Adaptive power control for a spread spectrum communications syst

Details Adaptive power control for a spread spectrum communications syst Adaptive power control for a spread spectrum communications syst

1991-11-19

1994-03-29

Swann, Tod R.

Pulse or digital communications

Repeaters

Testing

380 34, H04K 100

Patent

active

052992268

ABSTRACT:
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. A base station transmits a first spread-spectrum signal. A mobile station has an automatic-gain-control circuit for generating an AGC-output signal, from a received signal. The received signal includes the first spread-spectrum signal and an interfering signal. The mobile station also has a correlator for despreading the AGC-output signal, a power-measurement circuit responsive to processing the received signal with the despread AGC-output signal for generating a received-power level, a comparator coupled to the power-measurement circuit for generating a comparison signal by comparing the received-power level to a threshold level, a transmitter for transmitting a second spread-spectrum signal, an antenna, and a variable-gain device responsive to the comparison signal for adjusting a transmitter-power level of the second spread-spectrum signal.

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R. F. Ormondroyd, "Power Control For Spread-Spectrum Systems", Conference on Communications Equipment and Systems. Apr. 20-22 1982. pp. 109-115.
8049 IEEE Proceedings, section A-K, vol. 129, Jun. 1982, No. 3, Part F, Old Woking, Surrey, Great Britain.

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