光学与光电技术, 2018, 16 (1): 71, 网络出版: 2018-03-21  

残留时延对天线组阵窄带信号合成性能影响分析

Influence Analysis of Narrowband Signal Combining Performance on Antenna Arraying upon the Residual Delay
作者单位
北京航天飞行控制中心, 北京 100094
摘要
为分析天线组阵窄带信号合成性能受残留时延影响的程度,给出了残留时延对合成性能影响的理论分析方法。首先建立了残留时延分布特性的仿真模型,详细描述了模型的设计思路。然后通过公式推导,提出了残留时延对窄带信号合成损失影响的理论公式。最后仿真并对比分析了不同参数条件下残留时延对窄带信号合成性能的影响,给出了残留时延引起的相位差的标准差与合成损失的关系,验证了理论公式的正确性。结果表明,残留时延引起的相位差越大,对窄带信号合成损失的影响也越大,若要求合成损失小于0.1 dB,则相位差的标准差约小于8.7°(约0.15 rad)。该方法的提出和运用有助于确定残留时延对窄带信号合成损失影响的上下限。
Abstract
The theoretical method is given on the residual delay in order to analyze the influence that residual delay upon the performances of antenna arraying signal combining. First of all, the simulation model of distribution characteristics is built on the residual delay and a detailed description of design ideas is presented. Then theoretical formula of the narrowband signal combining loss is presented on the residual delay through the derivation. Finally, the influence on narrowband signal combining performance is simulated and analyzed caused by the residual delay. The relation between the combining loss with the standard deviation of phase difference caused by residual delay is given. The correctness of the theoretical formula is verified. The results show that the greater the phase difference caused by residual delay, the greater the impact of the narrowband signal combining losses. The standard deviation of the phase difference is less than about 8.7°(approximately 0.15rad) to require the combining loss to be less than 0.1 dB. The upper and lower limits of residual delay of the narrowband signal combining loss are determined by this method.

杜黎明, 王俊彦, 杨喆, 杨与杰. 残留时延对天线组阵窄带信号合成性能影响分析[J]. 光学与光电技术, 2018, 16(1): 71. DU Li-ming, WANG Jun-yan, YANG Zhe, Yang Yu-jie. Influence Analysis of Narrowband Signal Combining Performance on Antenna Arraying upon the Residual Delay[J]. OPTICS & OPTOELECTRONIC TECHNOLOGY, 2018, 16(1): 71.

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