Performance evaluation of RAKE receiver for cellular CDMA systems

Abstract

The paper presents closed form expressions for calculating the performance of a practical RAKE receiver. To solve the statistical problem encountered when deriving the performance, the pdf of Z/sub L/ was first derived, which was defined as the sum of the largest /spl mu/ samples among L identically and exponentially distributed random variables, by invoking order statistics. Using the pdf of Z/sub L/, the average BER of the power controlled single cell CDMA system was obtained The results show that the performance improves as the number of PN correlators, /spl mu/ increases. However as the number of /spl mu/ increases one by one, the performance improvement becomes narrower and narrower. Finally, we can also find that performance improves as the number of resolvable paths of channel increases at the same fixed number of correlators.< >