Open AccessGeneralised prefix for space–time block‐coded orthogonal frequency division multiplexing wireless systems over correlated multiple‐input multiple‐output channels
Author(s) -
Yıldız Hakan,
Acar Yusuf,
Cooklev Todor,
Dogan Hakan
Publication year - 2014
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2013.1166
Subject(s) - cyclic prefix , orthogonal frequency division multiplexing , block code , mimo ofdm , mimo , space–time block code , circular convolution , computer science , convolution (computer science) , algorithm , skew , multiplexing , electronic engineering , channel (broadcasting) , mathematics , telecommunications , decoding methods , engineering , fourier transform , fourier analysis , mathematical analysis , machine learning , artificial neural network , fractional fourier transform
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.