Equalization in CDMA downlink based on channel estimation

Abstract

Abstnrd--RAKE receiver deteriorates as MA1 (Multi Access Interference) become serious in CDMA downlink channel. Orthogonality of spreading sequences can be restored through equalization on chip levels. In this paper, ZF (Zero Forcing ) and MMSE (minimum mean square error) equalization on chip levels are studied and simulated Moreover, an adaptive algorithm and a simplified equalizer architecture is proposed to lower computation Complexity.