FRFT Based Method to Estimate DOA for Wideband Signal

Abstract:

This paper presents a new direction-of-arrival (DOA) estimation for wideband sources, using fractional Fourier transform with fitting angle (F3A). Unlike other coherent wideband methods, the new method does not require any preprocessing for initial values and decomposing into narrowband components. This new technique estimates DOA by rotating the time frequency plate with the fitting angle to fit the time frequency distribution approximately. The algorithm can be applied to arbitrary shaped one dimensional or two dimensional arrays. The signal frequency can be higher than the frequencies in many wideband algorithms. The performance of this wideband technique is compared with that of the new method through simulations. The simulations show that this new technique performs better than others, while this algorithm does not apparently vary with signal-to-noise ratio (SNR).

• Periodical: Advanced Materials Research (Volumes 712-715)
• Pages: 2716-2720
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.712-715.2716
• Online since: June 2013
• Authors: Wei Yang, Yao Wu Shi
• Keywords: Array Signal Processing, Broadband Logarithmic Chirp Signal, Direction of Arrival (DOA) Estimation, Fractional Fourier Transform (FrFT)

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