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http://dx.doi.org/10.7840/KICS.2012.37A.1.17

Interference Mitigation Technique for OFDMA-based Mesh Networks in Doubly Selective Channels  

Park, Chang-Hwan (School of Electrical & Electronic Engineering, Chung-Ang University)
Kong, Mi-Kyung (School of Electrical & Electronic Engineering, Chung-Ang University)
Cho, Yong-Soo (School of Electrical & Electronic Engineering, Chung-Ang University)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37, no.1A, 2012 , pp. 17-24 More about this Journal
Abstract
In this paper, we described a received signal model in terms of the starting point of FFT window and derive a post-detection SINR for the receiver with MMSE filter and the corresponding filter coefficients in order to mitigate the effects of interferences caused by time and frequency selective fading channels and time difference of arrival (TDoA) in OFDMA-based Mesh Networks. In addition, we proposed an MMSE Bidirectional Successive Detection (BSD) technique which can suppress the effects of interferences among multi-nodes without any redundant FFT operations. It was shown by simulation that the proposed interference suppression technique has not an error floor at higher average SNR than 30dB in terms of 64QAM uncoded BER contrary to the conventional techniques.
Keywords
OFDMA; Wireless Mesh Networks; TDoA; ICI; ISI;
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