ON MITIGATING MULTIPATH INTERFERENCES WITH RECONSTRUCTAND-SUPPRESS SCHEME OVER MIMO-CDMA RAKE RECEIVERS

摘要

The aim of this paper is to employ parallel rake receivers torndecode the orthogonality-inherent space-time spreading andrnto overcome the signal time dispersion in the MIMOCDMArnwireless systems. To decrease the inter-symbolrninterference (ISI) caused by signal propagation delay due tornthe multipath effect, we propose a reconstruct and suppressrnmechanism to reduce the influence. Our system withrnmaximum ratio combining (MRC) and low complexityrnmaximum likelihood (ML) detector can achieve a betterrnperformance in non-quasi static channel. Simulation resultsrnshow that the proposed MPI suppression mechanism canrnlower the error floor significantly than conventionalrnMIMO-CDMA with space-time block code (STBC) inrnmultipath environment over fast fading channel.