Improved Channel Modeling for Performance Analysis of a DS-CDMA Link with Exponential Delay Profile

: This paper developes a refined model for direct sequence (DS) spread spectrum transmission over a Rician fading channel. The path gains in the channel are modeled with an exponential delay profile rather than the uniform profile prevalent in other papers. Additionally, some components of the multipath are included in the desired signal. An expression for the local-mean bit error rate (BER) is derived from this model, which is extended to an analysis of the packet erasure rate (PER). I. INTRODUCTION The performance of wireless transmission in a multiuser indoor environment is fundamentally limited by interference due to the presence of signals from other users as well as multipath. Such an environment has been envisioned by many in the personal communications industry, who have proposed picocellular indoor communications networks which deliver integrated services to users via wireless CDMA transmission. A high speed network would be used to perform database retrieval and number crunc..