基于加权模值的FDA最优频率间隔选取方法
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摘要
传统频率分集阵列(FDA)在阵元间引入的是固定的频率间隔,并不能使FDA在不同环境下都具有最优的抗干扰性能。文中提出了一种基于加权模值的自适应选取FDA最优频率间隔方法,通过对FDA最优波束形成器的输出信干噪比(SINR)的分析,推导出输出SINR与频率间隔潜在的关系,自适应选取阵列加权最小模值对应的频率间隔,形成单峰值波束方向图,并反馈给发射机,使得输出SINR最大化。理论和仿真结果均证明了FDA通过该方法选取到最优频率间隔后,具有更好的抗主、副瓣干扰性能。
The traditional frequency diverse array( FDA) introduces a fixed frequency increment between adjacent array elements,which does not make the FDA have the best anti-jamming performance in different environments. In this paper,a method of adaptive selection of FDA optimal frequency increment based on weighted modulus is proposed. By analyzing the output signal-to-interference-plus-noise ratio( SINR) of FDA optimal beamformer,the potential relationship between output SINR and frequency increment can be obtained. Then a single-peak beam pattern can be formed by adaptively selecting the frequency increment corresponding to the minimum weighted value of the array. It is fed back to the transmitter so as to maximize the output SINR. Both theoretical and simulation results show that the FDA has a better performance of mainlobe jamming and sidelobe jamming suppressing after selecting the optimal frequency increment by this method.
The traditional frequency diverse array( FDA) introduces a fixed frequency increment between adjacent array elements,which does not make the FDA have the best anti-jamming performance in different environments. In this paper,a method of adaptive selection of FDA optimal frequency increment based on weighted modulus is proposed. By analyzing the output signal-to-interference-plus-noise ratio( SINR) of FDA optimal beamformer,the potential relationship between output SINR and frequency increment can be obtained. Then a single-peak beam pattern can be formed by adaptively selecting the frequency increment corresponding to the minimum weighted value of the array. It is fed back to the transmitter so as to maximize the output SINR. Both theoretical and simulation results show that the FDA has a better performance of mainlobe jamming and sidelobe jamming suppressing after selecting the optimal frequency increment by this method.
引文
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[8] SHAO H,LI J C,CHEN H,et al. Adaptive frequency offset selection in frequency diverse array radar[J]. IEEE Antennas Wireless Propagation Letters,2014,13(1):1405-1408.
[9]项喆,陈伯孝,杨明磊.频率分集雷达最优频率间隔选择方法[J].西安电子科技大学学报(自然科学版),2017,44(4):14-20.XIANG Zhe,CHEN Boxiao,YANG Minglei. Frequency increment optimization method for frequency diverse radar[J].Journal of Xidian University(Natural Science Edition),2017,44(4):14-20.
[10]郑昱.基于频率分集阵列的波束形成研究[J].现代雷达,2015,37(8):29-32.ZHENG Yu. A study on the beam forming of frequency diverse array[J]. Modern Radar,2015,37(8):29-32.
[11] HONG H,MAO X P,HU C. A multi-domain collaborative filter for HFSWR based on oblique projection[C]//2012IEEE Radar Conference. Atlanta GA:IEEE Press,2012:907-912.
[12] CAO B,LIU A J,MAO X P. An oblique projection polarization filters[C]//2008 International Conference on Wireless Communication. Networking and Mobile Computing.Dalian,China:IEEE,2008:1893-1896.
[13] HUANG J,TONG K F,BAKER C J. Frequency diverse array with beam scanning feature[C]//2008 IEEE Antennas and Propagation Society International Symposium. San Diego,CA,USA:IEEE Press,2008:1-4.
[2] ANTONIK P. An investigation of a frequency diverse array[D]. London:University College London,2009.
[3]蒋燕妮,陈泽宗,赵晨.基于固定于对数频偏的频率分集阵列雷达波束特性研究[J].现代雷达,2017,39(10):25-29.JIANG Yanni,CHEN Zezong,ZHAO Chen. A study on beampattern of frequency diverse array radar of uniform and logarithmically increasing frequency offset[J]. Modern Radar,2017,39(10):25-29.
[4] BRADY S. Frequency diverse array radar:signal characterization and measurement accuracy[D]. Ohio:Air Force Institute of Technology,2010.
[5] XU J W,LIAO G S,ZHU S Q,et al. Deceptive jamming suppression with frequency diverse MIMO radar[J]. Signal Processing,2015,113(C):9-17.
[6] HAYKIN S. Cognitive radar:a way of the future[J]. IEEE Signal Processing Magazine,2006,23(1):30-40.
[7] WANG Y B,WANG W Q,CHEN H,et al. Optimal frequency diverse subarray design with Cramér-rao lower bound minimization[J]. IEEE Antennas Wireless Propagation Letters,2015(14):1188-1191.
[8] SHAO H,LI J C,CHEN H,et al. Adaptive frequency offset selection in frequency diverse array radar[J]. IEEE Antennas Wireless Propagation Letters,2014,13(1):1405-1408.
[9]项喆,陈伯孝,杨明磊.频率分集雷达最优频率间隔选择方法[J].西安电子科技大学学报(自然科学版),2017,44(4):14-20.XIANG Zhe,CHEN Boxiao,YANG Minglei. Frequency increment optimization method for frequency diverse radar[J].Journal of Xidian University(Natural Science Edition),2017,44(4):14-20.
[10]郑昱.基于频率分集阵列的波束形成研究[J].现代雷达,2015,37(8):29-32.ZHENG Yu. A study on the beam forming of frequency diverse array[J]. Modern Radar,2015,37(8):29-32.
[11] HONG H,MAO X P,HU C. A multi-domain collaborative filter for HFSWR based on oblique projection[C]//2012IEEE Radar Conference. Atlanta GA:IEEE Press,2012:907-912.
[12] CAO B,LIU A J,MAO X P. An oblique projection polarization filters[C]//2008 International Conference on Wireless Communication. Networking and Mobile Computing.Dalian,China:IEEE,2008:1893-1896.
[13] HUANG J,TONG K F,BAKER C J. Frequency diverse array with beam scanning feature[C]//2008 IEEE Antennas and Propagation Society International Symposium. San Diego,CA,USA:IEEE Press,2008:1-4.