雙圈均勻圓陣互耦自校正方法

張佳佳; 陳輝; 李帥; 季正燕

doi:10.11999/JEIT161137

雙圈均勻圓陣互耦自校正方法

doi: 10.11999/JEIT161137

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出版歷程
- 收稿日期: 2016-10-25
- 修回日期: 2017-02-26
- 刊出日期: 2017-07-19

Self Calibration of Mutual Coupling for Dual Uniform Circular Array

摘要

摘要: 該文基于雙圈均勻圓形陣列，提出一種互耦自校正算法，對(duì)圓陣內(nèi)部和圓陣之間的互耦進(jìn)行了同時(shí)校正。算法利用雙圈均勻圓陣特殊的互耦矩陣特性，對(duì)角度信息和互耦系數(shù)進(jìn)行解耦合，用較少的計(jì)算量依次估計(jì)出信號(hào)角度和互耦系數(shù)，完成級(jí)聯(lián)估計(jì)。算法減少了搜索維數(shù)且無(wú)需互耦系數(shù)矩陣的任何先驗(yàn)信息，也不需要額外的輔助校正源，簡(jiǎn)單易實(shí)現(xiàn)。理論分析和仿真結(jié)果均表明所提算法精度高、分辨力強(qiáng)，可以有效地解決雙圈均勻圓陣的互耦問(wèn)題。
- 雙圈圓陣 /
- 波達(dá)方向估計(jì) /
- 互耦 /
- 自校正
Abstract: Based on the dual uniform circular array, a self-calibration algorithm is proposed in the presence of mutual coupling, which can calibrate the mutual coupling in circular array and between two circular arrays at the same time. The algorithm utilizes the special mutual coupling matrix characteristic of dual uniform circular array to decouple angle information and mutual coupling coefficients. With less amount of calculation, the signal angle and the mutual coupling coefficients are estimated in turn. Finally, the cascade estimation is completed. The algorithm reduces the dimension of searching without any prior information about mutual coupling coefficient matrix and need not extra auxiliary source. So it can be easily implemented. Theory analysis and simulation results illustrate that the new algorithm has high precision and resolution, hence, it can effectively solve the problem of mutual coupling for the dual circular array.
- Dual circular array /
- Direction of Arrival (DOA) estimation /
- Mutual coupling /
- Self-calibration

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