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Journal of Electrical and Computer Engineering - Volume 2016 2016, Article ID 9304597, 8 pages -

Research Article

Department of Electronics and Communication Engineering, Jaypee University of Information Technology, Waknaghat, Solan 173234, India

Department of Electronics and Communication Engineering, Chandigarh College of Engineering and Technology, Chandigarh 160019, India

Received 19 July 2016; Accepted 25 October 2016

Academic Editor: George Tsoulos

Copyright © 2016 Keerti Tiwari et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present capacity analysis for multiple-input multiple-output MIMO system under a low signal-to-noise ratio SNR regime. We have selected a composite fading channel that considers Weibull fading for multipath and gamma fading for shadowing. We have presented the analysis in a detailed form for three different techniques, namely, spatial multiplexing SM with optimal detection, SM with minimum mean square error MMSE detection, and orthogonal space-time block codes OSTBC. Because capacity analysis at arbitrary signal-to-noise SNR is stringent, a low SNR regime is considered to achieve a positive rate and wideband slope. The improvement is the result of minimizing energy per information bit . For the first time, closed-form expressions are evaluated for the capacity of MIMO systems at low SNR under WG fading channels which facilitate the performance comparison for proposed techniques.





Autor: Keerti Tiwari, Davinder S. Saini, and Sunil V. Bhooshan

Fuente: https://www.hindawi.com/



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