DOA Estimation Based on the Improved Direct Data Domain Method with One Sample
XIE Hu①② DANG Hongxing① TAN Xiaomin① FENG Dazheng②
①(Xi’an Branch, China Academy of Space Technology, Xi’an 710100, China) ②(National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China)
Many of the high-resolution Direction Of Arrival (DOA) estimation methods fail to estimate the DOAs of incoming signals and distinguish the two close signals under small sample support; especially only one snapshot is available. To handle this problem, a novel DOA method based on improved Direct Data Domain (D3) technique is proposed. The basic ideal of the proposed method is to augment the time domain samples by sacrificing the space domain degree. Firstly, by splitting the entire array into many overlapping sub-array, many low-dimension samples can be obtained. Secondly, utilizing the property of far-filed narrowband signal that its amplitude response on each array is the same, a new constraint is imposed. Experimental results indicate that the resolution of the propsed method is superior to the conventional algorithms.
解虎,党红杏,谭小敏,冯大政. 小样本下基于改进的直接数据域方法的DOA估计方法[J]. 电子与信息学报, 2016, 38(9): 2371-2376.
XIE Hu, DANG Hongxing, TAN Xiaomin, FENG Dazheng. DOA Estimation Based on the Improved Direct Data Domain Method with One Sample. JEIT, 2016, 38(9): 2371-2376.
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