| 摘要: |
| 受幅度和相位的不一致影响，星载分布式雷达在目标区域的合成效率会随着幅相误差的存在而发生变化。本文在场叠加原理和数理统计方法的基础上，建立了随机幅度相位误差与合成效率之间的理论关系，并仿真分析了在幅度和相位误差分别满足均匀分布、指数分布和正态分布条件下的发射相参效率变化规律。结果表明，所建立的模型可用于分析随机幅度和相位误差对发射相参合成效率的影响，幅相误差的增大会导致发射相参合成效率降低，且随着节点数不断增加，相位误差对合成效率的影响也随之增加。 |
| 关键词: 星载分布式雷达 发射相参 随机误差 合成效率 |
| DOI： |
| 分类号:TN958 |
| 基金项目: |
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| Impact analysis for random error on combination efficiency of coherent emission in distributed space-based radar |
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| Abstract: |
| Due to inconsistency of the amplitude and phase, the coherent combination efficiency of space-based distributed radar in the target area will change with the amplitude and phase errors. In this paper, a theoretical relationship between random amplitude-phase errors and expected combination efficiency is established based on the superposition principle and statistical methods. The variation characteristics of combination efficiency of coherent emission are explained under the condition of uniform, exponential, and normal distributions of amplitude and phase errors by simulation. The result indicated that the model can be used to analyze the influence of random amplitude-phase errors on combination efficiency of coherent emission. The combination efficiency decrease with the amplitude-phase errors, and the impact of phase error on combination efficiency increases as the number of array nodes increases. |
| Key words: space-based distributed radar, coherent transmitting, random error, combination efficiency |