Direction-of-Arrival Method Based on Randomize-Then-Optimize Approach |
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Authors: | Cai-Yi Tang Sheng Peng Zhi-Qin Zhao Bo Jiang |
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Affiliation: | 1. Science and Technology on Electronic Information Control Laboratory, Chengdu, 610036, China;2. School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China;3. The 54th Research Institute of China Electronics Technology Group, Shijiazhuang, 050081, China |
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Abstract: | The direction-of-arrival (DOA) estimation problem can be solved by the methods based on sparse Bayesian learning (SBL). To assure the accuracy, SBL needs massive amounts of snapshots which may lead to a huge computational workload. In order to reduce the snapshot number and computational complexity, a randomize-then-optimize (RTO) algorithm based DOA estimation method is proposed. The “learning” process for updating hyperparameters in SBL can be avoided by using the optimization and Metropolis-Hastings process in the RTO algorithm. To apply the RTO algorithm for a Laplace prior, a prior transformation technique is induced. To demonstrate the effectiveness of the proposed method, several simulations are proceeded, which verifies that the proposed method has better accuracy with 1 snapshot and shorter processing time than conventional compressive sensing (CS) based DOA methods. |
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Keywords: | Compressive sensing (CS) randomize-then-optimize (RTO) single snapshot sparse signal reconstruction |
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