Patent ID: 8169993

Claim:
A method for determining a quality of a signal transmitted by a base station comprising: sampling a received CDMA base station signal in a frequency channel of interest to provide a total received power; demodulating the received CDMA signal and constructing an ideal reference signal by modulating the demodulated received CDMA signal and creating a modulated ideal reference signal; correlating between the ideal reference signal and the received CDMA signal to determine a Rho value as a ratio of power of the modulated ideal reference signal to the total received signal power; performing a self cross correlation to separate signals from the received CDMA signal on different delay paths; determining a multipath power value x as a total power of signals on non-dominant ones of the delay paths from the received CDMA signal; performing a pilot code correlation pilot scan of the sampled signal to determine strengths of signals from neighboring co-channel base stations; summing the power levels of the neighboring co-channel base station signals to provide a total pilot pollution power y; and calculating an adjusted Rho (Rho adj ) using a relation Rho adj =Rho/(1−x−y).