Improved Interference Cancellation for Downlink Wavelet Based Multi-Carrier CDMA System
International Journal of Computer Science Issues · 2017
The current wireless mobile communication systems are occupying higher transmission bandwidths to support multimedia applications with high data rates.The multi-carrier code division multiple access (MC-CDMA) is one of the most promising candidates for the future generations of wireless mobile communications.Inter-symbol interference (ISI) and multiple access interferences (MAI) are the major challenges in the mobile communication systems due to transmission over multipath fading channels.In this paper, a proposed receiver structure based on discrete wavelet transform for the downlink multicarrier code division multiple access (DWT-MC-CDMA) is presented to mitigate these interferences.Based on simulation results, the DWT-MC-CDMA receiver provides a better bit error rate (BER) performance than the conventional downlink discrete Fourier transform multi-carrier code division multiple access (DFT-MC-CDMA) receiver.