[C07] J. Kim, H. J. Yang, and J. Chun, “Sidelobe suppressing beamforming using linearly constrained adaptive arrays for low angle tracking,” in Proceedings on IEEE Asilomar Conference on Signals, Systems, and Computers, Pacific Groove, CA, Oct. 2008, pp. 407-410.
Low angle tracking has been widely studied to solve multipath effect which can be a serious problem in radar systems. Zoltowski suggested a 3-D beamspace maximum likelihood estimation scheme which can simply find the angle of arrival (AOA) of a target from a quadratic equation. However, this scheme has drawbacks such as fixed beam pattern and relatively high sidelobe. This paper proposes a new beamforming scheme using the linearly constrained adaptive arrays. The proposed scheme generates a beam pattern which can overcome previous scheme by providing low sidelobe using adaptive structure resulting robust estimation. Numerical results are provided to show the improved performances.