MC-CDMA Scheme in Wi-Fi Environment

The combination of OFDM and Code Division Multiple Access (CDMA) is seen as an attractive and practical solution to enhance the throughput and/or robustness for future high-speed indoor WLANs. The multi-path Rayleigh channel represents a hostile environment for WLANs communication. So, we have proposed the MC-CDMA system to overcome the impact of this kind of wireless channel. The focus of this article is to simulate a modified physical layer (PHY) based on the IEEE 802.11a combined with a stage of spread spectrum. This modified layer particularly concentrates on IEEE 802.11a standard. Basically, the proposed schemes can be split in different types depending on the CDMA code used. We investigated the modified physical layer performance on the basis of Bit Error Rate (BER) and Signal-to-Noise Ratio (SNR). The numerical results show that the MC-CDMA is a powerful multi-carrier multiple access technology.