A hybrid equalizer/Rake receiver for the Wideband CDMA Downlink in largedelay spread channels

[摘要] Signals transmitted over a multi-path propagation channel exhibit Inter-PathInterference (IPI) and fading. The receiver has to employ measures to mitigatethese effects or it will incur severe performance degradation. A classicapproach in Code Division Multiple Access (CDMA) communications is the Rakereceiver. Alternatively, a Linear Minimum Mean Square Error (LMMSE) equalizercan further improve performance. This paper compares performance andcomputational complexity of these two algorithms. A hybrid solution will beintroduced in order to decrease computational complexity while retaining mostof the interference suppression capabilities of the LMMSE equalizer.

[学科分类] 电子、光学、磁材料