한국전자파학회지:전자파기술 (The Proceeding of the Korean Institute of Electromagnetic Engineering and Science)
- 제6권3호
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- Pages.75-79
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- 1995
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- 1738-9712(pISSN)
레일레이 페이딩채널에서 선택성 결합방식의 공간다이버시티를 이용한 QAM의 심벌오율
Symbol Error Rates of QAM with Selection Combining Space Diversity in Rayleigh Fading Channels
초록
This paper derives the symbol error rate (SER) for quadrature amplitude modulation (QAM) with L-fold selection combining (SC) space diversity in Rayleigh fading channel. No analysis has been reported yet for theoretical SER performance of QAM with SC space diversity in Rayleigh fading channels. The formula is obtained by averaging the symbol error probability of M-ary QAM in an additive white Gaussian noise channel over the distribution of the maximum signal-to-noise ratio among all of the diversity channels. By giving the order of diversity, L, and the number of signal points, M, we have been able to obtain the SER performance of QAM with general SC space diversity. Analytical results show that the probability of error decreases with the order of diversity. We can also see that the incremental diversity gain per additional diversity decreases as the number of branches becomes larger.
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