期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2014
卷号：68
期号：2
出版社：Journal of Theoretical and Applied
摘要：It is well known that sequential decoding techniques such as Enhanced Maximum Likelihood sequential decoding (EMLSD) technique can obtain significant performance improvement over conventional decoding techniques in multicarrier direct sequence Code Division Multiple Access (MC-DS-CDMA) systems. Due to its simplicity and usefulness the EMLSD has received significant attention for several years. In this proposed work, three contributions are done for evaluation of the performance of the Multicarrier CDMA receiver. An expression is derived for Bit Error Rate (BER) with arbitrary spreading gain and Signal to Noise Ratio (SNR) requirements. The performance of maximum likelihood decoder under various ordering criteria is then examined based on spreading, path loss and SNR/BER requirement. A set of frequencies is then obtained using a multiuser interference cancellation algorithm. These subcarrier frequencies are very near the optimum in terms of minimizing error rate, thereby increasing the number of users.
关键词：EMLSD (Enhanced Maximum Likelihood Sequential Decoding); MUSIC (Multiple Successive Interference Cancellation)
