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Adaptive power control for a spread spectrum transmitter

DC
  • US 5,093,840 A
  • Filed: 11/16/1990
  • Issued: 03/03/1992
  • Est. Priority Date: 11/16/1990
  • Status: Expired due to Term
First Claim
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1. An apparatus for adaptive-power control of a spread-spectrum transmitter of a mobile station operating in a cellular-communications network using spread-spectrum modulation, comprising:

  • a base station for transmitting a generic spread-spectrum signal and an APC-data signal;

    a multiplicity of said mobile stations, each mobile station havingan acquisition circuit for acquiring and decoding the generic spread-spectrum signal;

    a detector coupled to said acquisition circuit for detecting a received power level of the generic spread-spectrum signal;

    a decoder coupled to said acquisition circuit for decoding the APC-data signal as a threshold;

    a differential amplifier coupled to said detector and said decoder for generating a comparison signal by comparing the received power level to said threshold;

    a transmitter for transmitting a transmitter spread-spectrum signal;

    an antenna coupled to said transmitter; and

    a variable-gain device coupled to said differential amplifier and between said transmitter and said antenna, responsive to said comparison signal indicating an increase or decrease for adjusting a transmitter-power level of the transmitter spread-spectrum signal from said transmitter.

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