Design and study of turbo coding for anti-noise chaotic cryptographic system

• Main Authors: Rong-Jer Tsai, 蔡溶哲
• Other Authors: 魏學文
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/25632269303490115682

碩士 === 國立暨南國際大學 === 電機工程學系 === 101 === In this thesis, we present an anti-noise scheme for chaotic cryptographic system(CCS).The original chaotic signal is needed for coherent decryption in receiver. However, receiver can’t get the original chaotic signal when the transmitted chaotic signal adding noise in the transmission channel, so as to decrypt in correctly. The channel coding is used to anti-noise in digital communication system. The Reed-soloman code, low-density parity-check code and turbo code are famous channel coding, and turbo coding has better error correction capability. Turbo coding combines with CCS in this paper. Sender and receiver can be synchronized on the wireless channel. The BER performance of this scheme is better than the conventional CCS about 6.7dB, since it reduces most of noise. This system enhances effectively the quality of communication.