Abstract
In frequency selective fading channel, the STBC-OFDM system achieves optimal performance. Unfortunately, the STBC-OFDM system performance is degraded due to co-channel interference (CCI) in time selective fading channel. To suppress CCI effects various signal detection techniques are investigated including diagonalized zero forcing detection (DZFD), successive interference cancellation (SIC), decision feedback detection (DFD), List-SIC, and maximum likelihood (ML) methods. Although ML detection technique achieves optimal performance, it results into very high computational complexity. In this paper, the STBC-OFDM systems performance is analyzed under the influence of time selective channels. In particular, we proposed a suboptimal ordered iterative decision feedback (OIDF) detection technique based on dual combining scheme of DZFD and SIC with iterations. Finally, the performance evaluation is carried out for proposed OIDF method and various standard conventional signal detection methods based on complexity and bit error rate (BER). The results show that BER performance of OIDF method nearly approaches to ML method with substantial reduction in complexity.
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Patra, J.P., Pradhan, B.B., Prasad, S.T., Singh, P. (2023). An Efficient Signal Detection Technique for STBC-OFDM in Fast Fading Channel. In: Chaubey, N., Thampi, S.M., Jhanjhi, N.Z., Parikh, S., Amin, K. (eds) Computing Science, Communication and Security. COMS2 2023. Communications in Computer and Information Science, vol 1861. Springer, Cham. https://doi.org/10.1007/978-3-031-40564-8_1
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