地震地磁观测与研究2012，Vol.33Issue(1)：111-116,6.DOI:10.3969/j.issn.1003-3246.2012.01.023
Viterbi译码算法在GMSK系统中的性能分析
Performance analysis on transmission of seismic data with the Viterbi decoder algorithm in the GMSK system
景晟 1吴彤 1钟立人 1王余伟1
作者信息
- 1. 中国成都610041 四川省地震局水库地震研究所
- 折叠
摘要
Abstract
GMSK modulation and Viterbi decoding are generally applied in the CDDM-1A data radio used to transmit seismic data. Viterbi decoding is a maximum likelihood decode algorithm, the complexity of which is independent of channel quality. GMSK is a widely applied modulation mode in radio systems. By studying the implementation theory of the software and hardware decision algorithms of the Viterbi decoding, and comparing the error rates of the two decisions in the GMSK system, this paper establishes a complete communication simulation system based on GMSK modulation, convolutional code and comparing of the software and hardware decision algorithms of the Viterbi decoder in the Simulink, to analyze the impact of different SNRs on error rates. The simulation results prove the validity of the system established, and demonstrate that using GMSK modulation, at error rates ranging from 10-3 to 10-2, the software decision improves SNR by 3 dB than that of the hardware decision. Therefore, Viterbi decoding can be used by the radio system to ensure the transmission quality of seismic data.关键词
Viterbi译码/地震数据/GMSK/滤波/量化Key words
Viterbi decoder/ seismic data/GMSK/filtering/quantization引用本文复制引用
景晟,吴彤,钟立人,王余伟..Viterbi译码算法在GMSK系统中的性能分析[J].地震地磁观测与研究,2012,33(1):111-116,6.
