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2011, vol. 10, iss. 1, pp. 83-95
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Bit error rate for SSC/MRC combiner at two time instants in the presence of log-normal fading
Verovatnoća greške SSC/MRC kombinera u dva trenutka vremena u prisustvu log-normalnog fedinga
Project: Development, realization, optimization and monitoring of a 5kWp grid-connected modular Sun-tracking photovoltaic system (MESTD - 33035)
Development of new information and communication technologies, based on advanced mathematical methods, with applications in medicine, telecommunications, power systems, protection of national heritage and education (MESTD - 44006)
Ključne reči: diversiti prijem; združena funkcija gustine verovatnoće; log-normalni feding; SSC kombinovanje; MRC kombinovanje; dva vremenska trenutka; verovatnoća greške
Abstract
In this paper, the performances of the Switch and Stay Combining/Maximal Ratio Combining (SSC/MRC) combiner output signal at two time instants is determined. The SSC and MRC combiners with two branches are considered. The presence of the log-normal fading at the input is observed. The probability density function (PDF) at the output of the combiner is obtained. Bit error rate (BER) for the special case of the binary phase swift keying (BPSK) modulation is derived. The results are shown graphically to emphasize better performances of the SSC/MRC combiner with regard to classical SSC and MRC combiners at one time instant.
Sažetak
U ovom radu razmatrane su performanse SSC/MRC kombinera (Switch and Stay Combining/Maximal Ratio Combining) u dva vremenska trenutka. Razmatrani su SSC i MRC kombineri sa dve grane u prisustvu log-normalnog fedinga. Određena je funkcija gustine verovatnoće (PDF) na izlazu kombinera i na osnovu nje verovatnoća greške (BER) za slučaj binarne fazne modulacije (BPSK). Rezultati su prikazani grafički da bi se istakle bolje performanse SSC/MRC kombinera u odnosu na klasične SSC i MRC kombineri u jednom vremenskom trenutku.
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