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Compressive sensing based two-dimensional DOA estimation for high frequency surface wave radar. (Chinese. English summary) Zbl 1389.94075

Summary: To achieve accurate angle estimation of targets in high frequency surface wave radar (HFSWR), a two-dimensional direction-of-arrival (2-D DOA) estimation method based on compressive sensing with a single snapshot in range-Doppler (RD) domain is proposed. The theoretical feasibility of estimating DOA in RD domain and the benefits of processing with a single snapshot are analyzed. Based on subspace pursuit, an approach of angle pair matching and correction after dimensionality reduction is proposed for L-shaped array. It eliminates invalid angle pairs and ensures correct matching even under conditions of low signal-to-noise ratio (SNR) or nearly equal echo amplitudes. Therefore, accurate 2-D DOA estimations accompanied with resolving targets in spatial domain are realized. Simulation results and experiment results of practical HFSWR data verify the performance advantages and effectiveness of the proposed method respectively.

MSC:

94A12 Signal theory (characterization, reconstruction, filtering, etc.)
93E10 Estimation and detection in stochastic control theory
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