公开(公告)号：AT554548T

公开(公告)日：2012-05-15

申请号：AT06015109

申请日：2003-03-04

Applicant: QUALCOMM INC

Inventor： SINDHUSHAYANA NAGABHUSHANA ,  BLACK PETER J ,  ATTAR RASHID A

IPC: H04J13/00 ,  H04L1/00 ,  H04B7/005 ,  H04B7/26 ,  H04L29/08 ,  H04W52/26

Abstract: 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 transmitted, and modifies the determined quality metric by a quality metric margin. The terminal then estimates the maximum rate of data in accordance with the modified quality metric. Alternatively, the terminal then estimates transmission power required for transmission of a data with a rate of data in accordance with the rate of data and the modified quality metric. The quality metric margin may be pre-determined or dynamically adjusted. The terminal dynamically adjusts the quality metric margin in accordance with a result of comparison of a transmit power corresponding to the estimated maximum rate of data with an actual transmit power used to transmit the data.

公开(公告)号：AT508561T

公开(公告)日：2011-05-15

申请号：AT01937333

申请日：2001-05-11

Applicant: QUALCOMM INC

Inventor： ESTEVES EDUARDO ,  ATTAR RASHID ,  SINDHUSHAYANA NAGABHUSHANA

IPC: H04L12/56 ,  H04W28/18

Abstract: In a high data rate communication system capable of variable rate transmission, an open loop rate control can be adjusted with a closed loop rate control to maximize throughput. An access point generates interleaved multi-slot packets that allow an access terminal to transmit indicator messages to the access point in accordance with recently received data carried within slots of the multi-slot packets.

公开(公告)号：BRPI0613602A2

公开(公告)日：2011-01-18

申请号：BRPI0613602

申请日：2006-07-19

Applicant: QUALCOMM INC

Inventor： ATTAR RASHID AHMED AKBAR ,  SINDHUSHAYANA NAGABHUSHANA

IPC: H04W28/22 ,  H04W28/16

Abstract: In one embodiment, the patent application comprises an apparatus, method and means for expanding DRC indices comprising assigning multiple DRC covers to at least one sector. In another embodiment, the apparatus, method and means for expanding DRC indices further comprises creating an expanded DRC indices list, sending a mapping of DRC covers to the expanded DRC indices list to an access terminal, and using the mapping to determine a sector and DRC index from the DRC indices list on requests for transmission from the access terminal.

公开(公告)号：AT439705T

公开(公告)日：2009-08-15

申请号：AT97945610

申请日：1997-11-06

Applicant: QUALCOMM INC

Inventor： VITERBI ANDREW ,  SINDHUSHAYANA NAGABHUSHANA

IPC: H03M13/00 ,  H03M13/39 ,  H03M13/41 ,  H04L1/00

Abstract: A soft decision output decoder (20) and decoding method. The decoder (20) decodes a sequence of signals output by an encoder (12) and transmitted over a channel (17). The soft decision output decoder (20) includes a first "generalized" Viterbi decoder (24) for decoding the sequence of signals received over the channel during a forward iteration through a trellis representing the encoder output having a block length T. The first "generalized" Viterbi encoder (24) begins at an initial state to and provides a plurality of forward iteration state metrics a for each state at each time interval over a window of length 2L, where L is on the order of a few constraint lengths and 2L is less than a block length T. A second "generalized" Viterbi decoder decodes the sequence of signals received over the channel (17) during a backward iteration through the trellis. The second decoder (26) starts at a second time t 2L and provides a plurality of backward iteration state metrics ² for each state at each time interval. A processor (28) then performs a dual maxima computation at each state using the forward state metric, the backward state metric and the branch metric for same to provide a measure of the likelihood that a particular sequence of data was transmitted by the encoder (12). By performing forward and backward Viterbi decoding with dual maxima computations at each node within a window moved over the trellis, the inventive decoder (20) provides the performance benefits associated with a LOG-MAP decoder while avoiding the excessive memory requirements of same.

公开(公告)号：AT428285T

公开(公告)日：2009-04-15

申请号：AT02801717

申请日：2002-10-15

Applicant: QUALCOMM INC

Inventor： WU QIANG ,  SINDHUSHAYANA NAGABHUSHANA ,  BLACK PETER ,  VIJAYAN RAJIV ,  ATTAR RASHID

IPC: H04J13/00 ,  H04W36/06 ,  H04B7/04 ,  H04B7/204 ,  H04B7/26 ,  H04L12/56 ,  H04Q1/00 ,  H04W16/24 ,  H04W24/00

Abstract: 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 delta generator is coupled to the comparator that generates a delta credit for each of the plurality of active sectors based on the difference. An accumulator is coupled to the delta generator and accumulates a plurality of delta credits to produce an accumulated total credit. A best sector identifier that is coupled to the accumulator identifies the best serving sector from the accumulated total credit.

公开(公告)号：DE60321898D1

公开(公告)日：2008-08-14

申请号：DE60321898

申请日：2003-03-26

Applicant: QUALCOMM INC

Inventor： BLACK PETER J ,  SINDHUSHAYANA NAGABHUSHANA ,  CHALLA RAGHU ,  SELTMANN KEVIN

IPC: H03G3/20 ,  H03G3/30 ,  H04B1/04 ,  H04B1/16 ,  H04B1/38 ,  H04B1/40

Abstract: 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 amplified signal from a predetermined gain curve relating to the gain curve of the amplifier for a second one of the parameter values by adjusting a gain control signal corresponding to a point on the predetermined gain curve as a function of the first one of the parameter values, and applying the adjusted gain control signal to the amplifier. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.

公开(公告)号：DE60320541D1

公开(公告)日：2008-06-05

申请号：DE60320541

申请日：2003-03-04

Applicant: QUALCOMM INC

Inventor： SINDHUSHAYANA NAGABHUSHANA ,  BLACK PETER J ,  ATTAR RASHID A

IPC: H04B7/005 ,  H04J13/00 ,  H04B7/26 ,  H04L1/00 ,  H04L29/08

Abstract: 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 transmitted, and modifies the determined quality metric by a quality metric margin. The terminal then estimates the maximum rate of data in accordance with the modified quality metric. Alternatively, the terminal then estimates transmission power required for transmission of a data with a rate of data in accordance with the rate of data and the modified quality metric. The quality metric margin may be pre-determined or dynamically adjusted. The terminal dynamically adjusts the quality metric margin in accordance with a result of comparison of a transmit power corresponding to the estimated maximum rate of data with an actual transmit power used to transmit the data.

公开(公告)号：AT369669T

公开(公告)日：2007-08-15

申请号：AT00982073

申请日：2000-10-31

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO ,  BLACK PETER ,  SINDHUSHAYANA NAGABHUSHANA

IPC: H04B7/26 ,  H04B1/707 ,  H04J13/00 ,  H04L7/04

Abstract: An apparatus for transmitting pilot references from a plurality of transmission sources, comprises a receiver for receiving, at each transmission source, one or more signals indicative of a time reference for the communication system. The apparatus generates, at each transmission source, a plurality of pilot bursts for a pilot reference; and transmits the plurality of pilot bursts in synchronization with the time reference from each transmission source.

公开(公告)号：AT362692T

公开(公告)日：2007-06-15

申请号：AT02756322

申请日：2002-06-25

Applicant: QUALCOMM INC

Inventor： ATTAR RASHID ,  VIJAYAN RAJIV ,  SINDHUSHAYANA NAGABHUSHANA

IPC: H04J13/00 ,  H04B7/005 ,  H04L1/20 ,  H04Q1/00 ,  H04W36/06 ,  H04W36/18 ,  H04W52/24 ,  H04W52/26

公开(公告)号：AU2002228969B2

公开(公告)日：2006-11-02

申请号：AU2002228969

申请日：2001-12-13

Applicant: QUALCOMM INC

Inventor： MONTOJO JUAN ,  BLACK PETER ,  SINDHUSHAYANA NAGABHUSHANA

IPC: H04L1/24 ,  H04B1/00 ,  H04B1/707 ,  H04B17/00

Abstract: 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 waveform. The test equipment then generates an estimate of offsets between parameters of the actual waveform and the ideal waveform, and the offsets are used to compensate the actual waveform. The test equipment then evaluates various waveform quality measurements utilizing the compensated actual waveform and the corresponding ideal waveform. Definitions of the various waveform quality measurements as well as conceptual and practical examples of processing of the actual waveform and the corresponding ideal waveform by the test equipment are disclosed. The disclosed method and apparatus may be extended to any waveform channelized both in time and in code regardless of the equipment that generated the waveform.