Complexity Reduction of Maximum-Likelihood Multiuser Detection (ML-MUD) Receivers with Carrier Interferometry Codes in MC-CDMA

—We propose to use carrier interferometry (CI) codes to reduce the complexity of the maximumlikelihood multiuser-detection (ML-MUD) receiver in MC-CDMA systems with carrier frequency offsets (CFOs). Complexity reduction is achieved by exploiting the sparsity of the cross-correlation matrix of CI codes. It is shown that, for a fully-loaded MC-CDMA with spread gain N over a multipath channel with length L, the complexity of the ML-MUD receiver grows exponentially with 2L−1 (instead of N), where L N in a typical setting. Moreover, an upper bound for the minimum error probability is derived. Finally, simulation results are given to corroborate theoretical results.

• Type: Conference
• Year: 2008
• Where: ICC
• Authors: Layla Tadjpour, Shang-Ho Tsai, C. C. Jay Kuo
• Keywords: Carrier Frequency Offsets, Communications, ICC 2008, MC-CDMA Systems, Minimum Error Probability