Patent ID: 6026131
Filing Date: 2000-02-15
Classification: H03G,H04L

Abstract:
An automatic gain control system for use with a receiver including means for producing in-phase (I) and quadrature (Q) signals said automatic gain control system comprising:means for converting said I and Q signals to first and second samples respectively;means for computing a received signal strength value in response to said first and second samples;means for comparing said received signal strength value with a threshold;means for incrementally changing a gain value provided said received signal strength value is less than said threshold; andmeans for providing said receiver with an automatic gain control signal which is based upon said gain value,wherein said computing means computes for each of a succession of samples the quantity:Smx-K.Smn, where Smx represents the larger of the first and second samples in a pair and Smn represents the lesser of first and second samples in a pair, and K is a fractional coefficient.