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Proceedings Paper

Turbo MMSE equalizer for spread OFDM signal detection
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Paper Abstract

Symbol spread OFDM technique has been introduced to improve diversity performance of the conventional OFDM system in the frequency selective fading channel, where, in this technique, every data symbol is mod- ulated using all OFDM subcarriers. Linear Minimum Mean Square Error (MMSE) equalizer is widely used in spread OFDM signal detection because of its low complexity compared to optimal equalizers such as Maximum Likelihood (ML).1 In this paper we introduce turbo equalization based receiver for detecting symbol spread OFDM signal in which MMSE equalizer and channel decoder exchange soft information in an iterative fashion. Bit Error Rate (BER) performance is investigated with both full and partial spread scenarios and also with and without channel decoding. Simulation results show improved performance especially at low SNR regime and when partially spread OFDM scenario is used.

Paper Details

Date Published: 28 May 2013
PDF: 8 pages
Proc. SPIE 8753, Wireless Sensing, Localization, and Processing VIII, 875308 (28 May 2013); doi: 10.1117/12.2018188
Show Author Affiliations
Ali Elghariani, Purdue Univ. (United States)
Michael D. Zoltowski, Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 8753:
Wireless Sensing, Localization, and Processing VIII
Sohail A. Dianat; Michael David Zoltowski, Editor(s)

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