A single-carrier QUASI-orthogonal transmission scheme for asynchronous cooperative relay networks

Hayes, M, Chambers, JA and Macleod, MD (2009) A single-carrier QUASI-orthogonal transmission scheme for asynchronous cooperative relay networks

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Abstract

A single-carrier quasi-orthogonal distributed block space-time coding scheme for a wireless collaborative network with one relaying stage composed of four nodes is proposed. This block quasi-orthogonal design can attain full diversity and maximum rate, and is based on simple amplify-and-forward processing at the relay nodes. A cyclic prefix is introduced into the block transmission to overcome channel delay mismatches in the paths through the four relays. In single-carrier operation, these delays are shown to introduce inter-symbol-interference (ISI) in the destination signal. A linear pre-processing scheme is therefore designed to mitigate this ISI through maximizing signal-to-interference-plus-noise ratio (SINR) at the receiver in combination with iterative equalization. To reduce the computational complexity of this scheme the underlying interference matrices are rendered sparse by the pre-processing operation. Simulation studies confirm the improvement in SINR of the proposed approach as compared to one which only uses rectangular pre-windowing. © EURASIP, 2009.

Item Type:	Conference or Workshop Item (UNSPECIFIED)
Divisions :	Surrey research (other units)
Authors :	Name Email ORCID Hayes, M Chambers, JA j.a.chambers@surrey.ac.uk Macleod, MD
Date :	1 December 2009
Depositing User :	Symplectic Elements
Date Deposited :	17 May 2017 13:25
Last Modified :	23 Jan 2020 18:34
URI:	http://epubs.surrey.ac.uk/id/eprint/839167

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