Title :
A Robust Capon Method to Improve Weather Radar Range Resolution Using Oversampling
Author :
Li, Xuehua ; He, Jianxin ; Wang, Jiang ; Si, Zhao
Author_Institution :
Key Lab. of Atmos. Sounding, Chengdu Univ. of Inf. Technol., Chengdu, China
Abstract :
Range resolution enhancement technique using oversampling based on capon method has been verified to reconstruct finer resolution for weather radar, however the performance degrades as the number of samples reduce, further analysis shows that the degradation is caused by the spread of noise subspace eigenvalues of the covariance matrix. A robust capon method based on diagonal loading has been postulated and implemented to resolve this problem, computer simulation has proved that smaller standard deviation can be obtained in the less number of samples, as a result, less dwell time for antenna in weather radar is needed.
Keywords :
covariance matrices; eigenvalues and eigenfunctions; meteorological radar; radar imaging; radar resolution; covariance matrix; diagonal loading; noise subspace eigenvalues; oversampling; range resolution enhancement; reconstruct finer resolution; robust capon method; weather radar range resolution; Computer simulation; Covariance matrix; Degradation; Eigenvalues and eigenfunctions; Loaded antennas; Meteorological radar; Noise reduction; Noise robustness; Performance analysis; Radar antennas;
Conference_Titel :
Information Engineering and Computer Science, 2009. ICIECS 2009. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4994-1
DOI :
10.1109/ICIECS.2009.5363371
