Monopulse angle estimation with adaptive array based on 
monopulse response curve fitting
CHEN Chengzeng， WU Jianxin， WANG Tong， WU Yifeng
Journal of Systems Engineering and Electronics . 2013, (7): 1403 -1408 .  DOI: 10.3969/j.issn.1001-506X.2013.07.9