Open AccessDesign of large aperture sparse array for mainlobe interference cancellation
Author(s) -
Zhang Honggang,
Liu Wei,
Liu Quanhua,
Yang Jian
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2019.0139
Subject(s) - side lobe , aperture (computer memory) , main lobe , computer science , grating , interference (communication) , sparse array , single antenna interference cancellation , filter (signal processing) , electronic engineering , optics , physics , acoustics , telecommunications , algorithm , antenna (radio) , engineering , computer vision , detector , channel (broadcasting)
Large aperture sparse array has the ability of mainlobe interference suppression. However, sparse array causes grating lobe problem. If the array is steering at the target and the mainlobe interference is located at the grating lobe, the adaptive filter will produce a grating lobe zero phenomenon that severely reduce the target energy. This study proposes a design approach of large aperture sparse array for mainlobe interference cancellation. By properly designing the number of auxiliary receiving antennas, the baseline of the large aperture sparse array, the aperture of auxiliary receiving antennas, the position of auxiliary receiving antennas and carrier frequency of radar transmitting signal, the grating lobes can be suppressed effectively, thus decreasing the system complexity and cost while cancelling the mainlobe interference. Simulations and field experiments have illustrated the effectiveness of the proposed design approach.