摘要
针对目标极化特性测量,尤其是大动态单目标极化特性的测量问题,同时极化测量波形的设计需着重考虑其波形隔离度。首先,从模糊函数的角度出发定义波形隔离度。然后,针对波形隔离度这个指标,讨论双频矢量脉冲信号、正负斜率线性调频信号和全极化OFDM信号等典型极化测量波形的隔离度性能,重点分析了多普勒频移对波形隔离度的影响。最后对不同波形下波形隔离度的影响因素及性能指标进行比较,给出了这几种极化测量波形的适用场景,对同时极化测量波形的设计与选择具有一定指导意义。
Aiming at measuring the polarization characteristic of target, especially the fast moving and single target, waveform isolation should be mainly considered in designing simultaneous polarimetric waveform. First of all, waveform isolation is defined from the perspective of ambiguity function. Then, as for the indicator of waveform isolation, this paper discusses the isolation performance of typical simultaneous polarimetric waveform, including frequency shifted pulse waveform, up-down slope LFM waveform and fully polarimetric OFDM waveform. It also mainly analyzes the influence of the Doppler frequency shift on waveform isolation. Finally, the influence factors and the performance indicators of waveform isolation of different waveforms are compared for the suitable applications of different polarimetric waveforms. This paper is of great significance for the design and choice of simultaneous polarimetric waveforms.
出处
《雷达科学与技术》
2013年第4期379-384,共6页
Radar Science and Technology
基金
国家自然科学基金重点项目(No.60736006)
国家自然科学基金青年科学基金项目(No.60802078)
关键词
极化雷达
同时极化
波形设计
波形隔离度
polarimetric radar
simultaneous polarization
waveform design
waveform isolation
