A low complexity approach for spread OFDM signal detection

Ali Elghariani; Michael Zoltowski

doi:10.1117/12.2050697

21 May 2014 A low complexity approach for spread OFDM signal detection

Ali Elghariani, Michael Zoltowski

Proceedings Volume 9103, Wireless Sensing, Localization, and Processing IX; 91030B (2014) https://doi.org/10.1117/12.2050697
Event: SPIE Sensing Technology + Applications, 2014, Baltimore, MD, United States

Abstract

In this paper, a high-dimensional detection problem of single input single output (SISO) spread OFDM system is attempted using low complexity approach. A combination of signal processing procedures is introduced to provide a low complexity detection algorithm with improved performance compared to existing linear detectors such as Minimum Mean Square Error (MMSE). Soft output MMSE is implemented first to provide a reliability measure of all bits in the received vector using an approximated Log Likelihood Ratio (LLR) information. The most reliable bits are deemed correctly received and the least reliable bits undergo Branch and Bound (BB) detection process in a sequential manner. Within this block of unreliable bits, BB starts with the most unreliable bits and then the second most unreliable bits and so on. Simulation results show that the proposed technique provides improved performance with a significant reduction in the computational complexity.

Citation Download Citation

Ali Elghariani and Michael Zoltowski "A low complexity approach for spread OFDM signal detection", Proc. SPIE 9103, Wireless Sensing, Localization, and Processing IX, 91030B (21 May 2014); https://doi.org/10.1117/12.2050697

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