21.
    发明专利
    未知

    公开(公告)号:AT316718T

    公开(公告)日:2006-02-15

    申请号:AT97923491

    申请日:1997-04-28

    Applicant: QUALCOMM INC

    Abstract: A system and method for reducing the interference experienced by sensitive electronic devices, such as hearing aids, operative in the vicinity of CDMA user communication devices. A transmitter of the communications device is configured to transmit signal power substantially continuously at a full rate power level irrespective of the variable data rate at which the transmitter would otherwise be operative. In a first embodiment, a variable rate vocoder within the transmitter is directed to perform full-rate vocoding, irrespective of an instantaneous level of user speech. In a second embodiment, a microprocessor builds full-rate frames using repeated versions of code symbols generated by the vocoder. In a third embodiment, the microprocessor builds full rate frames by generating signaling bits of a predetermined pattern to pad otherwise non-full frames.

    METHOD SYSTEM, APPARATUS FOR CONTROLLING POWER OF SIGNAL IN A CDMA COMMUNICATION SYSTEM

    公开(公告)号:HU215857B

    公开(公告)日:1999-03-29

    申请号:HU9303239

    申请日:1992-05-17

    Applicant: QUALCOMM INC

    Abstract: A cellular communication system in which a system user and another user communicate with each other by way of information carrying spread spectrum modulated signals transmitted via a cell-site in which system: the system user comprises a transmitter for transmitting information carrying spread spectrum modulated signals to said cell-site, a receiver for receiving information carrying spread spectrum modulated signals from said cell-site and means for measuring signal quality in said information carrying spread spectrum modulated signals received by the system user; the cell-site comprises a transmitter for transmitting information carrying spread spectrum modulated signals to said system user, a receiver for receiving information carrying spread spectrum modulated signals from said system user and adjusting means for adjusting the power of information carrying spread spectrum modulated signals transmitted from the cell-site ; ; and power control means is provided for controlling the transmission power of the information carrying spread spectrum modulated signals by measuring the signal power in the information carrying spread spectrum modulated signals received by the system user and transmitting data representing the measured power to the cell-site by way of the information carrying spread spectrum modulated signals, the adjusting means being responsive to the data in the information carrying spread spectrum modulated signals from the system user to adjust the power in the information carrying spread spectrum modulated signals transmitted by the cell-site.

    System and method for recuding interference generated by a cdma communications device

    公开(公告)号:ZA973577B

    公开(公告)日:1998-10-26

    申请号:ZA973577

    申请日:1997-04-24

    Applicant: QUALCOMM INC

    Abstract: A system and method for reducing the interference experienced by sensitive electronic devices, such as hearing aids, operative in the vicinity of CDMA user communication devices. A transmitter of the communications device is configured to transmit signal power substantially continuously at a full rate power level irrespective of the variable data rate at which the transmitter would otherwise be operative. In a first embodiment, a variable rate vocoder within the transmitter is directed to perform full-rate vocoding, irrespective of an instantaneous level of user speech. In a second embodiment, a microprocessor builds full-rate frames using repeated versions of code symbols generated by the vocoder. In a third embodiment, the microprocessor builds full rate frames by generating signaling bits of a predetermined pattern to pad otherwise non-full frames.

    SYSTEM AND METHOD FOR REDUCING AM-INTERFERENCE GENERATED BY A CDMA COMMUNICATIONS DEVICE

    公开(公告)号:CA2252808A1

    公开(公告)日:1997-11-06

    申请号:CA2252808

    申请日:1997-04-28

    Applicant: QUALCOMM INC

    Abstract: A system and method for reducing the interference experienced by sensitive electronic devices, such as hearing aids, operative in the vicinity of CDMA user communication devices (10). A transmitter (56) of the communications device (10) is configured to transmit signal power substantially continuously at a full rate power level irrespective of the variable data rate at which the transmitter (56) would otherwise be operative. In a first embodiment, a variable rate vocoder (16) within the transmitter is directed to perform fullrate vocoding, irrespective of an instantaneous level of user speech. In a second embodiment, a microprocessor (18) builds full-rate frames using repeated versions of code symbols generated by the vocoder (16). In a third embodiment, the microprocessor (18) builds full rate frames by generating signaling bits of a predetermined pattern to pad otherwise non-full frames.

    Method and apparatus for performing preferred system selection

    公开(公告)号:AU2461797A

    公开(公告)日:1997-10-17

    申请号:AU2461797

    申请日:1997-03-26

    Applicant: QUALCOMM INC

    Abstract: A method and apparatus for selecting a communication system in accordance with the geographic region in which the subscriber station is located is described. Upon successful acquisition, a system determination processor examines the received system identification information and compares it with system identification information stored in a universal system table to determine the geographical region of the identified communication system. The system determination processor then determines whether the acquired system is the most desirable system for use in the geographical region. If it is the most desirable system for use in the geographical region, the system determination processor selects the acquired system for providing service. If it is not the most desirable system for use in the geographical region, the subscriber station attempts to acquire a more desirable system using information from the universal system table.

    METHOD AND APPARATUS FOR PERFORMING PREFERRED SYSTEM SELECTION

    公开(公告)号:CA2250032A1

    公开(公告)日:1997-10-02

    申请号:CA2250032

    申请日:1997-03-26

    Applicant: QUALCOMM INC

    Abstract: A method and apparatus for selecting a communication system in accordance with the geographic region in which the subscriber station is located. Upon successful acquisition, the subscriber station examines the received system identification information to determine its geographical region. The subscriber station then determines whether the acquired system is the most desirable system for use in the geographical region. If it is the most desirable system for use in the geographical region, the subscriber station provides service using the acquired system. If it is not the most desirable system for use in the geographical region, the subscriber station attempts to acquire a more desirable system.

    28.
    发明专利
    未知

    公开(公告)号:BR9405888A

    公开(公告)日:1995-12-26

    申请号:BR9405888

    申请日:1994-10-28

    Applicant: QUALCOMM INC

    Abstract: In a receiver having a plurality of demodulation elements, a method of assigning the plurality of demodulation element so a set of available signals. A first method emphasizes diversity of transmitting devices so that power control is optimal. A second method emphasizes the maximum signal strength available to produce aggregate maximum signal strength. Both methods control the number of reassignments so that excessive data is not lost during the reassignment process. The apparatus comprises the plurality of demodulation elements, at least one searcher element, and a controller.

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