Title :
Maximum likelihood estimation of direction of arrival and frequency sweeping rate with linear chirp signals
Author :
Chung, Tien-Ho ; Cheung, John Y.
Author_Institution :
Sch. of Electr. Eng., Oklahoma Univ., Norman, OK, USA
Abstract :
The paper presents a 1D maximum likelihood (ML) estimation procedure for both the direction of arrival /spl part/ and the frequency sweeping rate /spl alpha/ of a linear chirp signal impinging upon an M-element linear array. The estimates can be obtained by globally maximizing the likelihood function of the observed data on the /spl alpha//spl sim//spl part/ plane. To reduce the heavy 2-D ML computational load, a 1D ML procedure to search for the global maximum along the reduced 1D search space is proposed.<>
Keywords :
computational complexity; direction-of-arrival estimation; maximum likelihood estimation; 1D maximum likelihood estimation procedure; computational load; direction of arrival; element linear array; frequency sweeping rate; global maximum; linear chirp signals; reduced 1D search space; search; Additive noise; Chirp; Direction of arrival estimation; Frequency estimation; Gaussian noise; Maximum likelihood estimation; Noise level; Sampling methods; Senior members;
Journal_Title :
Signal Processing Letters, IEEE
