An Efficient Rake Receiver Design for WCDMA System
Seongsu Yang, Jin‐Yong Lee, Soojin Kim, Younglok Kim · ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications · 2008
In wideband code division multiple access system, Rake receiver is gernerally applied as its equalization algorithm. The equalizaer is the most critical part in terms of the computational complexity of the receiver. Hence more efficient receiver implementin is needed to save power consumption and reduce the computational complexity. In this paper, channel capacity and optimal energy allocation algorithm is applied to reduce the complexity of Rake receiver. We choose effective Rake fingers among multi-path components. Then we reallocate weight factors and combine effective Rake fingers. Applying proposed algorithm, we obtain advantage up to 2㏈ of performance at 0.1% of bit error rate. With about 0.57% additional computational complexity, we can find the optimal number of Rake fingers and reduce computations of unused Rake fingers.