Title :
Piecewise Root-MUSIC
Author :
Withers, Lang, Jr.
Author_Institution :
E-Syst. Inc., Falls Church, VA, USA
Abstract :
A piecewise version of the Root-MUSIC algorithm to find the directions of multiple narrowband plane waves arriving at an antenna array is presented. The problem of choosing low-SNR signal roots from extra roots in Root-MUSIC is addressed by dividing the unit circle into several sectors. The response of an arbitrary planer array over each sector is modeled with a low-order Fourier series, permitting a MUSIC polynomial to be constructed for each sector. The resulting version of Root-MUSIC is more accurate and has fewer outliers (missed directions) than the original one-piece version at low SNRs, and is faster when implemented using parallel processors
Keywords :
antenna arrays; radio direction-finding; signal detection; signal processing; MUSIC polynomial; Root-MUSIC algorithm; SNR; antenna array; direction finding; low-order Fourier series; multiple narrowband plane waves; parallel processors; piecewise Root-MUSIC; planer array; unit circle; Least squares approximation; Multiple signal classification; Narrowband; Planar arrays; Polynomials; Sensor arrays; Signal to noise ratio; Silicon carbide; Transmission line matrix methods; Vectors;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-0003-3
DOI :
10.1109/ICASSP.1991.150160
