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| Design of Anti-Phase-Noise Hybrid Waveforms for Airborne Early Warning Radar |
| CHENG Di1， JIANG Guotao2，3， LI Ke1， ZHU Zhangqin1，
MENG Xiangdong1， ZHANG Liang1 |
| 1. Nanjing Research Institute of Electronics Technology， Nanjing 210039， Jiangsu， China；
2. Shanghai Electro-Mechanical Engineering Institute， Shanghai 201109， China；
3. Key Laboratory of Automatic Target Recognition （Shanghai）， Shanghai 201109， China |
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Abstract With the continuous increase in the power-aperture product, airborne early warning radars (AEWRs) are imposing increasingly stringent requirements on system phase noise levels. Clutter spectrum broadening and noise floor elevation resulting from insufficient device phase noise severely constrain radar detection performance, which has become an urgent technical bottleneck to be addressed. Existing solutions are predominantly based on hardware performance improvements, generally suffering from limitations including high cost, long development cycles, and difficult deployment. To this end, this paper shifts the perspective and proposes a hybrid waveform design method combining low pulse repetition frequency (PRF) and medium-to-high PRF from the system architecture and waveform design levels. The theoretical relationship between system phase noise requirements and range segments is analyzed. Through segmented design, specialized waveforms satisfying different phase noise requirements for different range segments are developed. Without modifying hardware, the proposed method effectively suppresses noise floor elevation induced by phase noise, providing a new path featuring low cost, high feasibility, and rapid engineering implementation for addressing the phase noise problem in airborne early warning radars. Finally, the effectiveness of the proposed waveform design method is verified through simulation experiments.
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Received: 09 April 2026
Published: 10 July 2026
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2026, Vol. 9 
