2-D DOA Estimation of LFM Signals Based on Sparse Representation in Fractional Fourier Domain

DOI

10.2991/iset-15.2015.39How to use a DOI?

Keywords

LFM signal, DOA estimation, Fractional fourier transform, Sparse recovery

Abstract

For the problem of two dimensional direction of arrival (2-D DOA) estimation of Liner Frequency Modulated (LFM) signals, a novel 2-D DOA estimation method is proposed based on sparse representation in fractional Fourier domain. First, utilizing the energy-concentrated characteristic of fractional Fourier transform for LFM signals, the redundant dictionaries based on the space angles are established in fractional Fourier domain. Then the space angles can be estimated by sparse recovery algorithm respectively. Finally, the azimuth and elevation angles are calculated through the estimated space angles. The proposed method has a better estimation precision, high-resolution performance and lower SNR threshold without multidimensional search process. The validity of the proposed method is verified by theoretic analysis and simulation results.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Zhibo Shen
AU  - Songyang Liu
AU  - Yangyang Dong
AU  - Guoqing Zhao
AU  - Chunxi Dong
PY  - 2015/03
DA  - 2015/03
TI  - 2-D DOA Estimation of LFM Signals Based on Sparse Representation in Fractional Fourier Domain
BT  - Proceedings of the First International Conference on Information Science and Electronic Technology
PB  - Atlantis Press
SP  - 155
EP  - 159
SN  - 2352-538X
UR  - https://doi.org/10.2991/iset-15.2015.39
DO  - 10.2991/iset-15.2015.39
ID  - Shen2015/03
ER  -