Performance Evaluation of an Alamouti Space-Time Block Encoded Multi-user DS-CDMA Wireless Communication System

Abstract

This paper evaluates the performance of a simulated Alamouti STBC encoded Multi-user DS-CDMA based wireless communication system. In this designed communication system, ½ rated convolutional encoding and interleaving schemes were utilized over an AWGN and Rayleigh fading channels. Two transmitting antennas and one receiving antenna was deployed in this scheme. The simulation study was made with the development of a computer program written in MATLAB source code and the BER results shows that the multi transmit antenna supported DS-CDMA system outperforms in retrieving various types of data of the individual user. The system is highly effective to combat inherent interferences under fading channel. System performance degrades while increasing level of digital modulations.