数字相控阵天线中的波束合成实现方法

发布时间：2018-03-03 05:12

本文选题：数字相控阵　切入点：波束合成　出处：《计算机仿真》2017年05期 　论文类型：期刊论文

【摘要】：数字相控阵天线是有源相控阵天线发展的重要方向,而信号处理的核心内容是波束合成。但波束合成的工程设计中面临的一些问题,往往通过经验进行处理,并未从理论角度进行分析和解决。首先,针对信号处理硬件平台中的数据采集功能,通过分析ADC噪声来源,并结合输入中频信号SNR、动态、采样处理增益,得到了满足输出SNR要求的最少有效比特位的解析表达。其次,根据数字相控阵阵因子表达,分析了在指向误差对方向图影响,根据天线增益的损失,可以确定指向误差的允许范围。另外,根据空间色散原理,分析了频偏对阵列方向图影响,同样根据天线增益损失,可以确定允许的信号带宽指标。上述指标确定方法,通过计算机仿真证明了正确性和有效性,从而为数字相控阵天线的工程实现,提供了有益的支持。
[Abstract]:Digital phased array antenna is an important direction in the development of active phased array antenna, and the core of signal processing is beam synthesis. However, some problems in the engineering design of beam synthesis are often dealt with by experience. First of all, according to the data acquisition function in the signal processing hardware platform, the source of ADC noise is analyzed, and the if signal is input, dynamic, sampling and processing gain. The analytical expression of the least effective bits satisfying the output SNR requirements is obtained. Secondly, according to the expression of the digital phased array factor, the influence of the pointing error on the opposite direction diagram is analyzed, and the loss of the antenna gain is analyzed according to the loss of the antenna gain. In addition, according to the principle of spatial dispersion, the influence of frequency offset on array pattern is analyzed, and the allowable signal bandwidth index can be determined according to antenna gain loss. The correctness and validity of the digital phased array antenna are proved by computer simulation, which provides a useful support for the engineering implementation of the digital phased array antenna.
【作者单位】：中国电子科技集团公司第十研究所;
【分类号】：TN821.8

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