基于自适应双稳态随机共振的加性拉普拉斯噪声中的微弱信号接收

Jin Liu, Zan Li, Qiguang Miao, Li Yang
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引用次数: 0

摘要

弱信号接收是通信系统中一个非常重要且具有挑战性的问题,尤其是在存在非高斯噪声的情况下,最佳线性相关接收器的性能会急剧下降。为此,我们研究了一种基于自适应双稳态随机共振(ABSR)的新型非相关接收方案,用于接收加性拉普拉斯噪声中的微弱信号。通过分析噪声信号特征与非线性双稳态系统之间的定量合作共振匹配关系这一关键问题,得出了双稳态系统参数的分析表达式。在此基础上,通过双稳态系统参数的自适应调节,可以轻松产生反直觉的随机共振(SR)现象,将随机噪声转化为帮助信号传输的益处。最后,研究表明,与传统的非相关接收器相比,基于 ABSR 的非相关接收器在低信噪比(SNR)(-30dB 至 -5dB)条件下的误码率(BER)性能提高了约 8dB。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Adaptive bistable stochastic resonance based weak signal reception in additive Laplacian noise
Weak signal reception is a very important and challenging problem for communication systems especially in the presence of non-Gaussian noise, and in which case the performance of optimal linear correlated receiver degrades dramatically. Aiming at this, a novel uncorrelated reception scheme based on adaptive bistable stochastic resonance (ABSR) for a weak signal in additive Laplacian noise is investigated. By analyzing the key issue that the quantitative cooperative resonance matching relationship between the characteristics of the noisy signal and the nonlinear bistable system, an analytical expression of the bistable system parameters is derived. On this basis, by means of bistable system parameters self-adaptive adjustment, the counterintuitive stochastic resonance (SR) phenomenon can be easily generated at which the random noise is changed into a benefit to assist signal transmission. Finally, it is demonstrated that approximately 8dB bit error ratio (BER) performance improvement for the ABSR-based uncorrelated receiver when compared with the traditional uncorrelated receiver at low signal to noise ratio (SNR) conditions varying from −30dB to −5dB.
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