Adaptive Chirp Beamforming for Direction-of-Arrival Estimation of Wideband Chirp Signals in Sensor Arrays

Jeong-Soo KIM  Byung-Woong CHOI  Eun-Hyon BAE  Kyun-Kyung LEE  

IEICE TRANSACTIONS on Communications   Vol.E91-B   No.8   pp.2757-2760
Publication Date: 2008/08/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.8.2757
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Antennas and Propagation
chirp signal,  adaptive beamforming,  DOA estimation,  uniform linear array,  

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An adaptive chirp beamforming method is proposed to solve the bias problem in the direction-of-arrival (DOA) estimation of wideband chirp signals that have identical time-frequency parameters yet emanate from different directions. The proposed method, based on the steered minimum variance (STMV) method, exploits the time-frequency structure of a chirp signal to improve the DOA estimation performance by effectively suppressing the wideband chirp interferences causing the bias. Simulations are performed to demonstrate the effectiveness of the proposed method.