Research On Digital Voice Trunking Encryption System Based On Wireless Ultrashort Wave

The trunking communication system is mainly used in government, public security, fire and other emergency mobile communications. As the trunking communication system needs to transmit large amount of secret information, confidentiality of communications demanding. Voice encryption is the core technology in trunking communications.This paper proposes a new PMA-CDSK voice encryption algorithm and a new chaotic binary method. This system uses the logistic map to generate chaotic sequence of digitized voice signal processing, chaotic sequence which can effectively enhance the safety of the speech is random.Experimental results show that the chaotic voice encryption algorithm has better security. It can effectively improve the anti-decipher capacity and improve the bit error rate of the system.