Automatic power control system for a code division multiple access (CDMA) communication system

Automatic power control system for a code division multiple access (CDMA) communication system

  • CN 1,095,257 C
  • Filed: 06/27/1996
  • Issued: 11/27/2002
  • Est. Priority Date: 06/30/1995
  • Status: Active Grant
First Claim
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1. , a kind of code division multiple address communication system has first and second communication stations, and the transmission power level at second communication station is controlled by automatic power controller, and first communication station receives the signal from the second communication station, and this system comprises:

  • First communication station has;

    The device that is used for the system power level of definite calibration;

    Be used for will calibration the magnitude of recruitment of system power level be added to the device of a threshold value as first error signal;

    Be used for estimating the device of uncorrelated noise of the channel at second communication station;

    Be used to measure the device of power level of the secondary signal of reception;

    Be used for will estimation uncorrelated noise and prearranged signals/noise ratio multiply each other and produce the device of the difference between secondary signal power level and the result of product;

    Be used for the subtractive combination of first error signal and generation device as the automated power control signal;

    AndBe used for the automated power control signal is transferred to the device at second communication station;

    This second communication station has;

    Be used to receive this automated power control signal and respond the device that the automated power control signal that receives is adjusted the power level at second communication station.

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