first channel estimate is derived with a first channel estimation filter having a first filter response, a first signal is recovered with the first channel estimate, and interference due to the first signal is estimated and removed. A second channel estimate is derived with a second channel estimation filter having a second filter response that is different from the first filter response.Type: GrantFiled: July 24, 2006Date of Patent: April 24, 2012Assignee: Qualcomm IncorporatedInventors: Tao Luo, Aleksandar Damnjanovic, Durga Prasad Malladi
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Patent number: 8159996Abstract: The present invention relates to a control method for re-access after the terminal in the trunking system exits the group call, which includes the following steps: it is to maintain one message number for every group call for updating and send the message number to the terminal when the call is established, and the terminal retains the message number after accessing the call; the terminal sets the exit symbol as “unable to passively access” when it exits the call normally, and as “able to passively access” when it exits the call abnormally; after the terminal has received periodically transmitted paging message in its idle state, it judges whether the exit symbol of the corresponding group is the type of “able to passively access”, if yes, it accesses the call and then the procedure end; if the exit symbol is “unable to passively access”, then the terminal judges whether the message number retained in the group is the same as the message number in the paging message, if not, it accesses the call, otherwise diType: GrantFiled: November 25, 2005Date of Patent: April 17, 2012Assignee: ZTE CorporationInventors: Xuemin Liu, Huiying Fang
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Patent number: 8160119Abstract: A method of fighting interference in a frequency-hopping communication system is disclosed. The system has at least one main sensor and one or more auxiliary sensors. According to at least one embodiment, frequency-hopping signals are received. The frequency-hopping signals are arranged to include useful bands and one or more guard bands inserted between the useful bands, and a ratio of the useful bands to the guard bands being chosen according to a predetermined value of probability of interference interception. Signals of the inserted guard bands having a signal level greater than a predetermined threshold are selected. A set of spatial-filtering weightings are calculated according to a correlation matrix of noise plus jammers alone on the signals selected. Baseband signals of the received frequency-hopping signals are filtered by the set of the calculated spatial-filtering weightings.Type: GrantFiled: April 13, 2007Date of Patent: April 17, 2012Assignee: ThalesInventors: Pascal Chevalier, François Van De Wiele, Christophe Donnet
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Patent number: 8155017Abstract: A plurality of antennas transmit a first spread spectrum signal having an associated code. The first spread spectrum signal is received at the wireless user. For each received first spread spectrum signal, a second spread spectrum signal is transmitted having an associated code having a same phase as that received first spread spectrum signal. The second spread spectrum signals are received at the plurality of antennas. A distance measurement is determined between each antenna and the wireless user based on in part a received timing of the second signals. The wireless user's location is determined based on in part the distance determinations.Type: GrantFiled: May 19, 2008Date of Patent: April 10, 2012Assignee: InterDigital Technology CorporationInventors: Duane Ridgely Bolgiano, Gilbert E. LaVean
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Patent number: 8155170Abstract: A method and apparatus are disclosed for modulating a communication signal in a code division multiple access (CDMA) environment using orthogonal N by N Hadamard spread spectrum codes Orthogonal spreading codes are used that have lengths that are not a power-of 2 to provide additional channel variability for various multimedia applications and increase the flexibility of the number of channels/bandwidth relationship. The Hadamard codes are multiples of 4 (4n) and demonstrate a good cross-correlation property, making them very useful in the flexible design of code division multiple access (CDMA) systems. A transmitter encodes each of N data streams (N not being a power of 2), to be transmitted using a 4n codeword, Ni. The received signal is passed through a filter matched to the characteristics of the appropriate codeword, Ni, and PN spreading sequence.Type: GrantFiled: October 24, 2007Date of Patent: April 10, 2012Assignee: Alcatel LucentInventor: Zulfiquar Sayeed
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Patent number: 8149961Abstract: System and methods include transmitting the same signal in all sub-bands in different time intervals and processing the corresponding received signals to achieve a time resolution proportional to the inverse of the whole bandwidth as opposed to that of a single sub-band. The systems and methods refine the coarse resolution that is achieved by conventional approaches, such as the correlation method, in a single sub-band by aligning the outputs of the matched filters to the received signals from all sub-bands and applying a fast Fourier Transform (FFT) in each time bin along the sub-band index.Type: GrantFiled: August 4, 2004Date of Patent: April 3, 2012Assignee: Regents of the University of MinnesotaInventors: Ahmed H. Tewfik, Ebrahim Saberinia
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Patent number: 8144823Abstract: The present invention discloses a signal processing device and a signal processing method. The signal processing device includes a plurality of receiving devices, a storage module, a weighting module, and a processing module. Each of the receiving devices is capable of receiving an original signal stream, thus the plurality of receiving devices can generate a set of signal streams. The storage module is used for storing a plurality set of signal streams generated by the plurality of receiving devices. The weighting module can generate plurality sets of rotated signal streams according to a reference phase and the plurality sets of signal streams, and further generate a set of weighting signal according to the rotated signal streams. And, the processing module can generate a set of weighting signal streams according to the set of weighting signal and the plurality set of signal streams.Type: GrantFiled: January 28, 2009Date of Patent: March 27, 2012Assignee: Ralink Technology CorporationInventors: Yun-Shen Chang, Jiunn-Tsair Chen
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Patent number: 8144752Abstract: Disclosed is a receiver and a method for receiving a radio-electric navigation signal modulated by a carrier at a frequency fp, a sub-carrier at a frequency fsp and a pseudo-random code at a frequency fc, in which the radio-electric signal is converted into a two-way base band I, Q, characterized in that K modified pseudo-random codes, where K=?·fsp/fc, a being a predetermined integer, are generated locally by a modified code generator, each modified code having, during a time duration Tk where Tk=1/?·fsp, the shape of the pseudo-random code without the sub-carrier, and being offset in time by a duration Tk of the preceding modified pseudo-random code; in both ways, the signal is multiplied by the K modified codes and is phase- and quadrature-correlated by two phase and quadrature sub-carriers generated locally.Type: GrantFiled: December 12, 2007Date of Patent: March 27, 2012Assignee: Centre National d'Etudes SpatialesInventor: Antoine Richard de Latour
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Patent number: 8145206Abstract: A method for controlling uplink transmissions from a user device to an access point in a wireless telecommunications system is described. Each access point defines a communications cell, and the method comprises monitoring interference in an uplink channel at an access point, performing interference control actions at the access point when monitored interference exceeds a first predetermined level, monitoring occurrences of such control actions at the access point, and if a number of such occurrences exceeds a predetermined level, performing interference control actions with reference to a plurality of cells at a central controller of the telecommunications system, which central controller is operable to control a plurality of access points.Type: GrantFiled: November 2, 2005Date of Patent: March 27, 2012Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Muhammad Ali Kazmi, Gabor Fodor
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Patent number: 8139561Abstract: A method for a wireless Internet communication in a mobile communication terminal is provided. In an operation of starting a wireless Internet function, it is determined if a data call is being serviced and, if a data call is not serviced, the wireless Internet function is started by setting the wireless Internet function as a data call. In an operation of originating or terminating a voice call, it is determined if a wireless Internet function is being performed and, if the wireless Internet function is being performed, the wireless Internet function and a voice call service are substantially simultaneously started. Accordingly, in the wireless Internet communication method of the mobile communication terminal, a W-LAN function is set in the same manner as that in which a CDMA data call is set through modification of the SVD scheme, so that a W-LAN data protocol such as the DHCP (which can be used when the W-LAN function is set) and a voice call service can be provided at the same time.Type: GrantFiled: October 26, 2005Date of Patent: March 20, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Chang-Ki Jeong, Jeon-Man Park
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Patent number: 8135344Abstract: An electronic device having a communications module with a first set of data rates can be enabled to use the communications module to process signals received from a source that uses a second set of data rates. The device may generate packets, frames, etc. at the first set of data rates using the communications module from the signals received from the remote source by sampling signals at one or more of the first set of data rates. The device may then reconstruct data or payloads originally transmitted in the signals at the second set of data rates from the packets generated at the first set of data rates. Thus, the device can process signals or transmissions at the second set of data rates using the first set of data rates without requiring additional receivers or communications modules to process the signals.Type: GrantFiled: February 13, 2008Date of Patent: March 13, 2012Assignee: Apple Inc.Inventors: Scott Krueger, John Tang, Jesse Dorogusker
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Patent number: 8135017Abstract: The invention relates to a method and an arrangement for obtaining efficient radio resource allocation in a mobile communication network comprising a communication network entity (15) and at least one user equipment (18) transmitting data to said mobile communication network entity (15) over a radio interface. A first data transmission from said at least one user equipment (18) is received, whereby said first transmission is decoded and a message (ACK/NACK) based on a result of the decoding is sent on a downlink channel (13) comprising information of said first received data transmission. A second data transmission from said at least one user equipment (18) is received, whereby the power on said downlink channel (13) is adjusted depending on the result of said decoding and the content in said received second data transmission.Type: GrantFiled: December 1, 2005Date of Patent: March 13, 2012Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Eva Englund, Stefan Parkvall, Gunnar Bark, Ke Wang Helmersson, Mats Sågfors, Rong Hu
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Patent number: 8130696Abstract: An information signal is spread with a first spreading sequence producing a first spread signal for transmission over a first antenna. The information signal is spread with the first spreading sequence producing a second spread signal for transmission over a second antenna. The second antenna is not the first antenna. The relative position of the information signal and the first spreading sequence is different in the second spread signal than the first spread signal.Type: GrantFiled: April 20, 2005Date of Patent: March 6, 2012Assignee: InterDigital Technology CorporationInventors: D. Ridgely Bolgiano, Gilbert E. LaVean
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Patent number: RE43419Abstract: Method for improving a TFCI transportation performance, including the steps of (1) coding TFCI information bits to be transported through each radio frame, (2) repeating a TFCI code word produced by the coding for an arbitrary times, (3) applying puncturing patterns different from each other to the repeated code words produced as many as the repeated times, and puncturing the repeated code words at locations different from each other, and (4) dividing, inserting, and transporting the punctured fixed length repeated code words in each slot of the radio frame, whereby improving TFCI information transportation performance, and embodying the receiver side decoder to be identical to a case when a 32 bit code word are transported perfectly.Type: GrantFiled: August 3, 2010Date of Patent: May 29, 2012Assignee: LG Electronics Inc.Inventors: Sung Kwon Hong, Sung Lark Kwon, Young Woo Yun, Ki Jun Kim