Channel calibration for digital array radar in the presence of amplitude-phase and mutual coupling errors

Weixing Li; Yue Zhang; Jianzhi Lin; Zengping Chen

doi:10.1117/12.2194626

21 October 2015 Channel calibration for digital array radar in the presence of amplitude-phase and mutual coupling errors

Weixing Li, Yue Zhang, Jianzhi Lin, Zengping Chen

Author Affiliations +

Proceedings Volume 9651, Millimetre Wave and Terahertz Sensors and Technology VIII; 96510J (2015) https://doi.org/10.1117/12.2194626
Event: SPIE Security + Defence, 2015, Toulouse, France

Abstract

Amplitude-phase errors and mutual coupling errors among multi-channels in digital array radar (DAR) will seriously deteriorate the performance of signal processing such as digital beam-forming (DBF) and high resolution direction finding. In this paper, a combined algorithm for error calibration in DAR has been demonstrated. The algorithm firstly estimates the amplitude-phase errors of each channel using interior calibration sources with the help of the calibration network. Then the signals from far field are received and the amplitude-phase errors are compensated. According to the subspace theories, the relationship between the principle eigenvectors and distorted steering vectors is expressed, and the cost function containing the mutual coupling matrix (MCM) and incident directions is established. Making use of the properties of MCM of uniform linear array, Gauss-Newton method is implied to iteratively compute the MCM and the direction of arrival (DOA). Simulation results have shown the effectiveness and performance of proposed algorithm. Based on an 8-elements DAR test-bed, experiments are carried out in anechoic chamber. The results illustrate that the algorithm is feasible in actual systems.

Citation Download Citation

Weixing Li, Yue Zhang, Jianzhi Lin, and Zengping Chen "Channel calibration for digital array radar in the presence of amplitude-phase and mutual coupling errors", Proc. SPIE 9651, Millimetre Wave and Terahertz Sensors and Technology VIII, 96510J (21 October 2015); https://doi.org/10.1117/12.2194626

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Calibration

Error analysis

Antennas

Distortion

Radar

Computer simulations

Data analysis

Show All Keywords

Keywords/Phrases

Search In:

Publication Years