基于随机共振理论对2FSK信号输出误码率的研究

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摘要 2FSK信号常用于进行中低速数据传输，但在强噪声背景下2FSK信号接收产生的误码率较高，基于以上问题提出了一种基于随机共振理论降低2FSK信号相干接收误码率的新方法。根据随机共振原理建立了非线性系统模型，进行数值实验研究，并与传统降低误码率的解调方法进行对比。实验数据显示：系统输入信噪比在-14.3dB～0dB区间时，输出的误码率会呈现大幅度的降低，其中系统输入信噪比在-6.5dB时，相比于传统模型误码率下降了14.3%,同时输出的频谱载波幅值是传统方法的2.07倍,系统输出信号的准确率得到大幅提升。

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关键词 ：随机共振, 误码率, 2FSK信号, 非线性双稳系统, 信噪比

Abstract：2FSK signal is often used for low speed data transmission,but under the background of strong noise 2FSK signal receiving the error rate is higher. A novel method, based on the decreasing coherent reception error rate of binary phase shift keying signal with stochastic-resonance-theory, was introduced to get enhanced reception of 2FSK signal under noisy environment. The model was built under stochastic-resonance-theory and calculated utilizing MATLAB. Compared with the traditional demodulation, a great reduction of signal to noise ratio(SNR) was obtained from -14.3dB to 0dB. Furthermore, the error rate decreased by 14.3%. Meanwhile, the outputting carrier wave was 2.07 times the spectrum amplitude of that under previous method.

Key words： Stochastic Resonance Bit Error Rate 2FSK Signal Nonlinea Bistable system Signal to noise ratio

收稿日期: 2016-05-13 出版日期: 2017-09-28

引用本文:

王硕，王辅忠，尚金红，张光璐. 基于随机共振理论对2FSK信号输出误码率的研究[J]. 振动与冲击, 2017, 36(19): 8-12.
Wang Shuo Wang Fuzhong Shang Jinhong Zhang Guanglu. Research on the 2FSK-signal output error-rate influenced by Nonlinear stochastic resonance system. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(19): 8-12.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I19/8

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