A Survey on Channel Estimation for OFDM-IDMA Receivers Systems
نویسندگان
چکیده
In this paper, various channel estimation techniques for iterative receivers are compared for OFDMIDMA system. Pilot –assisted based, semi-blind estimation, blind estimation and Decision –directed channel estimations techniques are considered and there comparisons are presented. The considered estimation techniques differ in terms of complexity, as well as performance. The main contribution of this paper is to give an overview of different channel estimation techniques OFDM-IDMA systems. There is no single channel estimator providing the best tradeoff and our comparison shows the system load and SNR influence the estimator choice. KeywordsBER-Bit Error Rate, CIR-Channel Impulse Response, Channel Estimation Techniques, Fading channels, IDMA-Interleave Division Multiple Access , OFDM-Orthogonal Frequency Division Multiplexing
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