基于PN与OFDM技术的射频隐身雷达信号设计

飞机必须具有良好的射频隐身性能，以降低无源探测系统对飞机的探测距离及识别效果，从而使飞机及其机载雷达等电子设备减少被截获、被干扰甚至被摧毁的可能性。提出了机载雷达射频隐身信号的设计原Ⅻ，根据此原则设计和研究了基于伪随机码调制与正交频分复用技术的雷达信号。所设计的雷达信号具有较低的峰均功率比，通过基于数字信道化接收机无源探测系统的仿真实验，验证了该雷达信号相对常用的线性调频雷达信号具有更好的射频隐身性能。

Design of RF Stealth Radar Signal Based on Pseudo-Random Code and OFDM Technique

Aircraft should have RF stealth performance which can reduce the detection range and identification effect of passive detection system aiming to the aircraft, so that the aircraft and airborne electronic equipment can decease the probability of being intercepted or even destroyed. The design principle of RF stealth signal of the airborne radar is presented. According to this principle, the radar signal based on the pseudo-random code modulation and orthogonal frequency division multiplexing（OFDM） technique is designed and studied. The radar signal has a lower peak-to-average power ratio（PAPR）, and the RF stealth performance of the ra- dar signal is verified to be better than the common linear frequency modulated radar signal through simulation experiment based on the passive detection system adopting the digital channelized receiver.