Practical analysis of codebook design and frequency offset estimation for virtual‐multiple‐input–multiple‐output systems. Issue 6 (1st April 2013)

• Record Type: Journal Article
• Authors: Jiang, Jing; Thompson, John S.; Sun, Hongjian; Grant, Peter M.
• Is Part Of: IET communications. Volume 7:Issue 6(2013)
• Page Start: 585
• Page End: 594
• Publication Date: 2013-04-01
• Subjects: communication complexity -- computational geometry -- diversity reception -- frequency estimation -- MIMO communication -- protocols -- radio receivers -- source coding -- synchronisation -- trees (mathematics) -- vector quantisation -- cooperative communication -- relay networks (telecommunication); communication complexity -- computational geometry -- diversity reception -- frequency estimation -- MIMO communication -- protocols -- radio receivers -- source coding -- synchronisation -- trees (mathematics) -- vector quantisation -- cooperative communication -- relay networks (telecommunication); clock synchronisation -- virtual MIMO system -- CFO -- performance complexity tradeoff -- TSVQ -- encoding complexity -- tree structure VQ -- Voronoi vector quantisation -- carrier frequency offset -- relay -- source coding technique -- CF cooperation -- point‐to‐point MIMO wireless system -- compress and forward protocol -- receiver side cooperation -- frequency offset estimation -- codebook design -- multiple input multiple output; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2012.0345
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : A virtual‐multiple‐input–multiple‐output (MIMO) wireless system using the receiver‐side cooperation with the compress‐and‐forward (CF) protocol, is an alternative to a point‐to‐point MIMO system, when a single receiver is not equipped with multiple antennas. It is evident that the practicality of CF cooperation will be greatly enhanced if an efficient source coding technique can be used at the relay. It is even more desirable that CF cooperation should not be unduly sensitive to carrier frequency offsets (CFOs). This study presents a practical study of these two issues. Firstly, codebook designs of the Voronoi vector quantisation (VQ) and the tree‐structure VQ (TSVQ) to enable CF cooperation at the relay are described. A comparison in terms of the codebook design and encoding complexity is analysed. It is shown that the TSVQ is much simpler to design and operate, and can achieve a favourable performance‐complexity tradeoff. Furthermore, this study demonstrates that CFO can lead to significant performance degradation for the virtual‐MIMO system. To overcome this, it is proposed to maintain clock synchronisation and jointly estimate the CFO between the relay and the destination. This approach is shown to provide a significant performance improvement.