Differential demodulation of OFDM based on SOM

Authors:
Xuming Li;Lenan Wu
Affiliations:
Department of Radio Engineering, Southeast University, Nanjing, Jiangsu, China;Department of Radio Engineering, Southeast University, Nanjing, Jiangsu, China
Venue:
ICNC'05 Proceedings of the First international conference on Advances in Natural Computation - Volume Part II
Year:
2005

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Intercarrier interference suppression and channel estimation for OFDM systems in time-varying frequency-selective fading channels

IEEE Transactions on Consumer Electronics

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Abstract

In this paper, a novel differential demodulator for OFDM combining traditional differential demodulation with neural computation has been introduced for differential detection. Simulations using a two-path channel model and M-ary differential phase shift keying (MDPSK) modulation have been run to investigate the performance characteristics of the proposed scheme. The results show that it adapts very well to channel conditions with both strong delay and Doppler spread. The new structures are superior when compared to the traditional differential demodulation in frequency selective fast fading channels without any extra computing complexity.