基于AD9779A的MSK信号调制的实现  

The Realization of MSK Signal Modulation Based on AD9779A

作　　者：柳兵 LIU Bing(Southwest China Institute of Electronic Technology,Chengdu 610036,China)

机构地区：[1]中国西南电子技术研究所,四川成都610036

出　　处：《现代信息科技》2021年第3期44-47,共4页Modern Information Technology

摘　　要：MSK调制是一种恒定包络、相位连续的频率调制,其频谱集中度高,已经广泛地应用于通信、西方敌我识别系统中,该文深入分析了MSK信号的基本原理以及两级正交调制的实现模型。在此基础上,提出了一种基于高性能的DA转换器结合FPGA器件来实现MSK信号的调制方案,该方案经过实际板卡测试,并通过信号分析仪对板卡输出的调制信号质量进行了测试,测试结果表明取得较好的调制精度。该方案简洁高效,具有很强的工程实用性。MSK modulation is a kind of constant envelopment and phase continuous frequency modulation with high spectrum concentration.Which has been widely used in communication and western IFF identification system.The basic principle of MSK signal and the realization model of two level orthogonality modulation are analyzed in this paper.On this basis,a scheme based on high performance DA converter and combined with FPGA device to realize the modulation of MSK signal is proposed.The scheme has been tested by actual board card,and the quality of the modulation signal output by the board card has been tested by the signal analyzer.The test results show that the good modulation precision is achieved.The scheme is simple and efficient,and has strong engineering practicability.

关 键 词：MSK调制 AD9779A 差分编码 

分 类 号：TN76[电子电信—电路与系统]