公开(公告)号：BR9912991A

公开(公告)日：2002-01-22

申请号：BR9912991

申请日：1999-08-13

Applicant: QUALCOMM INC

Inventor： BUTLER BRIAN K ,  YU NICHOLAS K ,  EASTON KENNETH D

IPC: G06F1/08 ,  G06F1/32 ,  H03L7/00 ,  H04B1/16 ,  H04B7/26 ,  H04L7/02 ,  H04L7/033 ,  H04W52/02 ,  H04Q7/32 ,  G06F1/12

Abstract: A method and circuit for controlling a mobile station operating in a slotted paging environment. The circuit comprises a low power clock for generating a low frequency clock signal; a clock signal generator for generating a high frequency clock signal; a synchronization logic circuit for synchronizing the low frequency clock signal to the high frequency clock signal; a frequency error estimator for measuring an estimated low frequency clock error; and a sleep controller for removing power from the clock signal generator for the corrected sleep duration value, thereby conserving power between assigned paging slots. During the awake time, the low frequency clock signal is resynchronized to the high frequency clock, thereby correcting for any frequency error in the less accurate low power clock during sleep mode.

公开(公告)号：BR9912113A

公开(公告)日：2001-09-25

申请号：BR9912113

申请日：1999-07-15

Applicant: QUALCOMM INC

Inventor： EASTON KENNETH D ,  NEUFELD ARTHUR J

IPC: H04B7/26 ,  H04B1/7117 ,  H04W52/02 ,  H04Q7/32

公开(公告)号：HK1020503A1

公开(公告)日：2000-05-05

申请号：HK99104414

申请日：1999-10-07

Applicant: QUALCOMM INC

Inventor： EASTON KENNETH D ,  BLACK PETER J

IPC: H03H20060101 ,  H03H17/06

公开(公告)号：HK1015198A1

公开(公告)日：1999-10-08

申请号：HK98116185

申请日：1998-12-28

Applicant: QUALCOMM INC

Inventor： EASTON KENNETH D ,  LEVIN JEFFREY A

IPC: H04L1/02 ,  H04B1/707 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04L27/30 ,  H04Q7/20 ,  H04B

Abstract: An integrated search processor used in a modem for a spread spectrum communications system buffers receive samples and utilizes a time sliced transform processor operating on successive offsets from the buffer. The search processor autonomously steps through a search as configured by a microprocessor specified search parameter set, which can include the group of antennas to search over, the starting offset and width of the search window to search over, and the number of Walsh symbols to accumulate results at each offset. The search processor calculates the correlation energy at each offset, and presents a summary report of the best paths found in the search to use for demodulation element reassignment. This reduces the searching process related workload of the microprocessor and also reduces the modem costs by allowing a complete channel element modem circuit to be produced in a single IC.

公开(公告)号：AU707834B2

公开(公告)日：1999-07-22

申请号：AU6997798

申请日：1998-06-04

Applicant: QUALCOMM INC

Inventor： EASTON KENNETH D ,  LEVIN JEFFREY A

IPC: H04L1/02 ,  H04B1/707 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04L27/30 ,  H04Q7/20 ,  H04B1/69 ,  H04J13/02

Abstract: An integrated search processor used in a modem for a spread spectrum communications system buffers receive samples and utilizes a time sliced transform processor operating on successive offsets from the buffer. The search processor autonomously steps through a search as configured by a microprocessor specified search parameter set, which can include the group of antennas to search over, the starting offset and width of the search window to search over, and the number of Walsh symbols to accumulate results at each offset. The search processor calculates the correlation energy at each offset, and presents a summary report of the best paths found in the search to use for demodulation element reassignment. This reduces the searching process related workload of the microprocessor and also reduces the modem costs by allowing a complete channel element modem circuit to be produced in a single IC.

公开(公告)号：AU700715B2

公开(公告)日：1999-01-14

申请号：AU6477796

申请日：1996-06-18

Applicant: QUALCOMM INC

Inventor： EASTON KENNETH D

IPC: H04B1/7115 ,  H04B1/7117 ,  H04B7/26

Abstract: The present invention involves demodulating a signal in a spread spectrum multiple access system employing a pilot on the forward link. The rake receiver separates the signal processing based on the period over which the processing occurs. Symbol rate processing is performed by a single time-shared multiply-accumulate datapath that services multiple finger front ends and a searcher front end. The front ends are dedicated circuits that perform all chip rate processing, producing a data vector and asserting a flag indicating the results are ready to be serviced by the shared datapath. A datapath controller arbitrates use of the datapath between the finger front ends, the searcher front end, and combining functions, configuring the datapath to service them on a first-come, first-serve basis. The controller sequences the datapath through a fixed routine as dictated by the signal processing associated with the block being serviced.

公开(公告)号：ZA9705595B

公开(公告)日：1998-10-08

申请号：ZA9705595

申请日：1997-06-24

Applicant: QUALCOMM INC

Inventor： EASTON KENNETH D ,  BLACK PETER J

IPC: H03H17/06 ,  H03H ,  H01P ,  H04M

CPC classification number: H03H17/0607

公开(公告)号：MX9708514A

公开(公告)日：1998-02-28

申请号：MX9708514

申请日：1996-05-02

Applicant: QUALCOMM INC

Inventor： ZIV NOAM A ,  PADOVANI ROBERTO ,  LEVIN JEFFREY A ,  EASTON KENNETH D

IPC: H04L1/02 ,  H04B1/707 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04L27/30 ,  H04Q7/20 ,  H04B07/26 ,  H04B01/707

Abstract: Un procesador de busqueda integrado (128) utilizado en un modem (110) para un sistema de comunicacion de espectro difundido, separa en una memoria intermedia (172) muestras de señales recibidas y utiliza un procesador transformador de intervalo de tiempo (120) que opera en desplazamientos sucesivos a partir de la memoria intermedia (173). El procesador de busqueda (128) se acciona por etapas de manera autonoma a través de una busqueda segun se configuro por un conjunto de parámetros de busqueda específicos del microprocesador (136), el cual puede incluir el grupo de antenas para terminar la busqueda, el desplazamiento de inicio y la amplitud de la ventana de busqueda para terminar la busqueda y el numero de símbolos Walsh para acumular los resultados de cada desplazamiento. El procesador de busqueda (128) se calcula la energía de correlacion en cada desplazamiento y presenta un reporte sumario de la mejor trayectoria encontrada en la busqueda para utilizar la reinstalacion del elemento de demodulacion (122). La busqueda se hace de manera lineal independiente de la probabilidad de que una señal buscada haya sido transmitida en cualquier momento dado.

公开(公告)号：AU3500397A

公开(公告)日：1998-01-14

申请号：AU3500397

申请日：1997-06-23

Applicant: QUALCOMM INC

Inventor： EASTON KENNETH D ,  BLACK PETER J

IPC: H03H17/06

公开(公告)号：MX9604085A

公开(公告)日：1997-09-30

申请号：MX9604085

申请日：1996-01-16

Applicant: QUALCOMM INC

Inventor： LEVIN JEFFREY A ,  WERNER DAVID E ,  EASTON KENNETH D

IPC: H04B7/216 ,  H04B7/26 ,  H04L27/30 ,  H04W88/08

Abstract: Un procesador de demodulacion integrado, utilizado en un modem para un sistema de comunicaciones de espectro extendido, reduce o limita las señales de recepcion de trayectoria multiple y posteriormente utiliza un procesador de transformacion de tiempo fraccionado para procesar las señales multiples en una sola serie de resultados de decision flexible o suave. El procesador de demodulacion utiliza un solo dispositivo de transformacion que opera con base en fracciones de tiempo. Las salidas del dispositivo procesador salen en cascada a través de un procesador de cable coaxial que, con base en fracciones de tiempo, opera sobre las señales correspondientes a cada señal de recepcion de trayectoria multiple. Los resultados procesados se descodifican por máximos duales para proporcionar datos de decision flexible o suave.