FOURIER-TRANSFORM BASED LINEAR EQUALIZATION FOR CDMA DOWNLINK

摘要

In the reception of a CDMA signal, the receiving unit performs a simplified process of linear equalization that eliminates the need for inverting the correlation matrix. For the single antenna reception case, the correlation matrix is approximated to a good degree by a circulation matrix that is diagonalized by FFT operations, thus substituting two FFTs and one IFFT having a complexity of O(3/2LFIogLF) for the direct matrix inversion having a complexity of O(LF<3>). The extension of this method uses a multiple antenna reception system with oversampling.