Novel method to reduce the estimation variance of DCSK

Author

Hu, Liu ; Jing, Zhang Shu ; Bo, Liu Jim ; Chun, Wu Ri ; Ping, Zhang Li

Author_Institution

Tongji Univ., Shanghai, China

fYear

2001

fDate

2001

Firstpage

1142

Lastpage

1146

Abstract

In this paper, we analyze the factors which cause the estimation variance in a DCSK (differential chaos shift keying) telecommunication system implemented with a noise reduction module. There are three main factors in this system: the DCSK signal itself, the additive channel noise and the noise reduction module. To avoid the variance in the DCSK signal and the signal reduction that is caused by additive channel noise, a novel DCSK scheme with a chaotic polyphase sequence (CPS) is presented. Simulation results show that the noise performance of this novel DCSK slightly degrades in contrast with frequency-modulated (FM) DCSK for the estimation variance of the noise reduction scheme. However, this design can be implemented easily

Keywords

chaos generators; estimation theory; interference suppression; modulation; noise; performance index; sequences; telecommunication channels; DCSK telecommunication system; additive channel noise; chaotic polyphase sequence; differential chaos shift keying; estimation variance reduction; frequency modulation; noise performance degradation; noise reduction module; Additive noise; Additive white noise; Analysis of variance; Chaos; Degradation; Noise reduction; Phase locked loops; Phase modulation; Signal generators; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Transportation Systems, 2001. Proceedings. 2001 IEEE

Conference_Location

Oakland, CA

Print_ISBN

0-7803-7194-1

Type

conf

DOI

10.1109/ITSC.2001.948823

Filename

948823