一种基于低秩特征的调频序列矩阵降噪与目标检测方法

CORC > 沈阳自动化研究所 > 中国科学院沈阳自动化研究所 > 智能检测与装备研究室

	一种基于低秩特征的调频序列矩阵降噪与目标检测方法
	王伟; 杜劲松; 毕欣; 高洁; 赵越南; 田星; 仝盼盼; 张青石; 李想; 徐洪庆
	2015-09-16
专利国别	中国
专利号	CN104914417A
专利类型	发明
产权排序	1
权利人	中国科学院沈阳自动化研究所
其他题名	Low-rank characteristic-based frequency modulation sequence matrix noise reduction and target detection method
中文摘要	本发明涉及一种基于低秩特征的调频序列矩阵降噪与目标检测方法，包括以下步骤：连续获取L个周期的接收信号，进行下混频至基带，得到L个周期的差拍信号为；进行离散采样，得到L行N列的矩阵S；通过两组随机取样，分别进行核范数优化求解，降噪结果S'；对矩阵S'的每一行作N_FFT点FFT得到矩阵S_R；对矩阵S_R的每一列作L_FFT点FFT，得到矩阵S_RD；对矩阵S_RD进行二维平均单元-有序统计恒虚警检测，提取目标的距离和速度；本发明根据信号的低秩特征，可以应用矩阵填充理论对矩阵进行核范数优化求解，实现二维矩阵的降噪，有效改善信噪比，通过二维平均单元-有序统计恒虚警检测，改进多普勒域的噪声估计，有效解决多目标检测问题。
是否PCT专利	否
英文摘要	The invention relates to a low-rank characteristic-based frequency modulation sequence matrix noise reduction and target detection method. The method includes the following steps that: received signals of L periods are continuously obtained, and the received signals are down-converted to a base band, and beat signals of L periods can be obtained; discrete sampling is performed on the beat signals, so that an L-row and N-column matrix S can be obtained; based on two sets of random sampling, nuclear norm optimization solution is performed obtained matrixes respectively, and a noise reduction result S' can be obtained; N-point FFT is performed on each row of the matrix S', so that a matrix SR can be obtained; N-point FFT is performed on each column of the matrix SR, so that a matrix SRD can be obtained; and two-dimensional average unit-ordered statistics constant false alarm rate detection is performed on the matrix SRD, and the distance and speed of a target are extracted. According to the method of the invention, nuclear norm optimization solution can be performed on the matrixes through utilizing a matrix filling theory according to the low-rank characteristics of signals, and therefore, noise reduction of the two-dimensional matrix can be realized, and a signal to noise ratio can be improved effectively; and based on the two-dimensional average unit-ordered statistics constant false alarm rate detection, noise estimation in Doppler domain can be improved, and problems existing multi-target detection can be solved.
申请日期	2015-05-15
语种	中文
专利申请号	CN201510252982.8
专利代理	沈阳科苑专利商标代理有限公司 21002
内容类型	专利
源URL	[http://ir.sia.cn/handle/173321/17021]
专题	沈阳自动化研究所_智能检测与装备研究室
推荐引用方式 GB/T 7714	王伟,杜劲松,毕欣,等. 一种基于低秩特征的调频序列矩阵降噪与目标检测方法. CN104914417A. 2015-09-16.