A WCDMA multipath searcher based on a Wave Pipeline method

In this paper, we present the wave pipeline implementation of a multiplier-accumulator that processes complex numbers for high-speed signal processing in the third generation cellular systems. Since the multiplier-accumulator is one of the most computationally intensive and power hungry blocks in the multipath searcher, there is a need to develop high performance and low power arithmetic units. The complementary pass-logic transmission-gate (CPL-TG) has been used as a universal cell for the creation of conventional logic gates. The developed complex multiplier-accumulator (CMAC) processes four inputs of 8 bits at a rate of 500 Mb/s using a 0.18 mum technology.

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