文章摘要
尚金红,王辅忠,张光璐,张慧春.基于随机共振的2PSK信号相干接收误码率的研究*[J].,2015,34(6):495-500
基于随机共振的2PSK信号相干接收误码率的研究*
Study of 2PSK signal’s BER by coherent demodulation based on stochastic resonance
投稿时间:2015-03-25  修订日期:2015-08-13
中文摘要:
      针对在信道环境恶劣的情况下,数字信号接收端的误码率较高的问题,提出一种基于自适应参数调节双稳随机共振系统降低误码率的新方法,得到了输入信噪比小于0db、相干解调接收二进制相移键控信号(binary phase shift keying,简记为2PSK)条件下,系统误码率与输入信噪比的仿真曲线。研究表明:通过非线性双稳系统的2PSK在输入信噪比达到-7.4db时较传统线性解调系统误码率可降低20.1%,这正是对2PSK信号在信道环境恶劣情况下传输的一个补充,对数字带通信号传输具有一定的参考价值。
英文摘要:
      For the problem of high bit error rate of digital receiving terminal in a poor channel environment. A new method of adaptive stochastic resonance was proposed, which is used to reduce the bit error rate. The curve of system bit error rate (BER) with the input signal to noise ratio (SNR) was obtained under the conditions of the input SNR is less than 0db, a method of coherent demodulation is used to 2PSK signals. Simulation results show that the 2PSK signal’s BER can be reduced 20.1% when the SNR reaches to -7.4db while it through the nonlinear bistable system. This is a complement to the 2PSK signal transmission in a poor environment. The analytical results can be used to improve the performance of digital signal communication system.
DOI:
中文关键词: 随机共振  2PSK信号  非线性双稳系统  误码率
英文关键词: stochastic resonance  2PSK signal  nonlinear bistable system  bit error rate
基金项目:国家自然科学基金(61271011)
作者单位E-mail
尚金红 天津工业大学理学院 天津 sjh19920226@163.com 
王辅忠 天津工业大学理学院 wangfuzhong@163.com 
张光璐 天津工业大学理学院 zhangguanglu@139.com 
张慧春 天津工业大学理学院  
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