Rulon G Vandyke

US Patent:

57217572, Feb 24, 1998

Filed:

Mar 20, 1996

Appl. No.:

8/619044

Inventors:

An Tuyen Banh - Forest VA
Rulon G. VanDyke - Parsippany NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04L 2708

US Classification:

375345

Abstract:

In accordance with one embodiment of the present invention, in a wireless telecommunications system, an automatic gain control loop for a base station, comprises a demodulator having at least one output terminal. The demodulator is adapted to demodulate signals received by the base station so as to provide a plurality of phase signals via its output terminals. These phase signals correspond to the phase of the signals received by the base station. A plurality of variable-gain amplifiers are adapted to receive one of the phase signals and to change the amplitude of said phase signals. A plurality of signal processing units are adapted so as to receive signals provided by the variable amplifiers, and each of the signal processing units is further adapted to generate a feedback control signal so as to control the gain of each one of the variable-gain amplifiers. In accordance with another embodiment of the invention, a method for controlling the gain of signals received by a base station in a cellular communication system comprises the steps of demodulating the signals so as to generate phase signals corresponding to the received signals, variably controlling the magnitude of each one of the phase signals based on a feedback control signal, and processing the phase signals so as to generate the feedback control signal.