Abstract
In this article, we investigate the performance of dual-hop amplify-and-forward multiple-input multiple-output relaying system with orthogonal space-time block code transmissions over doubly-correlated Nakagami-m fading channel, where the source, relay, and destination terminals are all equipped with multiple antennas. For two different CSI-assisted relaying schemes, which could be encompassed by a unified model, we provide the compact closed-form expressions for cumulative distribution function, probability density function, moment generating function, and generalized moment (GM) of the instantaneous end-to-end SNR. Besides, the exact analytical expressions for the outage probability (OP) and symbol error rate (SER) and approximate expression for ergodic capacity are also derived. Furthermore, we present the asymptotic expressions for OP and SER in the high SNR regime, from which we gain an insight into the system performance and derive the achievable diversity order and array gain. The analytical expressions are validated by Monte-Carlo simulations.
Highlights
Relaying transmission has attracted great attention due to their considerable advantages over direct transmission, such as extending the coverage, increasing the reliability, and saving the power consumption [1,2,3], and has already been discussed as part of the LTEAdvanced study [4]
It is noteworthy that it’s easy to derive the performance of the dual-hop AF Multiple-input multiple-output (MIMO) relaying system with Orthogonal space-time block code (OSTBC) transmissions over doubly-correlated Rayleigh fading channels based on our analysis results, since the Nakagami-m distribution equals the Rayleigh distribution for m = 1
In order to gain more insight into system performance, we present the asymptotic expression for outage probability (OP) and symbol error rate (SER) in the high SNR regime, and derive the achievable diversity order and array gain of the AF MIMO relaying system
Summary
Relaying transmission has attracted great attention due to their considerable advantages over direct transmission, such as extending the coverage, increasing the reliability, and saving the power consumption [1,2,3], and has already been discussed as part of the LTEAdvanced study [4]. It is noteworthy that it’s easy to derive the performance of the dual-hop AF MIMO relaying system with OSTBC transmissions over doubly-correlated Rayleigh fading channels based on our analysis results, since the Nakagami-m distribution equals the Rayleigh distribution for m = 1. By performing some algebraic manipulations with the help of expression for the definite integral of Bessel function, given in ([21], eq (6.621.3)), the MGF of γ with β = 0 can be derived as shown in (22).
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