Patent ID: 6418175
Filing Date: 2002-07-09
Classification: H04B

Abstract:
A method for determining strength of co-channel signals, the method being used in a digital radio system comprising several base stations and subscriber terminals, which operate as transmitters and receivers for signals that are desired signals and/or interference signals and that propagate in channels and that comprise at least one predetermined sequence characteristic of the transmitter, the signals being sampled when they are received, whereinforming subsets of predetermined sequences from the predetermined sequences related to the signals to be received, performing channel estimation separately for each subset based on the samples of the received co-channel signals and the subsets formed, and a channel estimate related to each subset being formed as a result of the estimation, and forming, by means of the channel estimate, an estimate signal for the subset, the signal being compared to the received signal, and forming, by means of said comparison, a strength estimate that describes the strength of at least one signal of the subset and that is used to select at least one subset with the greatest signal strength.