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Journal of the Korean Institute of Electromagnetic and Science 2004;4(4):175-182.
New Analysis on the Generalization of SC Systems for the Reception of M-ary Signals over Rayleigh Fading Channels
Jae-Yeun Yoon1, Chang-Hwan Kim2, Yong-Ok Chin3
1Ssangyong Information & Communication Co.
2Information & Telecommunication Research Institute, Hansei University
3Information & Communication Engineering, Kyung Hee University
Abstract
When the M-ary signal experiences the Rayleigh fading, the diversity schemes can reduce the effect of fading since the probability that all the signals components will fade simultaneously is reduced considerably. The symbol error probabilities for various M-ary signals, such as MDPSK(M-ary DPSK) and MPSK(M-ary PSK), are mathematically derived for the Selection Combining 2(SC-2) and Selection Combining 3(SC-3) demodulation system which requires a less complex receiver than Maximum Ratio Combining(MRC). The propagation model used in this paper is the frequency-nonselective slow Rayleigh fading channel corrupted by the Additive White Gaussian Noise(AWGN). The numerical results presented in this paper are expected to provide information for the design of radio system using M-ary modulation method for above mentioned channel environment.
Key words: SC-2, SC-3, Rayleigh Fading, MDPSK, MPSK

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