Patent ID: 6625203
Filing Date: 2003-09-23
Classification: H04B

Abstract:
A method for detecting data from K data signals transmitted over a shared spectrum in a code division multiple access communication system, the method comprising:receiving and sampling a combined signal having the K transmitted 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 fourier transform of a complex conjugate transpose of the combined channel response matrix multiplied to the combined signal samples; multiplying an inverse of a fourier transform of each block entry to a result of the fourier transform to produce a fourier transform of a data vector; and taking an inverse fourier transform of the data vector fourier transform to produce data of the K data signals.