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    METODO Y APARATO PARA DETECTAR UNA BANDA DE FRECUENCIA Y MODO DE OPERACION.
    12.
    发明专利
    METODO Y APARATO PARA DETECTAR UNA BANDA DE FRECUENCIA Y MODO DE OPERACION. 未知

    公开(公告)号：MX2010006319A

    公开(公告)日：2010-06-30

    申请号：MX2010006319

    申请日：2008-12-08

    Applicant: MOTOROLA INC

    Inventor： STORM BRIAN D ,  BUSH KEVIN J ,  CHANCE GREGORY W ,  BARR JOHN R

    IPC: H04B1/40 ,  H03J7/18 ,  H04W72/02

    Abstract: Se describe un método y aparato para detectar una banda de frecuencia y modo de operación que utiliza muestreo recursivo y reducción. El método comprende muestrear (215) mediante un dispositivo de comunicación inalámbrica de modo múltiple, un espectro de frecuencia operacional amplio en un primer índice de muestreo para producir un primer conjunto de muestras de señales discretas. De este modo, el dispositivo de comunicación inalámbrica compara (230, 240), por lo menos una de las gráficas de energía del primer conjunto de muestras de señales discretas con al menos una firma de protocolo específico para confirmar (245), si se encuentra una correlación aproximada. Cuando una o más correlaciones aproximadas se encuentran, el dispositivo de comunicación inalámbrica reduce (250) el espectro de frecuencia amplio en un conjunto reducido de bandas de frecuencia que corresponden con las firmas de protocolo específico correlacionadas. Entonces, las etapas de muestreo (215), comparación (230, 240), confirmación (245), y reducción (250) se siguieron recursivamente todavía en una banda de frecuencia y modo de operación se confirma.

    14.
    发明专利
    未知

    公开(公告)号：FR2760312A1

    公开(公告)日：1998-09-04

    申请号：FR9716353

    申请日：1997-12-23

    Applicant: MOTOROLA INC

    Inventor： CALLICOTTE MARK ,  STORM BRIAN D

    IPC: H04B7/26 ,  H04B1/16 ,  H04W52/02 ,  H04W52/42 ,  H04Q7/32

    Abstract: Prior to entry into a low-power sleep mode, a radiotelephone (104) in a radiotelephone system (100) calculates in advance the timing required to wake up selected portions of the radiotelephone and stores the calculated wakeup times in registers (216). Also prior to entry into sleep mode, local timing of the radiotelephone is synchronized to received PN roll boundaries from the radiotelephone system. In the sleep mode, the radiotelephone uses a sleep timer (210) to simulate system timing. When the sleep timer (210) matches the stored wakeup times, the radiotelephone re-activates the selected portions of the radiotelephone, such as an oscillator (116) and a radio frequency portion (109) of an analog front end (108), to exit the sleep mode and reacquire communication with the system. This also permits an early exit from sleep mode, for example to service an interrupt, while maintaining system timing.

    16.
    发明专利
    未知

    公开(公告)号：DE19806095A1

    公开(公告)日：1998-09-03

    申请号：DE19806095

    申请日：1998-02-14

    Applicant: MOTOROLA INC

    Inventor： STORM BRIAN D ,  LAROSA CHRISTOPHER PETER

    IPC: H03K5/00 ,  H04B1/16 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/7117 ,  H04B7/26 ,  H04L7/00 ,  H04Q7/20 ,  H04Q7/32 ,  H04J13/04 ,  H04B7/216 ,  G08C19/00

    Abstract: A searcher receiver (114) includes a sample buffer (202) which stores signal samples loaded using a real time clock. A real time linear sequence generator (RT LSG) (206) stores an initial state and is clocked using the real time clock. The contents of the RT LSG are loaded into a non-real time linear sequence generator (NRT LSG) (208) when sample processing begins Samples are correlated using a non-real time clock to allow signal processing to be uncoupled from the chip rate. The analog front end (108) may be powered down or tuned to another frequency during non-real time processing.

    METHOD OF AND APPARATUS FOR PILOT CHANNEL ACQUISITION
    19.
    发明专利
    METHOD OF AND APPARATUS FOR PILOT CHANNEL ACQUISITION 未知

    公开(公告)号：CA2212757A1

    公开(公告)日：1998-02-28

    申请号：CA2212757

    申请日：1997-08-12

    Applicant: MOTOROLA INC

    Inventor： STORM BRIAN D ,  KRAUSE DAVID J

    IPC: H04B1/7075 ,  H04B1/7077 ,  H04B1/7117 ,  H04B7/216 ,  H04W36/30 ,  H04W36/36 ,  H04W72/08 ,  H04B1/76 ,  H04Q7/38 ,  H04B1/69

    Abstract: A wireless communication device (100) acquires a pilot channel before an assigned slot when the wireless communication device is operating in the slotted mode of a CDMA system. The wireless communication device comprises a searcher receiver (107) that determines the short-term average pilot strength of active and neighbor pilot channels. Finger receivers (107) determine the long-term average pilot strength of the active and neighbor pilot channels. A logic and control circuit (113) assigns the finger receivers to the pilot channels according to their short-term average pilot strength, determines if the long-term average pilot strength of a neighbor channel is greater that the active pilot channel's pilot strength, and determines to hand off to the neighbor pilot channel with the greater long-term average pilot strength. Moreover, an early detection correlation length can be dynamically adjusted according to the pilot strength of the active pilot channel to shorten the pilot acquisition process.

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