摘要
针对小型飞行器数据链中信号传输速率的要求,介绍了二进制连续相位的FSK调制原理,提出了基于直接数字频率合成技术的2CPFSK调制器的设计与电路实现。给出了提高频谱纯度的椭圆函数型滤波器的设计,实现了对高速数字信号的2CPFSK调制。通过小型飞行器数据链图像信号的传输应用实验验证:该设计实现了程序自动调节频偏,得到了较小的调制指数,解决了小型飞行器数据链高速数据传输的问题。
Aiming at the requirement of signal transmitting ratio in the small aircraft data link, the principle of binary continuous phase FSK modulation is introduced. The design that achieves the 2CPFSK modulator based on the DDS technique is presented and this scheme is achieved through circuits. In the circuits design, a meth- od of designing elliptic filter that improves the frequency spectrum pureness is presented and the 2CPFSK modulation to high-speed digital signal is implemented. The image signal transmission experiment of small aircraft data link shows that the automatic adjustment of frequency offset using programming and the less modulation index are achieved using this design. The problem of high-speed data transmission in the small aircraft data link is solved using this scheme.
出处
《测控技术》
CSCD
2006年第12期7-9,13,共4页
Measurement & Control Technology
基金
十五预研基金资助项目(413250301)
