Generalised prefix for space–time block‐coded orthogonal frequency division multiplexing wireless systems over correlated multiple‐input multiple‐output channels. Issue 9 (1st June 2014)

• Record Type: Journal Article
• Authors: Yıldız, Hakan; Acar, Yusuf; Cooklev, Todor; Dogan, Hakan
• Is Part Of: IET communications. Volume 8:Issue 9(2014)
• Page Start: 1589
• Page End: 1598
• Publication Date: 2014-06-01
• Subjects: space‐time block codes -- MIMO communication -- OFDM modulation -- channel coding -- radio links -- wireless channels -- telecommunication network reliability; generalised prefix -- space‐time block‐coding -- correlated multiple‐input multiple‐output channels -- orthogonal frequency division multiplexing wireless systems -- broadband communication reliability -- wireless links -- MIMO channel -- performance loss -- STBC‐OFDM system -- skew‐circular convolution -- channel state information; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2013.1166
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : Space–time block coding (STBC) orthogonal frequency division multiplexing (OFDM) is known to improve the reliability of broadband communication over wireless links. However, this technique suffers from a performance loss when the multiple‐input multiple‐output (MIMO) channel is correlated. This study addresses this problem. A STBC‐OFDM system is proposed that is based on convolution that is skew‐circular, rather than circular. This skew‐circular convolution leads to one additional degree of freedom. The additional parameter can be optimised leading to improved performance for MIMO channels that are correlated. The skew‐circular convolution is achieved via the introduction of a generalised prefix. The simulation results are given, illustrating the performance improvement of the proposed STBC‐OFDM system. Furthermore, the proposed system is shown to be robust when channel state information is known not precisely, but imperfectly.