A New Rotation Measurement-based Method for Array Gain-phase Errors Calibration

CHENG Feng; GONG Ziping; ZHANG Chi; WAN Xianrong

doi:10.11999/JEIT161058

Volume 39 Issue 8

Aug. 2017

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CHENG Feng, GONG Ziping, ZHANG Chi, WAN Xianrong. A New Rotation Measurement-based Method for Array Gain-phase Errors Calibration[J]. Journal of Electronics & Information Technology, 2017, 39(8): 1899-1905. doi: 10.11999/JEIT161058

Citation:

CHENG Feng, GONG Ziping, ZHANG Chi, WAN Xianrong. A New Rotation Measurement-based Method for Array Gain-phase Errors Calibration[J]. Journal of Electronics & Information Technology, 2017, 39(8): 1899-1905. doi: 10.11999/JEIT161058

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A New Rotation Measurement-based Method for Array Gain-phase Errors Calibration

doi: 10.11999/JEIT161058

Funds:

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

Received Date: 2016-10-12
Rev Recd Date: 2017-04-24
Publish Date: 2017-08-19

Abstract

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.
- Array calibration,
- Gain-phase errors,
- Calibration precision,
- Rotation measurement,
- Test turntable

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References(35)

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