Performance Analysis of Adaptive Chaos Based CDMA System with Antenna Diversity in Frequency Selective Channel

摘要

This paper presents the theoretical analysis of the adaptive multiuser DS-CDMA system with antenna diversity in frequency selective channel environment. Pilot symbols are added to users' data to estimate the complex fading coefficients. Least mean square algorithm is used for estimating the channel coefficients. Performance of receiver antenna diversity using maximal ratio combining is investigated. Effect of channel estimation and intersymbol interference is studied analytically and probability of error in closed form is derived. Under the perfect synchronization assumption, simulation results show that the performance of system deteriorates with increase in number of multipaths components and can be improved using antenna diversity.