一种基于旋转测量的阵列幅相误差校正新方法

doi:10.11999/JEIT161058

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Abstract

It is not easy to accurately measure the direction angles of calibration-source signals, which limits the precision of array active-calibration methods. On the other hand, passive-calibration methods are difficult to apply to the presence of large array errors, which severely limits their practical applications. This paper proposes a rotation measurement-based method to calibrate array gain-phase errors, which can achieve high calibration precision without measuring the direction angles of calibration-source signals. Using the known array-rotation angles, the maximum likelihood-based method is able to simultaneously estimate the array gain-phase errors, direction angles and complex amplitudes of calibration-source signals without ambiguity. Compared with accurately measuring the direction angles of calibration-source signals, accurately measuring the array-rotation angles is much easier to be accomplished with a special test turntable, thus the proposed method can achieve quite high calibration precision at a low cost. Some simulation tests demonstrate the effectiveness and generality of the proposed method.

Key words： Array calibration Gain-phase errors Calibration precision Rotation measurement Test turntable

Received: 12 October 2016 Published: 18 May 2017

PACS:

TN911.7

Fund:

The Director Foundation of The State Key Laboratory of CEMEE (CEMEE2014Z0101B), The National Natural Science Foundation of China (U1333106, 61331012, 61371197), The National Key R&D Plan (2016YFB0502403)

Corresponding Authors: CHENG Feng E-mail: cwing@whu.edu.cn

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	CHENG Feng
	GONG Ziping
	ZHANG Chi
	WAN Xianrong

Cite this article:

CHENG Feng,GONG Ziping,ZHANG Chi等. A New Rotation Measurement-based Method for Array Gain-phase Errors Calibration[J]. JEIT, 2017, 39(8): 1899-1905.

URL:

http://jeit.ie.ac.cn/EN/10.11999/JEIT161058 OR http://jeit.ie.ac.cn/EN/Y2017/V39/I8/1899

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