-
公开(公告)号：AT365414T
公开(公告)日：2007-07-15
申请号：AT00928770
申请日：2000-05-01
Applicant: QUALCOMM INC
Inventor： HOLTZMAN JACK
Abstract: A method and corresponding apparatus separately estimates signal amplitude and noise in received signals, particularly symbols encoded using turbo codes. The method and apparatus, however, may be applied to such estimation in power control wireless systems (CDMA systems), other concatenated coding schemes, etc. A method and apparatus initially estimate the signal and noise, separately, in the received signal, such as by using curve fitting techniques. Thereafter, a finer estimate is provided by using the amplitude of received pilot symbols or using an estimate of the noise from the received pilot symbols.
-
公开(公告)号：DE69934700D1
公开(公告)日：2007-02-15
申请号：DE69934700
申请日：1999-09-10
Applicant: QUALCOMM INC
Inventor： REZAIIFAR RAMIN , HOLTZMAN JACK
Abstract: A method for allocating resources in a communication system having a plurality of base stations each serving multiple user stations, the method comprising: receiving, at a first base station, service requests from a plurality of user stations; dynamically allocating resources at the first base station including assigning a transmission rate for transmission of information between the first base station and each user station independently of allocation of resources by other base stations, based on a set of criteria including a set of requirements associated with each service request and interference generated by other base stations in the communication system, wherein the transmission rate assigned to each user station is determined to optimize a sum of all transmission rates assigned by the first base station to the plurality of user stations based on the set of requirements associated with each service request and wherein higher transmission rates are assigned to user stations which are relatively closer to the first base station; and transmitting rate assignment information from the first base station to the plurality of user stations.
-
公开(公告)号：AT350817T
公开(公告)日：2007-01-15
申请号：AT99968745
申请日：1999-09-10
Applicant: QUALCOMM INC
Inventor： REZAIIFAR RAMIN , HOLTZMAN JACK
Abstract: A method for allocating resources in a communication system having a plurality of base stations each serving multiple user stations, the method comprising: receiving, at a first base station, service requests from a plurality of user stations; dynamically allocating resources at the first base station including assigning a transmission rate for transmission of information between the first base station and each user station independently of allocation of resources by other base stations, based on a set of criteria including a set of requirements associated with each service request and interference generated by other base stations in the communication system, wherein the transmission rate assigned to each user station is determined to optimize a sum of all transmission rates assigned by the first base station to the plurality of user stations based on the set of requirements associated with each service request and wherein higher transmission rates are assigned to user stations which are relatively closer to the first base station; and transmitting rate assignment information from the first base station to the plurality of user stations.
-
公开(公告)号：BR0014394A
公开(公告)日：2006-03-01
申请号：BR0014394
申请日：2000-09-29
Applicant: QUALCOMM INC
Inventor： CHEN TAO , LING FUYUN , HOLTZMAN JACK , JOU YU-CHEUN , LUNDBY STEIN A
Abstract: A method and apparatus for wireless communications wherein a base station transmits a signal to sending data to a subscriber station through a signal beam that sweeps through the coverage area of the base station. User data addressed to the subscriber station is buffered until the signal beam angle of the signal beam allows efficient transmission. The base station may alter the beam sweep speed or the shape of the beam's radiation pattern over time to maximize system efficiency and capacity.
-
公开(公告)号：PT1201042E
公开(公告)日：2005-06-30
申请号：PT00948765
申请日：2000-07-18
Applicant: QUALCOMM INC
Inventor： HOLTZMAN JACK , WARRIER DILIP G
IPC: H04B1/7103 , H04B1/00 , H04B1/10 , H04B1/707 , H04B1/7107 , H04B7/26
Abstract: Several methods and corresponding apparatus reduce multiple access interference in code division multiple access communications systems (100) through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate.; This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.
-
Patent Agency Ranking
公开(公告)号：DK1201042T3
公开(公告)日：2005-06-20
申请号：DK00948765
申请日：2000-07-18
Applicant: QUALCOMM INC
Inventor： HOLTZMAN JACK , WARRIER DILIP G
IPC: H04B1/7103 , H04B1/00 , H04B1/10 , H04B1/707 , H04B1/7107 , H04B7/26
Abstract: Several methods and corresponding apparatus reduce multiple access interference in code division multiple access communications systems (100) through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate.; This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.
-
公开(公告)号：BR0208090A
公开(公告)日：2005-05-10
申请号：BR0208090
申请日：2002-03-15
Applicant: QUALCOMM INC
Inventor： CHEN TAO , HOLTZMAN JACK , LING FUNYUN , SANTS KEITH , SINDHUSHAYANA NAGABHUSHANA , WHEATLEY CHARLES E III
Abstract: 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 surplus/deficit indicative of the difference between the received signal quality and the setpoint and a threshold Eb/Nt needed for the desired level of performance, or a combination thereof. The metrics include one of a re-encoded power metric and a modified Yamamoto metric. The setpoint may be adjusted in different manners and/or by different amounts depending on the above-noted factors. The techniques may be employed for forward and/or reverse links in CDMA systems.
-
公开(公告)号：HK1053200A1
公开(公告)日：2003-10-10
申请号：HK03105315
申请日：2003-07-23
Applicant: QUALCOMM INC
Inventor： HOLTZMAN JACK , BAO GANG
Abstract: A method and apparatus for selecting a favored transmission slot for communicating non-voice data in conjunction with a voice-data communication. The slot, reflecting a favored power level and transmission rate for transmitting the non-voice data on a supplemental channel, is selected based upon the transmission power levels for voice-data transmitted by a base station to a remote station on a fundamental channel. The favored transmission slot is selected without the remote station messaging information to the base station concerning frequency channel or interference information for the supplemental channel. A method of performing forward-link scheduling in a wireless communication system includes determining the available base station power at the beginning of a frame, predicting the required transmit power at the beginning of the frame for each supplemental channel, determining rates sustainable with the predicted transmit power, dividing by throughput over a recent window to obtain a supplemental channel priority index, and allowing the supplemental channel with the highest priority index to transmit over the next frame.
-
公开(公告)号：HK1047832A1
公开(公告)日：2003-03-07
申请号：HK03100044
申请日：2003-01-03
Applicant: QUALCOMM INC
Inventor： HOLTZMAN JACK , WARRIER DILIP G
IPC: H04B1/7103 , H04B1/00 , H04B1/10 , H04B1/707 , H04B1/7107 , H04B7/26 , H04B
Abstract: Several methods and corresponding apparatus reduce multiple access interference in code division multiple access communications systems (100) through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate.; This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.
-
公开(公告)号：BR0109271A
公开(公告)日：2003-02-04
申请号：BR0109271
申请日：2001-03-15
Applicant: QUALCOMM INC
Inventor： HOLTZMAN JACK , BAO GANG
Abstract: A method and apparatus for selecting a favored transmission slot for communicating non-voice data in conjunction with a voice-data communication. The slot, reflecting a favored power level and transmission rate for transmitting the non-voice data on a supplemental channel, is selected based upon the transmission power levels for voice-data transmitted by a base station to a remote station on a fundamental channel. The favored transmission slot is selected without the remote station messaging information to the base station concerning frequency channel or interference information for the supplemental channel. A method of performing forward-link scheduling in a wireless communication system includes determining the available base station power at the beginning of a frame, predicting the required transmit power at the beginning of the frame for each supplemental channel, determining rates sustainable with the predicted transmit power, dividing by throughput over a recent window to obtain a supplemental channel priority index, and allowing the supplemental channel with the highest priority index to transmit over the next frame.
-
-
-
-
-
-
-
-
-
Search Results
101
records
(took 0.059 seconds)
