Title :
A modified method of frequency and 2-D angle estimation
Author :
Chen Hui ; Wang Yongliang
Author_Institution :
Key Res. Lab, Wuhan Radar Acad., China
Abstract :
A modified method based on uniform circular array for wide frequency band is presented in this paper in order to estimate parameters of signal frequency, azimuth angle and elevation angle. In the method a new matrix, which is called cumulants-based mixed DOA matrix, is formed by the special structure of uniform circular array. Under the condition of sub-nyquist spatio-temporal sampling, we can estimate no ambiguous frequency, and then we can get no ambiguous 2-D angles by general eigen-decomposed of mixed DOA matrix pencil. The modified method can realize the azimuth and elevation angle that are automatically paired with frequency.
Keywords :
Nyquist diagrams; antenna arrays; array signal processing; direction-of-arrival estimation; frequency estimation; higher order statistics; matrix decomposition; 2-D angle estimation; azimuth angle; cumulants-based mixed DOA matrix; elevation angle; frequency estimation; modified method; rotational invariance matrix; sub-Nyquist spatiotemporal sampling; uniform circular array; wide frequency band; Azimuth; Direction of arrival estimation; Frequency estimation; Mutual coupling; Narrowband; Parameter estimation; Radar; Sampling methods; Spatial resolution; Wideband;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1220060
