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Inventor:
Sindhushayana; Nagabhushana
Address:
San Diego, CA
No. of patents:
26
Patents:












Patent Number Title Of Patent Date Issued
8165619 Power allocation for power control bits in a cellular network April 24, 2012
A power allocation value for power control information transmitted from a first station to a plurality of stations is determined by receiving data rate control information from the plurality of stations in a communications system. Supplemental information relating to the data rate co
7953062 Enhanced channel interleaving for optimized data throughput May 31, 2011
In a transmission scheme wherein multi-slot packet transmissions to a remote station can be terminated by an acknowledgment signal from the remote station, code symbols can be efficiently packed over the multi-slot packet so that the remote station can easily decode the data payload
7881394 Method and apparatus for computing soft decision input metrics to a turbo decoder February 1, 2011
A method and apparatus for computing soft decision input metrics to a turbo decoder includes circuits associated with eight-ary phase shift keyed (8PSK) modulation and sixteen-ary quadrature amplitude modulation (16QAM). In both implementations log-likelihood ratio (LLR) metrics on c
7796563 Method and system for selecting a best serving sector in a CDMA data communication system September 14, 2010
An apparatus for selecting a best serving sector in a code division multiple access (CDMA) communication system. A comparator compares a plurality of signal levels received from a plurality of active sectors with a signal level of a current serving sector to produce a difference. A d
7702986 Rate-compatible LDPC codes April 20, 2010
Method and apparatus for generating codewords with variable length and redundancy from a single Low-Density Parity-Check (LDPC) code with variable length input words. A mother code for encoding data words is generated based on a parity-check matrix, wherein the mother code is adjuste
7693213 Method and apparatus for determining power required for data transmission in communication syste April 6, 2010
Methods and apparatus for estimating a transmission power required for data transmission in a communication system are disclosed. A terminal determines a quality metric of a communication link, over which data are to be transmitted, and modifies the determined quality metric by a qua
7643842 Method and apparatus for adjusting power control setpoint in a wireless communication system January 5, 2010
Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power s
7583744 Method and apparatus for computing soft decision input metrics to a turbo decoder September 1, 2009
A method and apparatus for computing soft decision input metrics to a turbo decoder includes circuits associated with eight-ary phase shift keyed (8PSK) modulation and sixteen-ary quadrature amplitude modulation (16QAM). In both implementations log-likelihood ratio (LLR) metrics on c
7564794 Method and an apparatus for a waveform quality measurement July 21, 2009
A method and an apparatus for waveform quality measurement are disclosed. An actual signal, representing a waveform channelized both in time and in code is generated by, e.g., an exemplary HDR communication system. Test equipment generates an ideal waveform corresponding to the actual
7433384 System and method for received signal prediction in wireless communications system October 7, 2008
Method and apparatus to compute the combiner coefficients for wireless communication systems for a space-time solution. One embodiment trains the weights on a signal known a priori that is time multiplexed with other signals, such as a pilot signal in a High Data Rate, HDR, system, w
7280562 Variable packet lengths for high packet data rate communications October 9, 2007
Method and apparatus for variable length Physical Layer (PL) packet generation. Multiple Security Layer (SL) packets may be multiplexed into a single PL packet to increase efficiency, wherein the SL packets may have variable lengths. In one embodiment, different format SL packets for
7209517 Method and apparatus for estimating a maximum rate of data and for estimating power required for April 24, 2007
Methods and apparatus for estimating maximum rate of data and for estimating a transmission power required for transmission of a data with a rate of data in a communication system are disclosed. A terminal determines a quality metric of a communication link, over which data are to be
7173974 Method and apparatus for computing soft decision input metrics to a turbo decoder February 6, 2007
A method and apparatus for computing soft decision input metrics to a turbo decoder includes circuits associated with eight-ary phase shift keyed (8PSK) modulation and sixteen-ary quadrature amplitude modulation (16QAM). In both implementations log-likelihood ratio (LLR) metrics on c
6990137 System and method for received signal prediction in wireless communications systems January 24, 2006
Method and apparatus to compute the combiner coefficients for wireless communication systems for a space-time solution. One embodiment trains the weights on a signal known a priori that is time multiplexed with other signals, such as a pilot signal in a High Data Rate, HDR, system, w
6987778 Enhanced channel interleaving for optimized data throughput January 17, 2006
In a transmission scheme wherein multi-slot packet transmissions to a remote station can be terminated by an acknowledgment signal from the remote station, code symbols can be efficiently packed over the multi-slot packet so that the remote station can easily decode the data payload
6950841 Logarithmic lookup tables September 27, 2005
In one embodiment, the invention is directed toward techniques for generating results in a logarithmic domain. The techniques may exploit properties of a logarithmic function to reduce the memory requirements needed to implement lookup tables. For example, the techniques may utilize
6950406 Method and apparatus for controlling transmission power in a potentially transmission gated or c September 27, 2005
A power control system for controlling the transmission power in a system wherein the transmission power may be gated or capped. The receiver employs a combination of closed loop and outer loop power control. The outer loop is frozen upon detection by the receiver that the signal has
6763244 Method and apparatus for adjusting power control setpoint in a wireless communication system July 13, 2004
Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power s
6748201 Gain control for communications device June 8, 2004
Systems and techniques for gain control include amplifying a signal with an amplifier having a gain represented by one of a plurality of gain curves depending on a value of a parameter, the signal being amplified at a first one of the parameter values, and controlling the gain of the amp
6725028 Receiving station with interference signal suppression April 20, 2004
An optimum combiner that reduces the amount of interference imposed upon a first base station by transmissions of other base stations within the same communication system. Two antennas are used to receive transmissions within a receiving station. A rake receiver is coupled to each antenn
6693920 Method and an apparatus for a waveform quality measurement February 17, 2004
A method and an apparatus for waveform quality measurement are disclosed. An actual signal, representing a waveform channelized both in time and in code is generated by, e.g., an exemplary HDR communication system. Test equipment generates an ideal waveform corresponding to the actual
6680925 Method and system for selecting a best serving sector in a CDMA data communication system January 20, 2004
In a disclosed embodiment, signal levels of the active sectors of an access terminal are compared with the signal level of the current serving sector of the access terminal. Next, a delta credit is accumulated. If a DRC lock bit is available, then an accumulated total credit is authorize
6594501 Systems and techniques for channel gain computations July 15, 2003
Systems and techniques for controlling transmission power involve receiving a first to second channel power ratio, receiving a first to second channel power ratio, adjusting the power ratio if a combined power of a plurality of channels exceeds a threshold, the channels including the fir
6594318 Method and apparatus for computing soft decision input metrics to a turbo decoder July 15, 2003
A method and apparatus for computing soft decision input metrics to a turbo decoder includes circuits associated with eight-ary phase shift keyed (8PSK) modulation and sixteen-ary quadrature amplitude modulation (16QAM). In both implementations log-likelihood ratio (LLR) metrics on code
6373823 Method and apparatus for controlling transmission power in a potentially transmission gated or c April 16, 2002
A power control system for controlling the transmission power in a system wherein the transmission power may be gated or capped. The receiver employs a combination of closed loop and outer loop power control. The outer loop is frozen upon detection by the receiver that the signal has
6285861 Receiving station with interference signal suppression September 4, 2001
An optimum combiner that reduces the amount of interference imposed upon a first base station by transmissions of other base stations within the same communication system. Two antennas are used to receive transmissions within a receiving station. A rake receiver is coupled to each antenn










 
 
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