Patent ID: 7447255
Filing Date: 2008-11-04
Classification: H04B

Abstract:
1. A method for a code division multiple access user equipment comprising: transmitting data signals over a shared spectrum; receiving and sampling a combined signal having K data signals over the shared spectrum; producing a combined channel response matrix using codes and impulse responses of the K data signals; determining a block column of a cross correlation matrix using the combined channel response matrix, each block entry of the block column being a K by K matrix; taking a first Fourier transform of a complex conjugate transpose of the combined channel response matrix multiplied with the combined signal samples; multiplying an inverse of a Fourier transform of each block entry of the block column to a result of the first Fourier transform to produce a Fourier transform of a data vector; and taking an inverse Fourier transform of the Fourier transform of the data vector to produce data of the K data signals.