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Transceiver Design for Distributed STBC Based AF Cooperative Networks in the Presence of Timing and Frequency Offsets
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2013 (English)In: IEEE Transactions on Signal Processing, ISSN 1053-587X, E-ISSN 1941-0476, Vol. 61, no 12, 3143-3158 p.Article in journal (Refereed) Published
Abstract [en]

In multi-relay cooperative systems, the signal at the destination is affected by impairments such as multiple channel gains, multiple timing offsets (MTOs), and multiple carrier frequency offsets (MCFOs). In this paper we account for all these impairments and propose a new transceiver structure at the relays and a novel receiver design at the destination in distributed space-time block code (DSTBC) based amplify-and-forward (AF) cooperative networks. The Cramer-Rao lower bounds and a least squares (LS) estimator for the multi-parameter estimation problem are derived. In order to significantly reduce the receiver complexity at the destination, a differential evolution (DE) based estimation algorithm is applied and the initialization and constraints for the convergence of the proposed DE algorithm are investigated. In order to detect the signal from multiple relays in the presence of unknown channels, MTOs, and MCFOs, novel optimal and sub-optimal minimum mean-square error receiver designs at the destination node are proposed. Simulation results show that the proposed estimation and compensation methods achieve full diversity gain in the presence of channel and synchronization impairments in multi-relay AF cooperative networks.

Place, publisher, year, edition, pages
2013. Vol. 61, no 12, 3143-3158 p.
Keyword [en]
cooperative communication;estimation theory;evolutionary computation;least squares approximations;parameter estimation;radio transceivers;relay networks (telecommunication);wireless channels;AF cooperative networks;Cramér-Rao lower bounds;DE;DSTBC;LS estimator;MCFO;MTO;amplify-and-forward cooperative networks;differential evolution;distributed STBC;distributed space-time block code;estimation algorithm;frequency offsets;least squares estimator;multiparameter estimation;multiple carrier frequency offsets;multiple channel gains;multiple timing offsets;multirelay cooperative systems;receiver complexity;timing offsets;transceiver design;transceiver structure;Cooperative communication;Cramér-Rao lower bound (CRLB);amplify-and-forward (AF);differential evolution (DE);distributed space-time block code (DSTBC);receiver design
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-136556DOI: 10.1109/TSP.2013.2258015ISI: 000320135200011Scopus ID: 2-s2.0-84878283004OAI: oai:DiVA.org:kth-136556DiVA: diva2:676382
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QC 20140613

Available from: 2013-12-05 Created: 2013-12-05 Last updated: 2017-12-06Bibliographically approved

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Ottersten, Björn

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