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ICASSP
2011
IEEE

Blind channel estimation for MPSK-based amplify-and-forward two-way relaying

9 years 3 months ago
Blind channel estimation for MPSK-based amplify-and-forward two-way relaying
We consider the problem of channel estimation for amplify-andforward (AF) two-way relay networks (TWRNs). The majority of works on this problem develop pilot-based algorithms that allocate significant resources for training. We will show in this work that such overhead is not necessary when the terminals employ M-ary phase-shift keying (M-PSK). Using the constant-modulus nature of the transmitted symbols, we develop a relaxed blind maximumlikelihood (ML) channel estimator. We study the performance of the ML estimator in the high SNR and large sample-size scenarios, demonstrating that it performs well in both cases. As a benchmark, we also present and analyze an intuitive low-complexity estimator based on sample-averaging. Simulation studies are used to compare the mean-squared error performance of the two algorithms.
Saeed Abdallah, Ioannis N. Psaromiligkos
Added 20 Aug 2011
Updated 20 Aug 2011
Type Journal
Year 2011
Where ICASSP
Authors Saeed Abdallah, Ioannis N. Psaromiligkos
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