Demodulation of QAM signals based on chaotic oscillators

Author

Chao-san Yang ; Tian-qi Zhang ; Yi Pan ; Ling Deng

Author_Institution

Chongqing Key Lab. of Signal & Inf. Process. (CQKLS&IP), Chongqing Univ. of Posts & Telecommun. (CQUPT), Chongqing, China

Volume

03

fYear

2013

fDate

16-18 Dec. 2013

Firstpage

1504

Lastpage

1508

Abstract

By making use of the chaotic oscillator, a new method of demodulating QAM signal submerged in strong noise is presented. According to the method, the problem of weak digital modulation signal was solved. Duffing system is sensitive to specific signal and immune against the noise. For the fork problem of Duffing oscillator, taken the signal into multiple systems at the same time. Different Systems were sensitive to different tested signals. The signal was changed in a different phase and amplitude. QAM signal was demodulated by judging the system state. The simulation results show that this demodulation method is suitable for demodulating the QAM signal.

Keywords

demodulation; oscillators; quadrature amplitude modulation; Duffing oscillator; QAM signal demodulation; chaotic oscillators; strong noise; weak digital modulation signal; Chaotic communication; Constellation diagram; Demodulation; Entropy; Oscillators; Quadrature amplitude modulation; Duffing oscillator; QAM; the power spectrum entropy;

fLanguage

English

Publisher

ieee

Conference_Titel

Image and Signal Processing (CISP), 2013 6th International Congress on

Conference_Location

Hangzhou

Print_ISBN

978-1-4799-2763-0

Type

conf

DOI

10.1109/CISP.2013.6743913

Filename

6743913