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    131.
    发明专利
    未知

    公开(公告)号：FI982221A0

    公开(公告)日：1998-10-13

    申请号：FI982221

    申请日：1998-10-13

    Applicant: QUALCOMM INC

    Inventor： ANTONIO FRANKLIN P ,  GILHOUSEN KLEIN S

    IPC: H04J3/00 ,  H04B1/04 ,  H04B7/26 ,  H04B15/00 ,  H04B15/02 ,  H04B

    Abstract: A system and method for reducing radio frequency interference arising in connection with pulsed transmission over time division multiplexed communication channels. In a first embodiment, a subscriber station is nominally assigned all of the slots of each frame of a first transmit channel. By transmitting RF energy substantially continuously, the subscriber station reduces interference arising from pulsed transmission. In a second embodiment, a subscriber station is nominally assigned one or more slots of each frame of a primary channel for conventional transmission of useful information, and is also instructed to continuously transmit RF energy over an auxiliary channel at times other than during the assigned primary channel slots. In this way, interference generated in the vicinity of the subscriber station is reduced due to the substantially continuous transmission of RF energy by the subscriber station. More than one subscriber station may simultaneously utilize the auxiliary channel during reduced interference mode operation.

    System and method for reducing interference generated by a digital communication device
    135.
    发明专利
    System and method for reducing interference generated by a digital communication device 未知

    公开(公告)号：AU2731897A

    公开(公告)日：1997-11-07

    申请号：AU2731897

    申请日：1997-04-15

    Applicant: QUALCOMM INC

    Inventor： ANTONIO FRANKLIN P ,  GILHOUSEN KLEIN S

    IPC: H04J3/00 ,  H04B1/04 ,  H04B7/26 ,  H04B15/00 ,  H04B15/02

    Abstract: A system and method for reducing radio frequency interference arising in connection with pulsed transmission over time division multiplexed communication channels. In a first embodiment, a subscriber station is nominally assigned all of the slots of each frame of a first transmit channel. By transmitting RF energy substantially continuously, the subscriber station reduces interference arising from pulsed transmission. In a second embodiment, a subscriber station is nominally assigned one or more slots of each frame of a primary channel for conventional transmission of useful information, and is also instructed to continuously transmit RF energy over an auxiliary channel at times other than during the assigned primary channel slots. In this way, interference generated in the vicinity of the subscriber station is reduced due to the substantially continuous transmission of RF energy by the subscriber station. More than one subscriber station may simultaneously utilize the auxiliary channel during reduced interference mode operation.

    136.
    发明专利
    未知

    公开(公告)号：BR9508102A

    公开(公告)日：1997-08-12

    申请号：BR9508102

    申请日：1995-06-22

    Applicant: QUALCOMM INC

    Inventor： ANTONIO FRANKLIN P ,  WOLF JACK K

    IPC: H01Q3/24 ,  H01Q3/26 ,  H04B1/7085 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/26 ,  H04L1/06 ,  H04W16/28 ,  H04Q7/36

    Abstract: A system and method for adaptively sectorizing channel resources within a digital cellular communication system is disclosed herein. The system includes an antenna arrangement for providing at least first and second electromagnetic beams for receiving a first information signal transmitted by a specific one of a plurality of users, thereby generating first and second received signals. A first set of beam-forming signals are then generated from the first and second received signals. A demodulating receiver is provided for demodulating at least first and second beam-forming signals included within the first set of beam-forming signals, thereby producing first and second demodulated signals. The system further includes a tracking network for tracking multipath information signals, received from various positions and angles of incidence, based on comparison of the first and second demodulated signals.

    Adaptive sectorization in a spread spectrum communication system
    137.
    发明专利
    Adaptive sectorization in a spread spectrum communication system 未知

    公开(公告)号：AU2908695A

    公开(公告)日：1996-01-19

    申请号：AU2908695

    申请日：1995-06-22

    Applicant: QUALCOMM INC

    Inventor： ANTONIO FRANKLIN P ,  GILHOUSEN KLEIN S ,  WOLF JACK K ,  ZEHAVI EPHRAIM

    IPC: H01Q3/24 ,  H01Q3/26 ,  H04B1/7085 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/26 ,  H04L1/06 ,  H04W16/28 ,  H04Q7/36

    Abstract: A system and method for adaptively sectorizing channel resources within a digital cellular communication system is disclosed herein. The system includes an antenna arrangement for providing at least first and second electromagnetic beams for receiving a first information signal transmitted by a specific one of a plurality of users, thereby generating first and second received signals. A first set of beam-forming signals are then generated from the first and second received signals. A demodulating receiver is provided for demodulating at least first and second beam-forming signals included within the first set of beam-forming signals, thereby producing first and second demodulated signals. The system further includes a tracking network for tracking multipath information signals, received from various positions and angles of incidence, based on comparison of the first and second demodulated signals.

    138.
    发明专利
    未知

    公开(公告)号：AT124583T

    公开(公告)日：1995-07-15

    申请号：AT89903010

    申请日：1988-12-21

    Applicant: QUALCOMM INC

    Inventor： GILHOUSEN KLEIN S ,  ANTONIO FRANKLIN P ,  JACOBS IRWIN M

    IPC: H04B7/212 ,  H04J3/00 ,  H04J3/16 ,  H04J3/24 ,  H04Q7/06 ,  H04Q7/08 ,  H04Q7/12 ,  H04Q7/18 ,  H04Q7/38 ,  H04B7/26

    Abstract: A message communication system employing one or more centralized communication stations transmitting messages through Earth orbit relay satellites to mobile receivers utilizing Time Division Multiplexed (TDM) communication signals having signal time frames divided into a series of transmission channels. A predetermined number of the channels are designated as address channels with the remainder being used for data transfer. Information transmitted on the address channels is used by receivers to determine both the presence of a message and its corresponding data transmission channel. Each system receiver scans, and tracks only the communication signal address channels until a message addressed to that receiver is detected, at which time the selected receiver changes channels to the designated data channel for reception of the message. Thus, demodulation of the entire communication signal is not required and processing time and power is reduced for the typical waiting condition when messages are not being received. While a message is being received only a portion of the communication signal need to be received, demodulated and decoded. The decoded message is then displayed on a display screen or similar device for the recipient.

    A variable block size adaptation algorithm for noise-robust acoustic echo cancellaton
    139.
    发明专利
    A variable block size adaptation algorithm for noise-robust acoustic echo cancellaton 未知

    公开(公告)号：ZA948430B

    公开(公告)日：1995-06-29

    申请号：ZA948430

    申请日：1994-10-26

    Applicant: QUALCOMM INC

    Inventor： SIH GILBERT C ,  ANTONIO FRANKLIN P

    IPC: H03H21/00 ,  H04B3/23 ,  G10K ,  G05B

    Abstract: An apparatus that automatically adjusts the adaptation block size for a least-mean square (LMS) adaptive filter depending on the input signal-to-noise ratio (SNR) is disclosed. The apparatus monitors the instantaneous SNR and continually adjusts the block size to provide high noise immunity, thereby increasing the convergence speed of the filter and decreasing the asymptotic mean-square error. An exemplary embodiment of the present invention is presented in the context of acoustic echo cancellation, though it is noted that the adaptive filter of the present invention is useful in any environment in which the noise characteristics are subject to change.

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