Amplitude-locked loop separation and encryption system analysis combined cognitive radio

In transmission channel of wireless communication system, the major factors affect the communication quality by co-channel interference and channel fading, etc. This paper discussed how to encrypt original signals by using the amplitude-locked loop (ALL) algorithm in Gaussian noise channel environment. In this paper, we developed an amplitude-locked loop combined rotation algorithm to suppress co-channel interference (CCI) according to signal characteristics of demodulation and separation in wireless channel environment. The proposed amplitude-locked loop separation and decryption system would be implemented the statistic independent characteristics and mathematics algorithm to modulate and encrypt for original signals that did not required via various process of multi-access to attain the complete signal separation effect. The output signals are also estimated by signal spectrum cognitive operation through cognitive radio concept that could be obtain original signals of noise interference in transmission channel.