基于正交频率分集的目标全极化瞬时测量方法

Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (11): 2587-2591 .

基于正交频率分集的目标全极化瞬时测量方法

刘勇,李永祯,王雪松

国防科学技术大学电子科学与工程学院，湖南长沙 410073

出版日期:2009-11-26 发布日期:2010-01-03

Target full polarization instantaneous measurement based on orthogonal frequency division

LIU Yong,LI Yong-zhen,WANG Xue-song

School of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China

Online:2009-11-26 Published:2010-01-03

摘要/Abstract

摘要：

针对当前雷达目标瞬时全极化测量方法仅限于窄带应用的不足，结合正交频率分集复用原理，设计了一种用于宽带全极化瞬时测量的雷达信号波形。通过选择合适的测量频点、测量频差等参数，可在频域消除子载波互扰误差，获取雷达目标在各测量频点的极化散射矩阵。在建立回波信号模型基础上，给出了极化散射矩阵估计算法，并分析了多普勒频移补偿误差对测量结果的影响。仿真结果表明，当信噪比大于5 dB时，极化散射矩阵在各测量频点的相对测量误差小于-20 dB，验证了该方法的有效性。

Abstract:

To overcome the defect that current target full polarization instantaneous measurement methods only applied in narrowband situation, a novel radar waveform is designed for wideband full polarization instantaneous measurement based on principle of orthogonal frequency division. It can eliminate mutual interference in frequency domain and obtain target polarization scattering matrix at each measuring frequency by choosing proper measuring frequency and frequency difference. Based on scattering signal model, the estimation algorithm is obtained, and effect of doppler frequency compensation error on measurement result is analyzed. Simulation results show that relative measurement error at each measuring frequency is smaller than -20 dB (SNR>5 dB), which verifies the validity of this method.

刘勇,李永祯,王雪松. 基于正交频率分集的目标全极化瞬时测量方法[J]. Journal of Systems Engineering and Electronics, 2009, 31(11): 2587-2591 .

LIU Yong,LI Yong-zhen,WANG Xue-song. Target full polarization instantaneous measurement based on orthogonal frequency division[J]. Journal of Systems Engineering and Electronics, 2009, 31(11): 2587-2591 .