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公开(公告)号：NO20011889L
公开(公告)日：2001-06-05
申请号：NO20011889
申请日：2001-04-17
Applicant: QUALCOMM INC
Inventor： SINDHUSHAYANA NAGABHUSHANA T , STEIN JEREMY , VIJAYAN RAJIV , LING FUYUN
Abstract: The present invention is a novel and improved technique for performing coding with particular application to turbo, or iterative, coding techniques. In accordance with one embodiment of the invention, interleaving is performed by generating the address of a memory using a PN state generator. Data is written into a memory in sequential order, and then read out using addresses specified by the PN state generator. To deinterleave, the interleaved data is written into a memory using addresses specified by the PN state generator, and then read out in sequential order. A set of PN state generators that provide excellent coding performance is provided.
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公开(公告)号：NO20011889A
公开(公告)日：2001-06-05
申请号：NO20011889
申请日：2001-04-17
Applicant: QUALCOMM INC
Inventor： SINDHUSHAYANA NAGABHUSHANA T , STEIN JEREMY , VIJAYAN RAJIV , LING FUYUN
CPC classification number: H03M13/2957 , H03M13/2742 , H03M13/2757 , H03M13/2764 , H03M13/2771 , H03M13/2789 , H04L1/0043 , H04L1/005 , H04L1/0052 , H04L1/0066
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公开(公告)号：CA2374282A1
公开(公告)日：2000-11-23
申请号：CA2374282
申请日：2000-05-10
Applicant: QUALCOMM INC
Inventor： LING FUYUN
IPC: H04B1/7085 , H04B1/7115 , H04B7/005 , H04L25/02 , H04Q7/38 , H04B1/707
Abstract: Apparatuses for a transmitter and a receiver (202) which enhance the performance of a system coherent demodulation by utilizing non-pilot sub- channels to enhance the accuracy of estimates of amplitude and phase noise inherent in the transmission channel. This enhancement is accomplished by utilizing the corrected received data on a fundamental channel to enhance a pilot channel estimate, which is subsequently utilized by a dot product modu le in demodulating a supplementary data channel.
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公开(公告)号：CA2371475A1
公开(公告)日：2000-11-23
申请号：CA2371475
申请日：2000-05-09
Applicant: QUALCOMM INC
Inventor： WHEATLEY CHARLES E III , HOLTZMAN JACK , LING FUYUN , TIEDEMANN EDWARD G JR , LEUNG GILBERT , CHEN TAO
Abstract: A method and apparatus for efficient candidate frequency search while initiating a handoff in a code division multiple access communication system . The method includes when the pilot signal is transmitted by the mobile stati on that is power controlled to a target receive level, the traffic channel powe r level is increased relative to the pilot channel to improve receiver performance. An improved feature is that the received pilot received at the base station stays the same while the receiver receives extra energy in the redundant traffic symbols received to enhance the probability of correctly decoding the received frame. The base station detects the absence of the mobile station transmitted signal from the frequency of interest. If the bas e station is aware of the starting time and duration of the absence, it can focus its detection during this predetermined time period. The performance c an be improved if the absence of the signal is spread across two frames at the frame boundary.
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公开(公告)号：CA2347237A1
公开(公告)日：2000-04-20
申请号：CA2347237
申请日：1999-10-12
Applicant: QUALCOMM INC
Inventor： STEIN JEREMY , SINDHUSHAYANA NAGABHUSHANA T , VIJAYAN RAJIV , LING FUYUN
Abstract: The present invention is a novel and improved technique for performing codin g with particular application to turbo, or iterative, coding techniques. In accordance with one embodiment of the invention, interleaving is performed b y generating the address of a memory using a PN state generator. Data is writt en into a memory (26) in sequential order, and then read out using addresses specified by the PN state generator. To deinterleave, the interleaved data i s written into a memory (16) using addresse specified by the PN state generato r. To de interleave, the interleaved data is written into a memory (26) using addresses specified by the PN state generator, and then read out in sequenti al order. A set of PN state generators that provide excellent coding performanc e is provided.
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Patent Agency Ranking
公开(公告)号：ES2745137T3
公开(公告)日：2020-02-27
申请号：ES02717372
申请日：2002-01-23
Applicant: QUALCOMM INC
Inventor： LING FUYUN , SINDHUSHAYANA NAGABHUSHANA , WALTON JAY , WALLACE MARK , FERNANDEZ IVAN
Abstract: Un procedimiento para preparar datos para transmisión en una pluralidad de canales de transmisión en un sistema de comunicación inalámbrica, en el que cada canal de transmisión es operativo para transmitir una secuencia respectiva de símbolos de modulación, comprendiendo el procedimiento: determinar (414, 434) un número de bits de información por símbolo de modulación admitidos por cada canal de transmisión; identificar (416, 436) un esquema de modulación para cada canal de transmisión de modo que se admita el número determinado de bits de información por símbolo de modulación; determinar una velocidad de codificación para cada canal de transmisión en base a al menos el número determinado de bits de información por símbolo de modulación y el esquema de modulación identificado para cada canal de transmisión, en el que al menos dos canales de transmisión están asociados con 15 diferentes velocidades de codificación; codificar (422, 442) una pluralidad de bits de información de acuerdo con un esquema de codificación particular para proporcionar una pluralidad de bits codificados, incluyendo la pluralidad de bits de información bits de información para transmisión en cada uno de los al menos dos canales de transmisión 20 y en el que los bits de información de los al menos dos canales de transmisión se codifican con el mismo esquema de codificación base y en el que la codificación se logra por medio de un código turbo que incluye dos códigos constituyentes operativos para proporcionar una primera y una segunda corrientes de bits de cola y paridad; intercalar por separado los bits de información, la primera corriente de bits de cola y paridad y la segunda corriente de bits de cola y paridad para obtener una corriente intercalada de bits de información, una primera corriente intercalada de bits de cola y paridad y una segunda corriente intercalada de bits de cola y paridad; y perforar (424, 446) la primera y la segunda corrientes intercaladas de bits de cola y paridad de acuerdo con un esquema de perforación particular para proporcionar un número de bits codificados no perforados para la pluralidad de canales de transmisión, en el que la perforación se realiza de modo que el número de bits de cola y paridad eliminados de la primera corriente intercalada de bits de cola y paridad es aproximadamente igual al número de bits de cola y paridad eliminados de la segunda corriente intercalada de bits de cola y paridad; y ajustar la perforación para lograr las diferentes velocidades de codificación para los al menos dos canales de transmisión.
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公开(公告)号：DK1374466T3
公开(公告)日：2019-08-26
申请号：DK02717372
申请日：2002-01-23
Applicant: QUALCOMM INC
Inventor： FERNANDEZ IVAN , LING FUYUN , SINDHUSHAYANA NAGABHUSHANA T , WALTON JAY R , WALLACE MARK
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公开(公告)号：BRPI0616427A2
公开(公告)日：2011-06-21
申请号：BRPI0616427
申请日：2006-09-26
Applicant: QUALCOMM INC
Inventor： MUKKAVILLI KRISHNA KIRAN , LING FUYUN , WALKER GORDON KENT
Abstract: Systems and methods are provided for determining position location information in a wireless network. In one embodiment, timing offset information is communicated between multiple transmitters and one or more receivers. Such information enables accurate position or location determinations to be made that account for timing differences throughout the network. In another embodiment, transmitter phase adjustments are made that advance or delay transmissions from the transmitters to account for potential timing differences at receivers. In yet another embodiment, combinations of timing offset communications and/or transmitter phase adjustments can be employed in the wireless network to facilitate position location determinations.
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公开(公告)号：BRPI0616425A2
公开(公告)日：2011-06-21
申请号：BRPI0616425
申请日：2006-09-26
Applicant: QUALCOMM INC
Inventor： LING FUYUN , WALKER GORDON KENT , MUKKAVILLI KRISHNA KIRAN
Abstract: Systems and methods are provided for determining position location information in a wireless network. In one embodiment, timing offset information is communicated between multiple transmitters and one or more receivers. Such information enables accurate position or location determinations to be made that account for timing differences throughout the network. In another embodiment, transmitter phase adjustments are made that advance or delay transmissions from the transmitters to account for potential timing differences at receivers. In yet another embodiment, combinations of timing offset communications and/or transmitter phase adjustments can be employed in the wireless network to facilitate position location determinations.
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公开(公告)号：CA2389071C
公开(公告)日：2010-04-13
申请号：CA2389071
申请日：2000-11-13
Applicant: QUALCOMM INC
Inventor： CHEN TAO , LING FUYUN , 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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