VLSI Design of Demodulating Fingers with Lowe Hardware Complexity for MC-CDMA Mobile System

MC-CDMA 이동국의 하드웨어 복잡도를 줄이기 위한 다중경로 복조기의 설계

This paper presents an efficient hardware architecture of demodulating fingers to demodulate the multi-path propagating signals in MC-CDMA Mobile System. We design a new architecture of demodulating fingers which share the single arithmetic unit to reduce the hardware complexity. This arithmetic unit performs MAC(Multiplication and Accumulation) operations of all demodulating fingers. The proposed architecture is suitable for Is-95 based CDMA PCS system. Three demodulating fingers for MC-CDMA which demodulate 7 channels contain about 42K logic gates. Our proposed system is shown to be very useful for Multi-Code CDMA system in which several channels are demodulated simultaneously.