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.
Keywords: WLAN, IEEE 802.11a, OFDM, MC-CDMA, Rayleigh channel
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ABOUT THE AUTHORS
Nacera Larbi
Nacera Larbi is a researcher in Space Techniques Center (CTS), Algeria. As a member of power system research group and ALSAT-2 team (second Algerian satellite), her field of interests are focused on power electronics for micro satellites, power subsystems design and multiuser detection in the context of mobile communication using the combination of OFDM/CDMA. Nacera LARBI received her bachelor degree in electronics in 1998, from Oran University of Science and Technology (USTO - Algeria), and her master degree in space technologies in 2002, from the Space Techniques Center, Algeria. She has 9 years experience on satellites power subsystem. Currently, she is pursuing her Ph.D. degree in the department of Electronics at the USTO University, Algeria.
Fatima Debbat
Fatima Debbat received his bachelor degree, in 1996, from Oran University of Science and Technology USTO, and a master degree in space technologies, in 2002, from the Space Techniques Center (CTS) Algeria and Ph. D. degree in electronics, in 2007, from University of Telemcen, Algeria. She is currently a professor at Department of Computer Science, Mascara University, Algeria. Her current research interest covers Artificial intelligence applications, optimization, and wireless network.
A. Boudghen Stambouli
Electronics Department - Faculty of Electrical and Electronic-University of Oran - USTO, Oran 31000-Algeria
Nacera Larbi
Nacera Larbi is a researcher in Space Techniques Center (CTS), Algeria. As a member of power system research group and ALSAT-2 team (second Algerian satellite), her field of interests are focused on power electronics for micro satellites, power subsystems design and multiuser detection in the context of mobile communication using the combination of OFDM/CDMA. Nacera LARBI received her bachelor degree in electronics in 1998, from Oran University of Science and Technology (USTO - Algeria), and her master degree in space technologies in 2002, from the Space Techniques Center, Algeria. She has 9 years experience on satellites power subsystem. Currently, she is pursuing her Ph.D. degree in the department of Electronics at the USTO University, Algeria.
Fatima Debbat
Fatima Debbat received his bachelor degree, in 1996, from Oran University of Science and Technology USTO, and a master degree in space technologies, in 2002, from the Space Techniques Center (CTS) Algeria and Ph. D. degree in electronics, in 2007, from University of Telemcen, Algeria. She is currently a professor at Department of Computer Science, Mascara University, Algeria. Her current research interest covers Artificial intelligence applications, optimization, and wireless network.
A. Boudghen Stambouli
Electronics Department - Faculty of Electrical and Electronic-University of Oran - USTO, Oran 31000-Algeria
