Patent ID: 6542756
Filing Date: 2003-04-01
Classification: H04W

Abstract:
At a base station, a method for detecting forward link power control bits of a remote device which transmits a signal having an in-phase and a quadrature-phase component, wherein each of said in-phase and quadrature components are transmitted as a consecutive sequence of frames and wherein each frame includes a plurality of power control groups, each power control group including non-power control data and power control data, said method comprising the steps of:(a) receiving said signal; (b) summing said non-power control data from the in-phase component of at least one of said power control groups to obtain a first result; (c) summing said non-power control data from the quadrature-phase component of at least one of said power control groups to obtain a second result; (d) summing said power control data from the in-phase component of one of said power control groups to obtain a third result; (e) summing said power control data from the quadrature-phase component of one of said power control groups to obtain a fourth result; (f) multiplying said first result by said third result to obtain a first intermediate result; (g) multiplying said second result by fourth result to obtain a second intermediate result; (h) summing said first and second intermediate results to obtain a final result; (i) determining that a transmitted power control bit is positive when said final result is positive; and (j) determining that a transmitted power control bit is a negative when said final result is negative.