基于DDS技术的2CPFSK调制器的实现  

2CPFSK Modulator' s Realization Based on DDS Technique

作　　者：孙文友[1] 宋祖勋[1] 段鹏[1] 

机构地区：[1]西北工业大学第365研究所,西安710072

出　　处：《通信技术》2006年第S1期170-172,共3页Communications Technology

基　　金："十五"预研基金资助项目(413250602)

摘　　要：连续相位的FSK调制是遥控、遥测通信中的主要调制方式。针对直接数字频率合成(DDS)的信号有稳定度高、分辨率高以及频率转换速度快的优点,提出了一种用单片机控制DDS芯片完成2CPFSK调制的方案,并用硬件电路实现。通过实验表明,用该方法设计的调制器具有输出信号相位连续、占用带宽小、调制信号的码速率高等优点。ContinuousPhase FSK modulation is the main modulation way of telecontrol,telemetry communication. Because of the high stabilization,high frequency resolution and high speed of frequency conversion of Direct Digital FrequencySynthesis signal,a scheme that uses MCU to control the DDSCMOS chip to achieve 2CPFSK modulation is proposed.This scheme is also implemented by hardware circuit.It is indicated from the experiment that the modulator designed by this method has the advantages of the output signal with continuous phase,the low bandwidth and the code rate of modulation signal.

关 键 词：单片机 直接数字式频率合成 连续相位 滤波器 

分 类 号：TN761[电子电信—电路与系统]