On the Capacity of MIMO Weibull-Gamma Fading Channels in Low SNR Regime
| Autor: | Keerti Tiwari, Davinder S. Saini, Sunil V. Bhooshan |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Journal of Electrical and Computer Engineering, Vol 2016 (2016) |
| Druh dokumentu: | article |
| ISSN: | 2090-0147 2090-0155 |
| DOI: | 10.1155/2016/9304597 |
| Popis: | 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 (Eb). 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. |
| Databáze: | Directory of Open Access Journals |
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