Performance Analysis of the FH/MFSK System using the Selection Diversity in Nakagami Fading Channel

나카가미 페이딩 채널에서 선택 합성 다이버시티를 적용한 FH/MFSK 시스템의 성능분석

  • Lee, Chung-Seong (Radio Communication Laboratory(RCLAB),Dept.of Computer & Communication Eng.,Chungbuk National University) ;
  • Kim, Hang-Rae (Radio Communication Laboratory(RCLAB),Dept.of Computer & Communication Eng.,Chungbuk National University) ;
  • Kim, Nam (Radio Communication Laboratory(RCLAB),Dept.of Computer & Communication Eng.,Chungbuk National University)
  • 이충성 (충북대학교 정보통신공학과 전파통신연구실) ;
  • 김항래 (충북대학교 정보통신공학과 전파통신연구실) ;
  • 김남 (충북대학교 정보통신공학과 전파통신연구실)
  • Published : 2000.10.01

Abstract

In this paper, the system performance with the selection diversity, which is applied to the FH/MFSK system in Nakagami fading channel, is analyzed. The deletion probability is derived from the received signal to noise ratio(SNR) after selection combining and the parameters such as the number of users(M), SNR, Nakagami fading figure(m), and the number of diversity branches(D) is used for the performance analysis of the FH/MFSK system. Assuming that m set 1, it is observed that the bit error rate(BER) is 1.0$\times$$10^{-3}$ and 1.0$\times$$10^{-4}$ at D =1(no diversity) and D=2, respectively, and then is decreased by 10 times. Assuming that m set 2, it is also shown that the BER has a constant value although D is increased. In the case of D=2, the system capacity is more 75% and 20% than that considering no diversity at SNR=15 dB and 25 dB, respectively.

본 논문에서는 나카가미 패이딩 채널에서 FH/MFSK 시스템에 선택 다이버시티를 적용하였을 경우의 시스템 성능을 분석한다. 선택 합성(selection combining)후의 신호대 잡음비(SNR)로부터 제거확률을 유도하고 FH/MFSK 시스템의 성분분석을 위해 사용자수(M), SNR, 나카가미 페이딩(m), 다이버시티 가지의 수(D)와 같은 파라메더들을 사용한다. m이 1인 경우, 비트에러율(BER)은 각각 D=1에서 1.0$\times$10-3이고 D=2에서 1.0$\times$10-4으로 10배만큼 감소함을 알 수 있다. m이 2인 경우, BER은 D가 증가하더라도 일정한 값을 갖는다는 것을 또한 알 수 있다. D가 2인 경우, SNR이 15dB와 25dB일 때의 시스템 용량은 다이버시티를 고려하지 않은 용량보다 각각 75%와 20% 증가된다.

Keywords

References

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