基于锁相环CD4046的跳频频率合成器设计

Design of the Frequency Synthesizer for Frequency Hopping Systems Based on PLL CD4046

首先介绍了跳频扩频通信的定义、原理以及突出优点,其次阐述了跳频系统重要性能指标的改进以及常用伪随机序列跳频码RS序列的编码方法,接下来对系统的核心部件频率合成器进行了研究。最后基于锁相环频率合成法设计系统模块图,对其中所用CD4046、CC14526、CC4013等重要芯片进行了详细分析,将焊接好的电路板通过仿真实验并给出了结果。

This paper first introduces the definition, principle and outstanding advantages of frequency hopping（FH） spread spectrum communication system, then expatiates the improvement on some important specifications of FH system and the coding method of commonly used pseudorandom sequence of FH code-RS sequence, followed by the research on the core part of the system -frequency synthesizer. Finally,it uses phaselocked loop（PLL） frequency synthesizing method to design the block diagram, and analyses its inside chips such as CD4046, CC14526, CC4013. It also performs simulation for the finished circuit board and gives the result.