Frequency domain channel estimation for cooperative communication networks

Authors:
Aris S. Lalos;Athanasios A. Rontogiannis;Kostas Berberidis
Affiliations:
Department of Computer Engineering and Informatics and RACTI/RU8, University of Patras, Rio-Patras, Greece;Institute for Space Applications and Remote Sensing, National Observatory of Athens, Athens, Greece;Department of Computer Engineering and Informatics and RACTI/RU8, University of Patras, Rio-Patras, Greece
Venue:
IEEE Transactions on Signal Processing
Year:
2010

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Abstract

In this correspondence, we deal with the problem of channel estimation in amplify-and-forward (AF) wideband cooperative relay-based networks. Two types of frequency domain channel estimation techniques are proposed and analyzed. First, a training based technique is presented for which an optimal pilot placement and power allocation strategy is described.Second, hybrid techniques are introduced in which both training as well as channel output correlation information is utilized for channel estimation. A theoretical performance study of the proposed algorithms is presented and closed-form expressions for the mean squared channel estimation error are provided. The presented theoretical analysis is verified via extensive Monte Carlo simulations.