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一种幅度量化误差补偿策略
李万珅,张达凯,刘胤凯,李熙民,冯孝斌
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(电磁散射重点实验室，北京100854)

摘要:

为了降低幅度量化对阵列天线性能的影响，以对数字衰减器控制的一维等间距侧射阵进行泰勒加权为例，仿真分析常见的量化策略对方向图副瓣电平及增益损耗的影响。提出一种统计平均意义下增益保持的适当二可能值法幅度量化误差补偿策略，可在保证增益损耗偏移量统计平均为零的前提下降低幅度量化误差对副瓣电平的影响。在此基础上对量化决策概率进行实时更新，得到改进的增益保持的适当二可能值法，在保持改进前副瓣电平水平的基础上进一步降低了增益损耗偏移量。最后将其推广至可分离型二维阵列，并给出目前工作的不足及进一步研究的建议。

关键词: 阵列天线阵列方向图幅度量化误差补偿

DOI：

基金项目:

A compensation strategy for amplitude quantization error

LI Wanshen,ZHANG Dakai,LIU Yinkai,LI Ximin,FENG Xiaobin

(Science and Technology on Electromagnetic Scattering Laboratory，Beijing 100854，China)

Abstract:

In order to reduce the impact of amplitude quantization on the array antenna performance,the effects of common quantization strategies on the side lobe level(SLL) and gain loss of the pattern are simulated and analyzed by applying the Taylorweighting to the onedimensional equalspaced sidefire array controlled by the digital attenuator.An amplitude quantization error compensation strategy of appropriate twopossiblevalues method for gain hold in the sense of statistical average is proposed.This strategy can reduce the influence of amplitude quantization error on the SLL under the premise of ensuring that the statistical average of gain loss offset is zero.And on this basis,by updating the quantized decision probability in real time,an improved method is obtained.On the basis of maintaining the improved front SLL level before improvement,the gain loss offset is further reduced.This strategy provides a reference for the amplitude quantification of the low SLL array antenna.Finally,the proposed method is extended to a separable twodimensional array,and the shortcomings of the current work and suggestions for further research are given.

Key words: array antenna array pattern amplitude quantization error compensation