Noise-Enhanced subthreshold signal reception by a stochastic resonance receiver using a non-dynamical device
Noise-Enhanced subthreshold signal reception by a stochastic resonance receiver using a non-dynamical device
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DOI：
10.1587/nolta.6.303
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Hiroya Tanaka;Keita Chiga;T. Yamazato;Y. Tadokoro;Shintaro Arai
中科院分区：
文献类型：
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作者：
Hiroya Tanaka;Keita Chiga;T. Yamazato;Y. Tadokoro;Shintaro Arai
随机共振（SR）是噪声增强系统响应的有趣现象。尽管噪声增强系统响应、增强器件灵敏度以下的微弱信号是SR的一个引人注目的现象，但很少有研究者关注通信系统中的SR效应。本文讨论了通信系统中的随机共振效应。我们专注于当接收信号强度低于接收器灵敏度时无法建立通信的问题。本研究的目的是评估随机共振接收机的误比特率（BER）性能，揭示通信系统中的随机共振效应。我们提出了一种分析方法的SR接收机使用一个非动态的设备，表现出SR效果。数值结果表明，SR效果可以提高BER相比，没有SR的系统。本文的贡献是两个倍：我们目前的研究的第一个贡献是，SR接收机使用非动态设备的BER可以解析地推导出来。我们的研究的第二个贡献是，每个符号的样本数，接收信号的幅度，和接收机的灵敏度是三个重要的参数。我们进一步推导出SR系统的最大性能增益。虽然我们的重点是主要的通信系统，但是，我们的研究结果可以应用到其他系统。
Stochastic resonance (SR) is an interesting phenomenon in that noise enhances system response. Despite attractive phenomenon of SR that noise enhances system response, enhancement of the weak signal below device sensitivity, and few researchers have addressed the SR effect in communication systems. This paper discusses the SR effect in communication systems. We focus on the problem in which communication cannot be established when the received signal strength is below receiver sensitivity. The purpose of this study is to evaluate the bit error rate (BER) performance of the SR receiver and reveal the SR effect in communication systems. We propose an analysis method for the SR receiver using a non-dynamical device that exhibits SR effect. The numerical results show that the SR effect can improve the BER compared to a system without SR. The contribution of the paper is two folds: The first contribution of our present study is that the BER of the SR receiver using a non-dynamical device can analytically be derived. The second contribution of our study is that the number of samples per symbol, the received signal amplitude, and the receiver sensitivity are three important parameters. We further derive the maximum performance gain by the SR system. Although our focus is on primary communication systems; however, our findings can be applied to other systems.