• Title, Summary, Keyword: Nakagami

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Performance Analysis of Non-coherent FSK, DPSK and ASK using PDF of the Envelope of the Received Signal in Nakagami Fading Channel (Nakagami 페이딩 채널에서 수신신호 포락선의 pdf를 이용한 비동기 통신 시스팀의 성능 분석)

  • 임채헌;한영열
    • Proceedings of the IEEK Conference
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    • pp.94-97
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    • 1998
  • In this paper we derive the pdf for the envelope of the received signal in Nakagami fading environment. Then, using this pdf we analyze the performance of Noncoherent FSK and DPSK in Nakagami fading channel. For ASK it is difficult to find the threshold value in Nakagami fading we confine our discussion in the special case of m=1, which is in Rayleigh fading.

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Effective Asymptotic SER Performance Analysis for M-PSK and M-DPSK over Rician-Nakagami Fading Channels (Rician-Nakagami 페이딩 채널에서 M-PSK와 M-DPSK 시스템에 대한 효과적인 점근적 심볼 에러 확률 성능 분석)

  • Lee, Hoojin
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.12
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    • pp.2177-2182
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    • 2016
  • Using the existing exact but quite complicated symbol error rate (SER) expressions for M-ary phase shift keying (M-PSK) and M-ary differential phase shift keying (M-DPSK), we derive effective and concise closed-form asymptotic SER formulas especially in Rician-Nakagami fading channels. The derived formulas can be utilized to efficiently verify the achievable error rate performances of M-PSK and M-DPSK systems for the Rician-Nakagami fading environments. In addition, by exploiting the modulation gains directly obtained from the asymptotic SER formulas, we also theoretically demonstrate that M-DPSK suffers an asymptotic SER performance loss of 3.01dB with respect to M-PSK for a given M in Rician-Nakagami fading channels at high signal-to-noise ratio (SNR).

Probability of symbol error for M-ary QAM in nakagami fading channel (나카가미 페이딩 채널에서 M-ary QAM의 심벌 오류 확률)

  • 조경국;윤동원;한영열
    • Journal of the Korean Institute of Telematics and Electronics S
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    • v.34S no.11
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    • pp.9-15
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    • 1997
  • The Nakagami m-distribution is used to model different fading environments and shown to fit experimental resutls more accurately than other distributions. In this paper, the probability of symbol error for M-ary QAM with square signal constellation in frequency-nonselective shlow Nakagami fading and additive white Gaussian noise is derived. When Nakagami fading index is integer, the derived resutls leads to the closed-form of a finite series.

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Performance Evaluation of Block Error of FS MC-CDMA System in Various Nakagami Fading Channels

  • Jin, Ze-Guang;Kang, Heau-Jo
    • Journal of information and communication convergence engineering
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    • v.4 no.4
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    • pp.131-135
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    • 2006
  • In this paper, we discusses that the theoretical analysis is made for the performance of FS MC-CDMA by the aid of the Nakagami fading channels and the block error probabilities of the FS MC-CDMA in Nakagami fading channel are presented. The channel fading speed, slow or fast, is considered in evaluating block error probabilities. The effectiveness of diversity combining in improving block error performance is examined.

Outage Performance for DF Two-Way Relaying with Co-Channel Interference over Nakagami-m Fading

  • Fan, Jinhong;Yuan, Chaowei
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.9 no.11
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    • pp.4469-4482
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    • 2015
  • In this paper, we investigate the outage performance of a two-way decode-and-forward relaying network in an interference-limited Nakagami-m fading environment. More specifically, assuming the presence of Nakagami-m faded multiple co-channel interferers at the source/destination terminals, the closed-form approximate expression for the outage probability is derived by using moment-based estimators attaining the appropriate Nakagami-m fading parameter. Simulation results demonstrate that our analytical result is in excellent agreement with the Monte Carlo simulation.

Further Analysis on Selective Diversity Reception for Detection of M-ary Signals Over Nakagami Fading Channels

  • Na, Seung-Gwan;Kim, Chang-Hwan;Chin, Yong-Ohk
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.30 no.11C
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    • pp.1045-1052
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    • 2005
  • The symbol error probability of M-ary PSK (MPSK) and QAM (MQAM) systems using the branch with the largest signal-to-noise ratio (SNR) at the output of L-branch selection combining (SC) in frequency-nonselective slow Nakagami fading channels with an additive white Gaussian noise (AWGN) is derived theoretically For integer values of the Nakagami fading parameter m, the general formula for evaluating symbol error rate (SER) of MPSK signals in the independent branch diversity system comprises numerical analyses with the integral-form expressions. An exact closed-form SER performance of MQAM signals under the effect of SC diversity via numerical integration is presented. These performance evaluations allow designers to determine M-ary modulation methods for Nakagami fading channels.

Performance Analysis of M-ary System in Nakagami Fading Channel (Nakagami 페이딩 채널하에서 M-ary FSK 시스템의 성능분석)

  • 김창환;한영열
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.10 no.7
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    • pp.1074-1084
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    • 1999
  • In this paper the bit error probability of noncoherent M-ary FSK system is derived from the probability density function of the envelope of the received signal over a frequency-nonselective slowly m-distributed Nakagami fading channel. Also, the performance of coherent M-ray FSK system is theoretically analyzed, using union bound over the similar fading channel. Then we compare uncoded performance results for M-ary FSK and DPSK signals in Nakagami fading channel.

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Polar Code Design for Nakagami-m Channel

  • Guo, Rui;Wu, Yingjie
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.14 no.7
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    • pp.3156-3167
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    • 2020
  • One drawback of polar codes is that they are not universal, that is, to achieve optimal performance, different polar codes are required for different kinds of channel. This paper proposes a polar code construction scheme for Nakagami-m fading channel. The scheme fully considers the characteristics of Nakagami-m fading channel, and uses the optimized Bhattacharyya parameter bounds. The constructed code is applied to an orthogonal frequency division multiplexing (OFDM) system over Nakagami-m fading channel to prove the performance of polar code. Simulation result shows the proposed codes can get excellent bit error rate (BER) performance with successive cancellation list (SCL) decoding. For example, the designed polar code with cyclic redundancy check (CRC) aided SCL (L = 8) decoding achieves 1.1dB of gain over LDPC at average BER about 10-5 under 4-quadrature amplitude modulation (4QAM) while the code length is 1024, rate is 0.5.

Performance Analysis of Multicode DS/CDMA-BPSK Signal in Nakagami Fading Channel (Nakagami 페이딩 채널에서 멀티코드 DS/CDMA-BPSK 신호의 성능 분석)

  • 조성언
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.4 no.1
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    • pp.201-209
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    • 2000
  • In this paper, the bit error rate (BER) performance of Multicode DS/CDMA-BPSK communication system is investigated in the presence of multi user interference and Nakagami fading channel environments. The DS/CDMA-BPSK communication system adopts multicode technique to enhance the data transmission rate. Using the calculated BER performance, BER figures of Multicode DS/CDMA-BPSK communication system are shown to discuss the effect of the number of multi user interference, Nakagami fading index, and data transmission rate. From the results, the transmission rate of DS/CDMA-BPSK signal improve by adopting Multicode technique. And we know that the major parameter of BER performance degradation in Multicode DS/CDMA system is the effect of multi user interference than the fading depth.

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Cochannel Interference Probability of Cellular Mobile Radio Systems in the Environments of Noise and Nakagami Fading plus Lognormal Shadowing (잡음, 나카가미 페이딩과 대수정규 shadowing이 존재하는 환경하에서 셀룰라 이동 무선 시스템의 동일 채널 간섭 확률)

  • 심용회;조성언;조성준
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.19 no.9
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    • pp.1668-1679
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    • 1994
  • The cochannel interference probability has been estimated both in the environment of Nakagami fading and Gasussian noise and in the environments of Gaussian noise and Nakagami fading plus log-normal shadowing. In noise and Nakagami fading environments, a theoretical analysis has been performed in order to calculate the cochannel interference probability in addition to computer simulation. In the environments of noise and Nakagami fading plus shadowing, only a simulation technique is used due to complexity in analysis. The spectrum efficiency is discussed on each case.

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