A Direction of Arrival Estimation Method for Wideband LFM Signals Based on RWT and ESPRIT Algorithm

Abstract:

In this paper, we proposed a new algorithm to estimate the direction of arrival (DOA) for wideband linear frequency modulation (LFM) signals, using Radon-Wigner transform (RWT) and estimation of signal parameter via rotational invariance techniques (ESPRIT). To eliminate the cross-terms, we first utilize the RWT with its excellent time-frequency concentration performance. Then, through peak searching, the number of targets, the initial interference and the frequency modulation slope are estimated. On the this base, the array signals are reconstructed. Finally, we adopt the ESPRIT algorithm to estimate the DOA of the array signals. The simulation results show that the proposed algorithm can estimate the DOA of non-stationary signals with high precision.

• Periodical: Advanced Materials Research (Volumes 1044-1045)
• Pages: 976-981
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1044-1045.976
• Online since: October 2014
• Authors: Jian Zhong Xu*, Fu Qiang Yu, Ping Guang Duan, Shu Hua Li
• Keywords: Direction of Arrival Estimation, ESPRIT, Linear Frequency Modulation Signals, Radon-Wigner Transform

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