Abstract
This paper studies the performance of switch and stay combining (SSC) diversity receivers operating over correlated Ricean fading satellite channels. Using an infinite series representation for the bivariate Ricean probability density function (PDF), the PDF of the SSC output signal-to-noise ratio (SNR) is derived. Capitalizing on this PDF, analytical expressions for the corresponding cumulative distribution function (CDF), themoments of the output SNR, the moments generating function (MGF), and the average channel capacity (CC) are derived. Furthermore, by considering several families of modulated signals, analytical expressions for the average symbol error probability (ASEP) for the diversity receivers under consideration are obtained. The theoretical analysis is accompanied by representative performance evaluation results, including average output SNR (ASNR), amount of fading (AoF), outage probability (Pout), average bit error probability (ABEP), and average CC, which have been obtained by numerical techniques. The validity of some of these performance evaluation results has been verified by comparing them with previously known results obtained for uncorrelated Ricean fading channels.
Highlights
The mobile terrestrial and satellite communication channel is dynamic due to multipath fading propagation, having a strong negative impact on the average bit error probability (ABEP) of any modulation scheme [1]
The most important and widely used diversity reception methods employed in digital communication receivers are maximal-ratio combining (MRC), equal-gain combining (EGC), selection combining (SC), and switch and stay combining (SSC) [2]
For SSC diversity considered in this paper, the receiver selects a particular branch until its signal-to-noise ratio (SNR) drops below a predetermined threshold
Summary
The mobile terrestrial and satellite communication channel is dynamic due to multipath fading propagation, having a strong negative impact on the average bit error probability (ABEP) of any modulation scheme [1]. In [12], infinite series expressions for the capacity of dual-branch MRC, EGC, SC, and SSC diversity receivers over Nakagami-m fading channels have been derived. One of the first attempts to investigate the performance of SSC diversity receivers operating over independent and correlated identical distributed Ricean fading channels was made in [14] In this reference only noncoherent frequency shift keying (NCFSK) modulation was considered and its ABEP has been derived in an integral representation form. Analytical expressions for the average symbol error probability (ASEP) of several modulation schemes will be obtained Capitalizing on these expressions, a detailed performance analysis for the Pout, ASNR, AoF, and ASEP/ABEP will be presented.
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