Journal on Communications ›› 2015, Vol. 36 ›› Issue (7): 138-143.doi: 10.11959/j.issn.1000-436x.2015183

• Academic paper • Previous Articles     Next Articles

Broadband receiver of narrowband signal based on the cascaded stochastic resonance

Cheng-guo HOU1,2,Bo-wen LUO1,Di LI2   

  1. 1 Information System Engineering Institute,PLA Information Engineering University,Zhengzhou 450002,China
    2 Troops 69260 of PLA,Urumqi 830017,China
  • Online:2015-07-25 Published:2015-07-25
  • Supported by:
    The National Natural Science Foundation of China;The National Natural Science Foundation of China

Abstract:

To improve the demodulation gain of traditional narrowband receiver,a narrowband signal receiving method of broadband based on cascaded stochastic resonance is proposed.On one hand,the noise in the signal is converted to the signal energy by the stochastic resonance operation on the received signal.On the other hand,by cascading stochastic resonance systems,the received signal is changed into square wave signal; and by constructing related sequences with prior information of received signal,the demodulation output has high gain.Theoretical analysis and simulation results show that compared with the traditional approach,this method improves detection performance in terms of SNR by more than 3 dB.And for receiving SNR of QPSK in ?7~1 dB,the gain increased is about 20 dB.

Key words: stochastic resonance, broadband receiver, cascaded, narrowband signal, local sequenc

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