Title :
Angle-of-arrival estimation error due to the presence of coherent multipath planewaves
Author :
Shahmirian, V. ; Kesler, S.B.
Author_Institution :
Dept. of Phys./Electron. Eng., Scranton Univ., PA, USA
Abstract :
An analysis is presented of the performance of a singular valued decomposition (SVD) based method for estimating the angles of arrival of the radiating sources. This method, proposed by R. Kumaresen and D.W. Tufts (see IEEE Trans. Aerosp. Elect. Syst. vol.AES-19, p.134-139, Jan. 1983), is called the modified forward-backward linear production (MFBLP) and is based on the SVD of the data matrix. As a result of forward-backward averaging, the coherency between two coherent multipath signals is removed to the extent that, the intersignal correlation becomes a function of the cosine of the constant phase angle. The MFLB method is analyzed in the presence of two coherent multipath signals, and an expression for the RMS error of the estimated angle-of-arrival is derived in terms of physical parameters such as signal-to-noise ratio, the angle separation the constant phase, and number of snapshots.<>
Keywords :
error analysis; filtering and prediction theory; radio direction-finding; radiowave propagation; signal detection; signal processing; RMS error; angle separation; angles of arrival; coherent multipath planewaves; coherent multipath signals; constant phase angle; cosine; data matrix; estimation error; forward-backward averaging; intersignal correlation; modified forward-backward linear production; radar signal processing; radiating sources; signal-to-noise ratio; singular valued decomposition; snapshots; Covariance matrix; Estimation error; Least squares methods; Nonlinear filters; Performance analysis; Signal analysis; Vectors;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1988. AP-S. Digest
Conference_Location :
Syracuse, NY, USA
DOI :
10.1109/APS.1988.94044
