@inproceedings{d1051f1a51de4d96bee483808031fad0,
title = "Iterative detection for OFDMA uplink with frequency offsets",
abstract = "In this work, we propose an iterative algorithm for the detection of transmitted symbols at the uplink of an orthogonal frequency-division multiple access (OFDMA) system. The algorithm allows distinct frequency-offsets (FO)s from each user that cause self- and multiple-access-interference. The proposed algorithm squeezes the interference of subcarrier k into 2D +1 nearby subcarriers by preprocessing the received signal, which yields a banded structure interference matrix. This banded structure is exploited to realize a low complexity iterative softinterference- cancellation minimum mean-squared error (SICMMSE) equalizer that can be used in Turbo equalization. Simulation results show that the bit-error-rate (BER) performance of the proposed algorithm outperforms existing detection algorithms and is very much close to the zero-FO frequencydomain-equalization (zero-FO-FDE) at low computational cost.",
keywords = "Iterative MMSE equalizer, OFDMA",
author = "S. Ahmed and Li Zhang",
year = "2009",
doi = "10.1109/WCNC.2009.4917764",
language = "English (US)",
isbn = "9781424429486",
series = "IEEE Wireless Communications and Networking Conference, WCNC",
booktitle = "2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 - Proceedings",
note = "2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 ; Conference date: 05-04-2009 Through 08-04-2009",
}