Novel Frequency and DOA Estimation with Sub-Nyquist Spatio-temporal Sampling ⋆
نویسندگان
چکیده
In this paper, we firstly construct a wide-band undersampling array, then present a novel frequency and direction of arrival (DOA) estimation method for a very wide frequency band (2-18GHz). Choosing a set of appropriate sampling frequencies and antenna spacing, the method can provide unambiguous frequency and DOA estimation under the sub-Nyquist spatio-temporal sampling. The proposed method can reduce the computational complexity as it does not need the 2-D spectral peak search and high-dimensional eigen decomposition. In addition, the proposed method uses the temporal filtering to cascade the frequency estimation and DOA estimation so that the DOA estimation results are automatically paired with corresponding frequency. Simulation results demonstrate the effectiveness of the novel method.
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