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EM-based Semi-blind Channel Estimation in AF Two-Way Relay Networks
Saeed Abdallah, Ioannis N. Psaromiligkos · 2013-04-24 · via cs.IT updates on arXiv.org

We propose an expectation maximization (EM)-based algorithm for semi-blind channel estimation of reciprocal channels in amplify-and-forward (AF) two-way relay networks (TWRNs). By incorporating both data samples and pilots into the estimation, the proposed algorithm provides substantially higher accuracy than the conventional training-based approach. Furthermore, the proposed algorithm has a linear computational complexity per iteration and converges after a small number of iterations.

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