机构

• 地理科学与资源研究所 [1]
• 长春光学精密机械与物... [1]

采集方式

• OAI收割 [2]

内容类型

• 会议论文 [1]
• 期刊论文 [1]

发表日期

• 2020 [1]
• 2012 [1]

学科主题

筛选

浏览/检索结果: 共2条，第1-2条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Variability in spatial-temporal recharge under the observed and projected climate: A site-specific simulation in the black soil region of Russia 期刊论文  OAI收割 JOURNAL OF HYDROLOGY, 2020, 卷号: 590, 页码: 10 作者:  Pozdniakov, Sergey P.;  Vasilevsky, Peter Yu;  Grinevskiy, Sergey O.;  Lekhov, Vladimir A.;  Sizov, Nikolay E.   |  收藏  |  浏览/下载：31/0  |  提交时间：2021/03/15 Recharge  Black soil  Climate change  Historical simulation  Projected simulation  General Circulation Models   Improved TOPS about direction of arrival estimation for wideband signals (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Vibration, Structural Engineering and Measurement, ICVSEM2011, October 21, 2011 - October 23, 2011, Shanghai, China 作者:  He B. 收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25 The study about the direction-of-arrival (DOA) estimation for wideband signals is a basic topic of Signal Processing. The method called test of orthogonality of projected subspaces (TOPS) does not require initial values to form focusing matrix compared with the coherent signal subspace method (CSSM)  but it has poor performance for coherent wideband signals at low signal-to-noise ratio (SNR). Based on the lack of the conventional TOPS  this paper reconstructs a set of new matrices with the narrowband correlated matrices coming from the DFT decomposition of the array output and modifies the method frame of the conventional TOPS. So we get a set of reconstructed matrices with full rank corresponding to each frequency bin  and which have no array aperture loss. The improved TOPS can estimate the DOA for coherent wideband sources at low SNR  and enhances the performance of the conventional TOPS. Simulation results show that the improved TOPS is effective  and the total performance of which is similar to the rotational signal-subspace (RSS) method. (2012) Trans Tech Publications.