频率合成器相位噪声对跳频通信系统的影响  

The Influence to the FH System Caused by Phase Noise of Frequency Synthesizer

作　　者：徐启刚[1] 张辉[1] 

机构地区：[1]西安电子科技大学通信工程学院,西安710071

出　　处：《空间电子技术》2006年第4期46-51,共6页Space Electronic Technology

基　　金：国防重点实验室项目:卫星抗综合干扰技术研究;项目编号(51473020105DZ0103)

摘　　要：宽带、高速跳频频率合成器是整个跳频通信系统的核心,其输出信号的相位噪声对系统性能的影响不可忽略。它将限制接收机能得到的最大信噪比,导致接收机灵敏度下降,同时降低数字解调器的性能。文章首先从理论上分析了相位噪声对跳频通信系统的影响,然后结合实际的数传系统,对相噪进行了仿真,仿真结果证明了理论分析的正确性。Broadband and high speed frequency synthesizer is the core of the FH communication system, and the impact on the system capability caused by the phase noise of its output cant be neglected. It restraints the greatest SNR that the receiver can receive, causes the receiver＇s sensitivity dropping, reduces the performance of the digital demodulator at the same time. At first this article theoretically has analyzed the influence to the FH communications system caused by the phase noise, and has simulated the phase noise combining the actual data transmission communications, and the simulation result has proved the exactness of the theoretical analysis.

关 键 词：相位噪声 QDPSK 跳频通信 频率合成器 

分 类 号：TN74[电子电信—电路与系统]