Study on the application of the interference cancelling technique using cross-coupled PLL in spread spectrum communication systems

Based on modern military anti-jamming communication and navigation this paper shows that the processing gain of a spread spectrum communication system is hardly increased in the presence of limited RF band and high data rate. In this case, if multiple strong interfering signals are added to the front-end of the receiver, the performance of the system will become worse. To solve this problem, a new approach with a combination of co-channel separation and the spread spectrum technique is presented in this paper. Detailed theoretical analysis and plenty of computer simulations are also made. Results demonstrate that this scheme, compared with other approaches, can not only cancel multiple interfering signals effectively but also keep the desired signals from being faded and distorted.