频谱共存下基于OFDM-LFM的机载组网雷达射频隐身波形优化算法  

OFDM-LFM based radio frequency stealth waveform optimisation algorithm for airborne network radar under spectral coexistence

作　　者：王健[1] 时晨光 周建江[1] 汪飞[1] Wang Jian;Shi Chenguang;Zhou Jianjiang;Wang Fei(Key Laboratory of Radar Imaging and Microwave Photonics,Ministry of Education,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学雷达成像与微波光子技术教育部重点实验室,南京210016

出　　处：《战术导弹技术》2024年第5期111-121,共11页Tactical Missile Technology

基　　金：国家自然科学基金面上项目(62271247);江苏省自然科学基金优秀青年基金项目(BK20240181);江苏高校“青蓝工程”;国防基础科研计划资助项目(JCKY2021210B004);航空科学基金(20220055052001);江淮前沿技术协同创新中心追梦基金课题(2023-ZM01D001)。

摘　　要：随着雷达和通信系统对频谱资源需求日益增长,加之现代战争对雷达生存能力提出的严峻挑战,研究了频谱共存下基于正交频分复用-线性调频波形(Orthogonal Frequency Division Multiplexing-Linear Frequency Modulation,OFDM-LFM)的机载组网雷达射频隐身波形优化算法。采用信干噪比(Signal to Interference Plus Noise Ratio,SINR)作为机载组网雷达探测性能表征指标。以满足雷达探测性能以及不干扰通信频谱为约束条件,以最小化机载组网雷达总辐射能量为优化目标,构建频谱共存下机载组网雷达射频隐身波形优化模型。在此基础上,针对上述非线性、凸优化模型,采用序列二次规划(Sequential Quadratic Programming,SQP)算法进行求解。构建基于OFDM-LFM的射频隐身波形多径回波模型,分析所设计射频隐身波形的探测性能和抗多径效应性能。仿真结果表明,所提算法能够有效降低机载组网雷达的总辐射能量,进而提升射频隐身性能;此外,基于OFDM-LFM的射频隐身波形具有良好的探测性能和抗多径效应性能。With the increasing demand for spectrum resources from radar and communication systems,coupled with the severe challenges posed by modern warfare to the survivability of radar,the radio frequency(RF)stealth waveform design algorithm for airborne network radar based on orthogonal frequency division multiplexing-linear frequency modulation(OFDM-LFM)under spectral coexistence is investigated.The signal to interference plus noise ratio(SINR)is adopted as the characterization index of airborne network radar detection performance.With the constraints of satisfying the radar detection performance and not interfering with the communication spectrum,and with the optimization objective of minimizing the total radiated energy of the airborne network radar,the RF stealth waveform optimization model of the airborne network radar is constructed under the spectrum coexistence.On this basis,the sequential quadratic programming(SQP)algorithm is used for solving the above nonlinear and convex optimisation model.Finally,the multipath echo model of RF stealth waveform based on OFDM-LFM is constructed to analyze the detection performance and anti-multipath effect performance of the designed RF stealth waveform.Simulation results show that the total radiated energy of the airborne network radar can be effectively reducd by the proposed algorithm,so as to improve the RF stealth performance.In addition,the RF stealth waveform based on OFDM-LFM has good detection performance and anti-multipath effect performance.

关 键 词：波形设计 射频隐身 频谱共存 OFDM-LFM 组网雷达 SQP算法 

分 类 号：TN959[电子电信—信号与信息处理]