Design and FPGA Implementation of Enhanced MC-MC-CDMA System Based on Proposed M-Ary BPSK Multicode System

Design and FPGA Implementation of Enhanced MC-MC-CDMA System Based on Proposed M-Ary BPSK Multicode System
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© 2023 by IJETT Journal
Volume-71 Issue-7
Year of Publication : 2023
Author : Hayder Fadhil Abdulsada, Samir Jasim Mohammed
DOI : 10.14445/22315381/IJETT-V71I7P230

How to Cite?

Hayder Fadhil Abdulsada, Samir Jasim Mohammed, "Design and FPGA Implementation of Enhanced MC-MC-CDMA System Based on Proposed M-Ary BPSK Multicode System," International Journal of Engineering Trends and Technology, vol. 71, no. 7, pp. 315-325, 2023. Crossref, https://doi.org/10.14445/22315381/IJETT-V71I7P230

Abstract
In recent years, wireless communication has achieved significant advancements. There are many services for information transmission with high data rates and high quality, such as the Multicode-Multicarrier Code Division Multiple Access (MC-MC-CDMA). The proposed M-ary BPSK CDMA Multicode system uses to enhance the MC-MC-CDMA. The enhanced MC-MC-CDMA has been designed, simulated, and implemented in the Kintex-7 KC705 FPGA board; then, it is compared with the classical MC-MC-CDMA. The two systems are simulated in the Additive white Gaussian noise (AWGN) and multipath Rayleigh fading channels using orthogonal Hadamard spreading codes. The proposed M-ary BPSK Multicode CDMA system is improved in terms of its constellation points that are used in the mapping process, where these points have been selected with a large average sum of Euclidian distances between them to reduce the interferences during data transmission. The enhanced MC-MC-CDMA depends on combining the proposed M-ary BPSK Multicode system and the multicarrier CDMA system. The results show that the enhanced MC-MC-CDMA gives better bit error rate (BER) performance than the classical MC-MC-CDMA in the case of 2-ary and 4-ary mapping schemes, and they have equal performance in the case of M=8 and 16 at the same code length. Moreover, the enhanced MC-MC-CDMA permits more users to access it than the MC-MC-CDMA when using equal spreading code lengths.

Keywords
Wireless Communication, Multicode CDMA, Multicarrier CDMA, MC-MC-CDMA, Enhanced MC-MC-CDMA.

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