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公开(公告)号：NO20022233D0
公开(公告)日：2002-05-10
申请号：NO20022233
申请日：2002-05-10
Applicant: QUALCOMM INC
Inventor： CHEN TAO , LING FUNYUN , TIEDEMANN JR EDWARD G
Abstract: In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter.
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公开(公告)号：CA2389071A1
公开(公告)日：2001-05-17
申请号：CA2389071
申请日：2000-11-13
Applicant: QUALCOMM INC
Inventor： LING FUNYUN , TIEDEMANN EDWARD G JR , CHEN TAO
Abstract: In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by insertin g quality monitoring data into the signal at the transmitter.
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公开(公告)号：CA2380005A1
公开(公告)日：2001-02-15
申请号：CA2380005
申请日：2000-08-03
Applicant: QUALCOMM INC
Inventor： LING FUNYUN , BLACK PETER J
Abstract: The present invention is a novel and improved method and apparatus for performing closed loop power control. A method of implementing reverse link outer loop using only pilot signal is described. Such a method is especially useful when the data signals are only present in short burst such that packe t or frame error rates (PER or FER) cannot be estimated accurately. Moreover, since this method provides a mechanism for accurate set point adjustment eve n without a PER (FER) estimate, it can also be used to improve the accuracy of outer loop performance when such estimate becomes available. The present invention estimates a "pilot bit error rate" (PBER) (200), where each pilot "bit" consists of a number pilot chips distributed over a frame. In addition , it estimates the normalized variance of the signal energy (or C/I) (202) for each packet.
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公开(公告)号：DE60219605D1
公开(公告)日：2007-05-31
申请号：DE60219605
申请日：2002-03-22
Applicant: QUALCOMM INC
Inventor： LING FUNYUN , WALTON JAY R , HOWARD STEVEN J , WALLACE MARK , KETCHUM JOHN W
Abstract: Techniques for transmitting data from a transmitter unit to a receiver unit in a multiple-input mutiple-output (MIMO) communication system. In one method, at the receiver unit, a number of signals are received via a number of receive antennas, with the received signal from the transmitter unit. The received signals are processed to derive channel state information (CSI) indicative of characteristics of a number of transmission channels used for data transmission. The CSI is transmitted back to the transmitter unit. At the transmitter unit, the CSI from the receiver unit is received and data for transmission to the receiver units is processed based on the received CSI.
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公开(公告)号：BRPI0415575A
公开(公告)日：2007-01-02
申请号：BRPI0415575
申请日：2004-10-22
Applicant: QUALCOMM INC
Inventor： MURALI RAMASWAMY , LING FUNYUN , VIJAYAN RAJIV , WALKER KENT G , MANTRAVADI ASHOK , SUBRAMANIAM ANAND D
Abstract: A method of broadcasting data in a wireless broadcast network, comprising multiplexing data for a wide-area transmission onto a first transmission span, the wide-area transmission being sent from a plurality of transmitters in the network; multiplexing data for a local transmission onto a second transmission span, wherein the multiplexing is onto frequency subbands pseudo-randomly selected from among all usable frequency subbands and the local transmission being sent from a subset of the plurality of transmitters; selecting the first and second transmission spans based on an amount of data to broadcast for the wide-area transmission and an amount of data to broadcast for the local transmission; and broadcasting the local and wide-area transmissions via a wireless link, wherein the data for the wide-area transmission and the data for the local transmission are time division multiplexed (TDM) at each base station, and wherein the first and second transmission spans are first and second time segments, respectively, of a frame of a predetermined time duration as well as a corresponding system.
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Patent Agency Ranking
公开(公告)号：BR0208312A
公开(公告)日：2006-02-21
申请号：BR0208312
申请日：2002-03-22
Applicant: QUALCOMM INC
Inventor： LING FUNYUN , WALTON JAY R , HOWARD STEVEN J , WALLACE MARK , KETCHUM JOHN W
Abstract: Techniques for transmitting data from a transmitter unit to a receiver unit in a multiple-input mutiple-output (MIMO) communication system. In one method, at the receiver unit, a number of signals are received via a number of receive antennas, with the received signal from the transmitter unit. The received signals are processed to derive channel state information (CSI) indicative of characteristics of a number of transmission channels used for data transmission. The CSI is transmitted back to the transmitter unit. At the transmitter unit, the CSI from the receiver unit is received and data for transmission to the receiver units is processed based on the received CSI.
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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.
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公开(公告)号：AU779044B2
公开(公告)日：2005-01-06
申请号：AU1605001
申请日：2000-11-13
Applicant: QUALCOMM INC
Inventor： CHEN TAO , LING FUNYUN , TIEDEMANN EDWARD G JR
Abstract: In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter.
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公开(公告)号：NO20034052L
公开(公告)日：2003-11-12
申请号：NO20034052
申请日：2003-09-12
Applicant: QUALCOMM INC
Inventor： CHEN TAO , HOLTZMAN JACK M , LING FUNYUN , SAINTS KEITH W , SINDHUSHAYANA NAGABHUSHANA T , WHEATLEY III CHARLES E
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.
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公开(公告)号：NO20034052D0
公开(公告)日：2003-09-12
申请号：NO20034052
申请日：2003-09-12
Applicant: QUALCOMM INC
Inventor： CHEN TAO , HOLTZMAN JACK M , LING FUNYUN , SAINTS KEITH W , SINDHUSHAYANA NAGABHUSHANA T , WHEATLEY III CHARLES E
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.
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