Title :
Adaptive beamforming for low-angle target tracking under multipath interference
Author :
Dongmin Park ; Eunjung Yang ; Soyeon Ahn ; Joohwan Chun
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea
Abstract :
Angle of arrival estimation of a low-altitude target over the sea surface is a difficult problem due to the multipath coherent interference from the image target. We present a new monopulse technique utilizing an iterative interference cancellation algorithm based on the array antenna structure to overcome performance degradation. Our algorithm is compared with the maximum likelihood estimator, as well as with the existing algorithm employing the specular reflected error finding function.
Keywords :
antenna arrays; array signal processing; direction-of-arrival estimation; interference suppression; iterative methods; maximum likelihood estimation; target tracking; adaptive beamforming; angle of arrival estimation; array antenna structure; image target; iterative interference cancellation algorithm; low-altitude target; maximum likelihood estimator; monopulse technique; multipath coherent interference; specular reflected error finding function; Estimation; Interference; Mathematical model; Radar; Sea surface; Surface waves;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.2014.130185
