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Mathematical Problems in Engineering
Volume 2017, Article ID 4792327, 10 pages
Research Article

Fractionally Spaced Constant Modulus Equalizer with Recognition Capability for Digital Array Radar

Array and Information Processing Laboratory, College of Computer and Information, Hohai University, No. 8, West Focheng Road, Jiangning District, Nanjing 211100, China

Correspondence should be addressed to Feng Wang; moc.nuyila@epohgnohij

Received 18 September 2016; Revised 19 January 2017; Accepted 30 January 2017; Published 21 February 2017

Academic Editor: Haranath Kar

Copyright © 2017 Feng Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Fractionally spaced blind equalizer (BE) based on constant modulus criteria is exploited to compensate for the channel-to-channel mismatch in a digital array radar. We apply the technique of recognition to improve the stability and reliability of the BE. The surveillance of the calibration signal and the convergence property of BE are both implemented with recognition description words. BE with cognitive capability is appropriate for the equalization of a digital array radar with thousands of channels and hundreds of working frequencies, where reliability becomes the most concerned indicator. The improvement of performance in the accidental scenarios is tested via numerical simulations with the cost of increased computational complexity.