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    41.
    发明专利
    未知

    公开(公告)号：FI107089B

    公开(公告)日：2001-05-31

    申请号：FI916141

    申请日：1991-12-27

    Applicant: MOTOROLA INC

    Inventor： ARENS JOHN W ,  BORTH DAVID E ,  KEPLER JAMES F

    IPC: H04B1/16 ,  H03G3/20 ,  H04B1/30 ,  H04B7/005 ,  H04L27/14 ,  H04L27/22

    Abstract: There is provided a mechanism for Automatic Gain Control in a receiver. It comprises: determining, within a certain dynamic range, the difference in power between the desired signal and a signal received, and providing open loop gain control for the signal in response to the differential so determined, scaled by the receiver's gain characteristics, such that the signal is positioned within dynamic range so as to reduce saturation and noise.

    METODO Y APARATO PARA DESMODULACION Y DETECCION DE BITS DE CONTROL DE POTENCIA EN UN SISTEMA DE COMUNICACIONES DE ESPECTRO EXTENDIDO.
    42.
    发明专利
    METODO Y APARATO PARA DESMODULACION Y DETECCION DE BITS DE CONTROL DE POTENCIA EN UN SISTEMA DE COMUNICACIONES DE ESPECTRO EXTENDIDO. 未知

    公开(公告)号：MX9702273A

    公开(公告)日：1998-04-30

    申请号：MX9702273

    申请日：1997-03-26

    Applicant: MOTOROLA INC

    Inventor： LING FUYUN ,  BORTH DAVID E ,  FRANK COLIN D ,  RASKY PHILLIP D ,  KEPLER JAMES F

    IPC: H04B1/707 ,  H04B7/005 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04L25/02 ,  H03D1/00 ,  G06F9/00

    Abstract: Un circuito receptor (400, 500) recibe una señal de comunicaciones de espectro extendido, por ejemplo una señal de DS-CDMA, que incluye un canal piloto y un asignador de control de potencia. La señal es reducida y decodificada. Los símbolos piloto en el canal piloto son provistos a un estimador de canal (408) para estimar la fase de canal y la ganancia de canal del canal de comunicaciones. Esta estimacion es provista a un desmodulador (422) para desmodular los símbolos de canal de tráfico. Los símbolos piloto son provistos a otro estimador de canal (410) para estimar la fase de canal y la ganancia de canal para el asignador de control de potencia. Esta estimacion es provista a un desmodulador (424) para desmodular el asignador de control de potencia. Los símbolos de canal de tráfico son retardados un tiempo predeterminado en un elemento de retardo (420) antes de su desmodulacion. El asignador de control de potencia es retardado un breve lapso o no es retardado en absoluto en un elemento de retardo corto (418) antes de su desmodulacion.

    Spread spectrum communication system
    43.
    发明专利
    Spread spectrum communication system 未知

    公开(公告)号：GB2311702A

    公开(公告)日：1997-10-01

    申请号：GB9705960

    申请日：1997-03-21

    Applicant: MOTOROLA INC

    Inventor： LING FUYUN ,  BORTH DAVID E ,  FRANK COLIN D ,  RASKY PHILLIP D ,  KEPLER JAMES F

    IPC: H04B1/707 ,  H04B7/005 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04L25/02 ,  H04J13/04

    Abstract: A receiver circuit (400, 500) receives a spread spectrum communication signal, such as a DS-CDMA signal, including a pilot channel and including a power control designator. The signal is despread and decoded. The pilot symbols on the pilot channel are provided to a channel estimator (408) for estimating the channel phase and channel gain of the communication channel. This estimate is provided to a demodulator (422) for demodulating the traffic channel symbols. The pilot symbols are provided to another channel estimator (410) for estimating channel phase and channel gain for the power control designator. This estimate is provided to a demodulator (424) for demodulating the power control designator. The traffic channel symbols are delayed a predetermined time in a delay element (420) before demodulating. The power control designator is delayed a short time or not at all in a short delay element (418) before demodulation.

    47.
    发明专利
    未知

    公开(公告)号：MX9306209A

    公开(公告)日：1994-05-31

    申请号：MX9306209

    申请日：1993-10-06

    Applicant: MOTOROLA INC

    Inventor： BORTH DAVID E ,  HAUG JOHN R ,  RASKI PHILLIP D

    IPC: H04W36/14 ,  H04W36/30 ,  H04W48/18 ,  H04W60/00 ,  H04W76/04 ,  H04W92/02 ,  H04M1/00

    Abstract: Registration operates by sensing (106) the availability of a first communication system. A quality factor of a channel of the system is measured (111). A channel of the first system is selected if the quality factor of the channel exceeds a threshold (113). If selected, the subscriber attempts to register the call (114). If the registration fails, the availability of a second communication system is sensed (107). A quality factor of a channel of the second system is measured (111) and selected (113), if the quality factor exceeds a threshold. The subscriber will then attempt to register (114) with the second system. Reassignment operates by determining if the first system has reached a capacity limit (126). If it has, it determines if a channel on the second system is available (128). If available, a transfer of the call from the first to the second system will be attempted (132).

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