| 空时编码阵列时移误差分析 |
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| 引用本文： | 王华柯,廖桂生,许京伟,朱圣棋,曾操. 空时编码阵列时移误差分析[J]. 系统工程与电子技术, 2019, 41(11): 2446-2452. DOI: 10.3969/j.issn.1001-506X.2019.11.07 |
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| 作者姓名： | 王华柯 廖桂生 许京伟 朱圣棋 曾操 |
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| 作者单位： | 西安电子科技大学雷达信号处理国家重点实验室, 陕西 西安 710071 |
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| 摘 要： | 空时编码阵雷达通过在相邻阵元间引入时间延迟,在发射单一波形的条件下可实现全向空域有效覆盖,工程上易于实现。但实际应用中,器件变化会造成时移误差,难以得到准确的时移量。本文研究了时移误差对空时编码阵方向图的影响,定量分析了确定时移误差下的方向图误差并得到闭式表达式,推导了随机时移误差下方向图误差的上限。此外,进一步研究发射方向图响应和多维模糊函数,并结合仿真实验分析时移误差对空间探测范围,距离、角度维分辨率和副瓣电平等特性的影响。
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| 关 键 词： | 空时编码阵 时移误差 方向图误差 模糊函数 |
Impact of time shift errors on space-time coding array |
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| WANG Huake,LIAO Guisheng,XU Jingwei,ZHU Shengqi,ZENG Cao. Impact of time shift errors on space-time coding array[J]. System Engineering and Electronics, 2019, 41(11): 2446-2452. DOI: 10.3969/j.issn.1001-506X.2019.11.07 |
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| Authors: | WANG Huake LIAO Guisheng XU Jingwei ZHU Shengqi ZENG Cao |
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| Affiliation: | National Lab of Radar Signal Processing, Xidian University, Xi’an 710071, China |
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| Abstract: | Space-time coding array (STCA) radar introduces a tiny time shift across array elements. By transmitting an identical waveform, it can form a wide beam with full angular coverage with simplicity in engineering. However, in the practical environment, changes of the system will inevitably induce time shift errors. The impact of time shift error on STCA is studied. We deduce the beampattern error in condition of the deterministic error quantitatively and atttain the closed-form expression. The upper bound in condition of the stochastic error is derived. Besides, we analyze the transmit beampattern response and multi-dimensional ambiguity function to evaluate properties of the spatial coverage, the resolution and sidelobe level in range-angle domain in combination with the simulation results. |
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| Keywords: | space-time coding array (STCA) time shift error beampattern error ambiguity function |
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