Performance analysis of energy metrics for viterbi soft decoding algorithm based on M-FSK signal

被引：0
作者：
Dong, Bin-Hong [1 ]
Tang, Peng [1 ]
Du, Yang [1 ]
Zhao, Yan [1 ]
机构：
[1] National Key Laboratory of Communication, University of Electronic Science and Technology of China, Chengdu
来源：
Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology | 2015年 / 37卷 / 08期
关键词：
Bit Error Rate (BER); Bit Log-Likelihood Ratio (LLR); Energy metrics; M-ary Frequency Shift Keying (M-FSK); Viterbi decoding;
D O I：
10.11999/JEIT141532
中图分类号：
学科分类号：
摘要：
The Viterbi decoding algorithm is widely used in the wireless digital communication system, generally using the bit Log-Likelihood Ratio (LLR) as its input. For an M-ary Frequency Shift Keying (M-FSK) signal, a corresponding Viterbi decoding algorithm by directly adopting the M-dimensions energy information of the signal demodulation as the decoder branch metrics is proposed. This paper analyzes the theoretical performance of the proposed algorithm in the AWGN and the Rayleigh fading channels, and the upper bound for closed-form expressions of the Bit Error Rate (BER) performance are derived. The validity of the theoretical derivation is demonstrated by the simulations. Compared with the existing Viterbi algorithm, the proposed scheme can avoid the computing of the bit LLR and the branch metric, also it can descend the complex of the algorithm and decrease the loss of the information, improve the BER performance in the presence of Viterbi decoding algorithm which based on the M-FSK signal soft demodulation. Thus, the proposed scheme is a Viterbi decoding algorithm that is more adaptive to the actual project based on the M-FSK signal. ©, 2015, Science Press. All right reserved.
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页码：1920 / 1925
页数：5
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