DVB-CID信号解调算法与性能研究

载波标签(CID, Carrier Identification)技术是近年来提出的从技术与标准上根本解决卫星通信无线频率干扰问题的创新技术。本文针对DVB-CID信号的解扩及信息提取进行了深入研究，提出了一种基于主载波消除处理模式下的抗频偏解扩算法，此算法无需载波波形重构，复杂度低，抗噪性能好，可广泛应用于此类扩频隐藏信号的解调。仿真表明，此算法解扩性能接近理论限，应用于CID信号的解调接收工程实践可获得良好效果。 

Researching on Demodulation Algorithm and Performance of DVB-CID Signal

Carrier Identification (CID，Carrier Identification) technology is an innovative technology that has fundamentally solved the problem of radio frequency interference in satellite communication in recent years. In this paper, the despreading and information extraction of the DVB-CID signal are studied, and an anti-frequency offset despreading algorithm based on the carrier cancellation process is proposed,which has low complexity and good anti-noise performance, and can be widely applied to demodulation of such Spread spectrum signal hidden by carrier signal. The simulation results show that the BER of this the algorithm is close to the theoretical line performance, and it can be efficiently applied to the demodulation and engineering practice of the DVB-CID signal.