Efficient Spreading Code Allocation Strategy for a Downlink MC-CDMA System in a Time Varying Frequency Selective Channel
Hassan El Ghazi, Christelle Garnier, Yves Delignon · 2006
In this paper, we investigate the impact of Walsh-Hadamard spreading code allocation on the performance of a downlink MC-CDMA system in a time varying frequency selective channel. The analysis shows that this impact is important on the multiple access interference and the inter-carrier interference power levels. We propose a code allocation strategy that minimizes the global interference power and significantly improves the performance of the MC-CDMA system