Adaptive implementation of polynomial expansion detector for multi-user detection in DS-CDMA systems

The polynomial expansion (PE) multi-user detector was proposed to eliminate the computational complexity of matrix inversion involved in the decorrela ting detector and the MMSE detector. Computation of the polynomial coeffici ents in a PE detector is, however. a complex task. A fast converging adapti ve algorithm based on the Davidon-Fletcher-Powell (DFP) method is proposed for computing polynomial weights for a PE detector,