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ISSN: 2332-0796

Journal of Electrical & Electronic Systems
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Review Article

A Study on Orthogonal Space-time Block Codes for Cooperative Function

Sabran ON*

Department of Electronics and Communication Engineering, Bhabha College of Engineering, Bhopal, Madhya Pradesh, India

*Corresponding Author:
Sabran ON
Department of Electronics and Communication Engineering
Bhabha College of Engineering, Bhopal
Madhya Pradesh, India
Tel: +91-9203893960
E-mail: [email protected]

Received Date: August 06, 2015; Accepted Date: August 28, 2015; Published Date: September 15, 2015

Citation: Sabran ON (2015) A Study on Orthogonal Space-time Block Codes for Cooperative Function. J Electr Electron Syst 4:158. doi:10.4172/2332-0796.1000158

Copyright: © 2015 Sabran ON. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Space-time block codes alone generally have little or no coding gain. To extract coding gain, space-time block codes have been previously concatenated with an outer trellis to generate simple and powerful codes, recognized as superorthogonal codes. That work has two main themes: it explores methods and algorithms that generate coding gain in block codes exclusive of a trellis, as glowing as improve the coding gain in the presence of a trellis. At what time an external trellis is obtainable, our results simplify the super-orthogonal codes by finding new code supersets and corresponding set partitioning, resulting in improved coding gain. New algorithms are developed to efficiently build trellises for various full-rate MIMO codes, for that reason they extend the concept of trellis-block MIMO coding beyond orthogonal and quasi-orthogonal codes. In the absence of a trellis, a technique called single-block coded modulation is proposed to improve the coding gain of all varieties of space-time block codes. In that thesis they discuss coded modulation schemes designed for multiple antenna wireless channels without information of the channel at the transmitter. Space-time coding reduces the detrimental effect of channel fading. The space-time receiver takes advantage of diverse propagation paths between transmits and receive antennas to improve the performance of wireless communication. It contains a literature survey of the recent developments in MIMO signaling. The main types of spacetime codes are block and trellis codes. Space-time block codes (STBC) operate on a block of input symbols, producing a matrix output. Space-time block codes do not generally provide coding gain. Their main feature is the provision of diversity with a very simple decoding scheme. Concatenation of orthogonal space-time block codes (OSTBC) with an outer trellis has led to simple and powerful codes, known as super-orthogonal codes or STB-TCM.

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