1. On the Capacity of MIMO Weibull-Gamma Fading Channels in Low SNR Regime.
- Author
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Tiwari, Keerti, Saini, Davinder S., and Bhooshan, Sunil V.
- Subjects
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MIMO systems , *SIGNAL-to-noise ratio , *RADIO transmitter fading , *WEIBULL distribution , *MULTIPLEXING - 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 (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. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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