A chaotic speech secure communication system to binary CDMA using a digital chaotic cell

摘要

the present invention is a binary code division multiple access (Code division multiple access: below CDMA) system in the audio information relates to a voice scrambler chaotic communication systems in which non-image areas is possible. ; binary chaos CDMA voice scrambler system comprises a first binary CDMA system for outputting the received speech signal into a binary level of the signal using a digital chaos cell according to the present invention; Encryptor for encrypting the transmission level of the signal received by the binary encoding with hyper chaotic PN signal generated by the digital chaotic cell, and transmitting the encrypted signal to a communication channel using a transmitter; A decoder for decoding received receives the encrypted signal transmitted by the communication channel using the receiver in synchronization based on the hyper-chaotic signal generated by the digital chaotic PN cells; And the decoded binary level signal and outputting a second binary CDMA system speech signal; characterized in that it comprises a ; According to the present invention, hyper-chaotic PN code generated by the digital chaotic cell Since a high signal is a non-use is possible to secure chaotic sequence is used for ciphering the communication of the audio information permits the transmission of voice information secure. In addition, the audio signal processing system including a voice scrambler chaotic structure using simple XOR chaotic system and the possible chip implementation of a voice scrambler DS / SS algorithm using logical operations enables the ciphering communication.