Patent ID: 7362799
Filing Date: 2008-04-22
Classification: H04B

Abstract:
1. A radio communication system comprising: a plurality of base stations, each base station servicing a plurality of user terminals, wherein each base station has a receiver that includes an array of spatially distributed antenna elements and receives communication signals from two or more user terminals, said communication signals received as a composite signal, each of said communication signals having a parameter value within a corresponding subset of a parameter value set for the composite signal, the subset for each communication signal orthogonal to respective corresponding parameter value subsets of other communication signals in the composite signal, such that each parameter value is estimated using the composite signal by searching over the corresponding subset of the parameter value set; and a plurality of digital processing devices to estimate the parameter value for two or more of the communication signals in parallel, wherein each of the plurality of digital processing devices estimates a parameter value for a communication signal using a different parameter value subset and wherein a covariance matrix computation and a Cholesky decomposition are performed in one of the plurality of digital processing devices and a result of said covariance matrix computation and Cholesky decomposition is transmitted to each of the other digital processing devices.