Patent ID: 6947707
Filing Date: 2005-09-20
Classification: H04B

Abstract:
1. In a communication system having a first communication station for communicating a communication signal to a second communication station, the communication signal weighted at the first communication station with a first weight for communication to the second communication station by way of a first channel path and weighted at the first communication station with a second weight for communication to the second communication station by way of a second channel path, an apparatus for verifying values indicative of the first weight and the second weight, said apparatus comprising: a sequence estimator coupled to receive indications of a transmitted portion of the communication signal, once received at the second communication station, said sequence estimator for estimating estimated values of the first weight and of the second weight by which the transmitted portion of the communication signal is weighted, the estimated values formed by said sequence estimator selected responsive to both a memory component and a current component, the estimated values verifying the values indicative of the first weight and the second weight, said sequence estimator comprising a trellis matrice defining a plurality of states, each state formed of allowable values of said first and second weights, and wherein the estimated values formed by said estimator are formed by a branch metric extending through the trellis matrice, said branch metric being determined with reference to a signal-to-noise ratio.