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    11.
    发明专利
    未知

    公开(公告)号：DE69925800T2

    公开(公告)日：2006-05-04

    申请号：DE69925800

    申请日：1999-02-19

    Applicant: QUALCOMM INC

    Inventor： GILHOUSEN S ,  BUTLER K ,  BENDER PAUL ,  AGRAWAL AVNEESH

    IPC: H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04W36/08 ,  H04W36/18 ,  H04W36/30 ,  H04W52/00 ,  H04W52/24 ,  H04W52/40 ,  H04W52/44 ,  H04W52/58 ,  H04W52/60 ,  H04W56/00 ,  H04W68/00

    Abstract: A system and method is taught for controlling the power level of transmissions within a communication system having a base station, a mobile station, a communication channel, and a pilot channel. The mobile station determines a signal strength value according to a communication signal received by way of the communication channel. A pilot channel signal is determined according to a pilot signal transmitted by way of the pilot channel. The signal to noise ratio of the communication signal is determined according to the determined signal strength value and the pilot channel signal. The power level of a transmission is controlled according to the signal to noise ratio. The noise level in a communication channel within the communication system is estimated. The pilot channel signal includes pilot energy and pilot noise components. The pilot energy component is removed to provide a remaining pilot signal. Communication system operations are controlled according to the remaining pilot signal. The power levels of transmissions are controlled by determining the signal to noise ratio of a signal within the communication channel and determining a difference signal. The difference signal is formed by determining the difference between determined and desired signal to noise ratios. The difference signal is transmitted between the base station and the mobile station. The pilot channel has at least one frame and the power control signal is inserted into the frame. Thus, information representing the strength of the communication signal is transmitted to the base by way of the pilot channel within the frame. The pilot channel can have two information frames for transmitting the power control signal a plurality of times.

    12.
    发明专利
    未知

    公开(公告)号：DE69925800D1

    公开(公告)日：2005-07-21

    申请号：DE69925800

    申请日：1999-02-19

    Applicant: QUALCOMM INC

    Inventor： GILHOUSEN S ,  BUTLER K ,  BENDER PAUL ,  AGRAWAL AVNEESH

    IPC: H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04W36/08 ,  H04W36/18 ,  H04W36/30 ,  H04W52/00 ,  H04W52/24 ,  H04W52/40 ,  H04W52/44 ,  H04W52/58 ,  H04W52/60 ,  H04W56/00 ,  H04W68/00 ,  H04Q7/38

    Abstract: A system and method is taught for controlling the power level of transmissions within a communication system having a base station, a mobile station, a communication channel, and a pilot channel. The mobile station determines a signal strength value according to a communication signal received by way of the communication channel. A pilot channel signal is determined according to a pilot signal transmitted by way of the pilot channel. The signal to noise ratio of the communication signal is determined according to the determined signal strength value and the pilot channel signal. The power level of a transmission is controlled according to the signal to noise ratio. The noise level in a communication channel within the communication system is estimated. The pilot channel signal includes pilot energy and pilot noise components. The pilot energy component is removed to provide a remaining pilot signal. Communication system operations are controlled according to the remaining pilot signal. The power levels of transmissions are controlled by determining the signal to noise ratio of a signal within the communication channel and determining a difference signal. The difference signal is formed by determining the difference between determined and desired signal to noise ratios. The difference signal is transmitted between the base station and the mobile station. The pilot channel has at least one frame and the power control signal is inserted into the frame. Thus, information representing the strength of the communication signal is transmitted to the base by way of the pilot channel within the frame. The pilot channel can have two information frames for transmitting the power control signal a plurality of times.

    13.
    发明专利
    未知

    公开(公告)号：DE69733019D1

    公开(公告)日：2005-05-19

    申请号：DE69733019

    申请日：1997-05-28

    Applicant: QUALCOMM INC

    Inventor： ODENWALDER P ,  BUTLER K ,  TIEDEMANN G ,  ZEHAVI EPHRAIM

    IPC: H04J3/12 ,  H04J3/16 ,  H04J13/00 ,  H04L1/00 ,  H04L1/08 ,  H04L1/12 ,  H04L1/18 ,  H04L25/02 ,  H04L25/05 ,  H04B1/707

    Abstract: A novel and improved method and apparatus for generating a constant data rate channel supporting signaling data transmission in an adjustable rate wireless communication system is described. In accordance with one aspect of the invention the rate at which the channel operates may be adjusted based on the particular use and environmental conditions such that the appropriate data rate up to a maximum capability can be achieved. User data is then placed into frames based on the selected rate. When available, signaling data is added into each frames in a predetermined amount. The resulting frame is encoded, repeated and punctured based on the selected rate and whether signaling data has been introduced, and transmitted via RF signals to the receive system. Upon reception, the frame is processed in accordance with having only user data and with having signaling data. That is, the frame is processed both as if it had signaling data and as if no signaling data were present. Once the frame is processed, the particular processing that is more likely to be correct is determined via error checking. If the signaling data processed frame is more likely to have be correct, the signaling data is separated from the user data and each processed accordingly. If the non-signaling data processing is determined to be more likely to be correct, the frame is processed as if it were entirely comprised of user data.

    14.
    发明专利
    未知

    公开(公告)号：DE69429356T2

    公开(公告)日：2002-08-22

    申请号：DE69429356

    申请日：1994-09-23

    Applicant: QUALCOMM INC

    Inventor： KINDRED RAY ,  BUTLER K ,  ZEHAVI EPHRAIM ,  WOLF KEIL

    IPC: H04L1/12 ,  H03M13/23 ,  H03M13/37 ,  H03M13/41 ,  H04B1/707 ,  H04L1/00 ,  H04L1/08 ,  H04L1/20 ,  H04L25/02 ,  H04L25/03 ,  H04L25/08 ,  H04B7/26 ,  H03M13/00

    Abstract: A Viterbi decoder for recovering the original bit data stream that was convolutionally encoded as a code symbol stream in a Code Division Multiple Access (CDMA) mobile communication system. The decoder simultaneously decodes at the several data rates associated with certain multirate vocoders. The decoder can decode at an unknown data rate in either continuous or framed packet modes. It accomplishes this by simultaneously decoding at multiple rates and by creating one or more data quality metrics for each decoded data packet. Special input and output buffering is provided to isolate the decoder from system timing constraints. The input buffer includes selection and accumulation logic to organize code symbol data into the packet order for repeat mode or random burst mode at lower frame data rates. Decoded data packets for each of several predetermined data transfer rates are held in an output buffer for about half of the decoding cycle, thereby permitting the system microprocessor to examine and select the appropriate decoded data packet. The decoder also can be reconfigured to operate at any one of several predetermined convolutional encoding algorithms. The Viterbi decoder, implemented as a single monolithic integrated circuit, can be used in any and all of many different multiuser telecommunications channels.

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