IEICE Transactions on Communications
Online ISSN : 1745-1345
Print ISSN : 0916-8516

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Delay-Amplify-and-Forward Beamforming for Single-Carrier Relay NetworksWith Frequency Selective Channels
Hiroki TAKAHASHITeruyuki MIYAJIMA
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JOURNAL RESTRICTED ACCESS Advance online publication

Article ID: 2016EBP3391

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Abstract

In this paper, we propose a relaying strategy for single-carrier relay networks with frequency selective channels, where each relay node delays its received signal before amplify-and-forward processing it. We propose a computationally efficient delay design method which reduces the number of delay candidates. To further reduce computational complexity, we develop a simplified delay design method which reduces the number of weight computations. Also, we extend the design method to the case where only partial channel state information of relay-to-destination channels is available. Simulation results show that the proposed relaying strategy outperforms a conventional amplify-and-forward relaying strategy and achieves the performance close to that of a more complex filter-and-forward relaying strategy. It is also shown that the proposed delay design method achieves near-optimum performance.

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© 2017 The Institute of Electronics, Information and Communication Engineers
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