Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers (1994)
Pacific Grove, CA, USA
Oct. 31, 1994 to Nov. 2, 1994
Tien-Ho Chung , Sch. of Electr. Eng., Oklahoma Univ., Norman, OK, USA
J.Y. Cheung , Sch. of Electr. Eng., Oklahoma Univ., Norman, OK, USA
In this paper, we propose a fast maximum likelihood estimation (FMLE) to estimate the direction of arrival (DOA) /spl theta/ and the frequency sweeping rate (FSR) /spl alpha/ of a linear chirp signal impinging upon an M-elements linear sensor array from a far-field source. The estimators /spl theta/ and /spl alpha/ of a chirp signal can be estimated by globally maximizing the likelihood function on the /spl theta//spl sim//spl alpha/ plane. The global maximum is located on a ridge of the 2-D /spl theta//spl sim//spl alpha/ plane. To reduce the heavy 2-D ML computation, we propose an algorithm of 1-D FMLE to search for the global maximum only along the ridge.<
direction-of-arrival estimation, maximum likelihood estimation, computational complexity
Tien-Ho Chung and J. Cheung, "Direction finding estimation for linear chirp signal," Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers(ACSSC), Pacific Grove, CA, USA, 1995, pp. 653-656.