| 摘要: |
| 针对传统线性调频连续波雷达在低空超高速运动平台的高度测量中高度表会受多普勒徙动和距离徙动影响的问题，提出了一种脉冲频移调频体制的发射波形，利用回波特性抵消多普勒徙动和距离徙动，结合移位能量归一化变换（Shift Normalized Energy Transform，SNET) 自适应测高算法，在满足系统测高精度的前提下大大提高了计算效率，满足系统实时性要求。软件仿真证明了所提的发射波形和算法的正确性。 |
| 关键词: 低空超高速运动平台 自适应测高 移位能量归一化变换（SNET) |
| DOI： |
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| 基金项目: |
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| An altimetry algorithm for low altitude and ultra-high speed moving platform |
| ZHANG Wenxin |
| (School of Automation,Beijing Information Science and Technology University,Beijing 100192,China) |
| Abstract: |
| When used to measure the altitude of ultra-high speed moving platform,the altimeter of traditional linear frequency modulation continuous wave(LFMCW) radar is affected by Doppler error and quadratic phase.In this paper,a launch waveform of pulse frequency modulated shift keying(PFMSK) system is presented.The characteristics of echo is used to offset Doppler error and high phase term,and adaptive Shift Normalized Energy Transform(SNET) arithmetic is used to measure the altitude.Under the premise of satisfying the high precision of measurement,the proposed method greatly improves the calculation efficiency and satisfies the real-time requirement of the system.The correctness of the proposed waveform and algorithm is proved by software simulation. |
| Key words: low altitude ultra-high speed moving platform adaptive height measurement shift normalized energy transform（SNET) |
《电讯技术》编辑部 