摘要
分析对比了目前主流的以数控方式调节功放发射功率的方式,论述了传统调节方式在高速跳频系统中的局限性,并在此基础上介绍了以数字信号处理技术结合数模转换电路产生功放调制信号的方法。采用基于标定数据的数字预失真方法,结合数字闭环控制技术,设计了一种通过实时调整功放调制信号修正功放发射功率而将其控制在理想范围的方法。最后,以某高速跳频通信系统为例,通过实际测试,验证了方法的有效性,也指出了进一步改进的方向。
The current mainstream mode to adjust the power-amplifier emission in numerical control is analyzed and compared. The limitations of traditional adjustment methods in high-speed frequency-hopping systems are discussed. Based on this, the method of digital signal processing technology in combination with digital-to-analog conversion circuit for generating power amplifier modulation signal is described. With digital predistortion method based on calibration data, combined with digital closed-loop control technology, a method for correcting power-amplifier emission power by adjusting the power modulation signal in real time to control it within an ideal range is proposed and designed. Finally, with certain high-speed frequency-hopping communication system as an example, the actual tests indicate the effectiveness of the proposed method, and meanwhile, point out the direction of further improvement.
作者
陆阳
赵敏丞
LU Yang;ZHAO Min-cheng(No.20 Institute of CETC, Xi＇an Shaanxi 710068, China)
出处
《通信技术》
2018年第5期1223-1227,共5页
Communications Technology
关键词
高速跳频
数字化幅度调制
数字预失真
闭环控制
high-speed frequency-hopping
digital amplitude modulation
digital predistortion
closed-loop control
