Blind frequency domain equalization for CP-CDMA downlink
Wing Seng Leon, Ying‐Chang Liang · 2006
This paper presents a blind approach to chip-level equalization for cyclic-prefix code division multiple access (CP- CDMA) downlink systems. The frequency domain equalization (FEQ) filter coefficients are computed without the need of train- ing symbols. Like the time domain equalization (TEQ) approach presented by Li et. al., the FEQ tap weights are obtained by solving a minimum output energy problem which employs the subspaces spanned by both active and passive codewords. Furthermore, we also show the conditions which affects the convergence of the proposed blind FEQ algorithm. Simulation results are presented to verify the performance of the proposed FEQ.