基于调频率调制的雷达通信共享信号研究

雷达通信一体化可有效提高电子系统的资源共享，是实现电子装备多功能综合一体化的一个重要方向。本文根据Chirp信号的调频率与分数阶傅里叶变换的阶数之间的关系，提出了一种基于Chirp信号调频率的雷达通信共享波形，固定调频率的主载波实现雷达功能，副载波由通信码元键控得到调频率从而实现通信信息调制；主载波与副载波的叠加形式使此共享信号能在不影响雷达性能的前提下实现单脉冲多比特的数据传输，而且利用不同阶数的分数阶傅里叶变换的解调过程具有多普勒稳健性。

Study on Integrated Radar and Communication Signal Based on Chirp-rate Modulation

Integrated radar and communication system can make full use of radar equipment and play an important role in achievement of multi-functional integration of electronic equipment. A kind of integrated radar and communication signal is proposed based on the relationship between chirp-rate of chirp signal and the order of fractional Fourier transform. Its main carrier adopts the unique chirp signal to implement radar function, while communication information is modulated by the subcarrier with communication code keying chirp-rate chirp signal. The superposition of the main carrier and the subcarrier enables the signal to transmit multi-binary information by single signal without degrading radar's performance. Finally, simulations demonstrate that the proposed signal has an advantage of high robustness.