Iterative Detection for DS/CDMA using Antenna Arrays and FEC on Multi-path Channels

This paper investigates a multiple-access communication receiver system that receives coded data modulated using DS-CDMA, with an antenna array in a multi-path propagation environment. We describe an iterative receiver that improves the initial estimates from the antenna array, and therefore reduces the multiple access inter-ference(MAI). We also introduce a technique to eeciently mitigate the inter-path interference (IPI) between multi-path components. Simulation results show that the performance approaches that obtained when only one users signal is incident on the array. This occurs even with a large number of users in comparison to the total diversity due to the spreading gain and the number of array antenna elements.