Noise Reduction to DCSK Communications System Using WLS-SVM
Xiao Li · 2005
This paper proposes a noise reduction method to DCSK communications system using weighted least square support vector machine (WLS-SVM). Noise reduction is achieved by first using a LS-SVM with the transmitted chaotic signal and, then associate weighting values to the error variables based upon the resulting error variables from the first step. Computer simulation of the noise performance shows that the noise reduction technique improves the overall noise performance compared with theoretical noise performance of DCSK Communications system.