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  • 标题:MT-BCS-Based DoA and Bandwidth Estimation of Unknown Signals through Multiple Snapshots Data
  • 本地全文:下载
  • 作者:Shi Hui Zhang ; Qing He Zhang ; Li Ping Shi
  • 期刊名称:International Journal of Antennas and Propagation
  • 印刷版ISSN:1687-5869
  • 电子版ISSN:1687-5877
  • 出版年度:2020
  • 卷号:2020
  • 页码:1-7
  • DOI:10.1155/2020/6179280
  • 出版社:Hindawi Publishing Corporation
  • 摘要:

    The Direction-of-Arrival (DoA) and bandwidth (BW) estimation strategy impinging on a linear array using multiple snapshots data is addressed within the multitask Bayesian Compressive Sensing (MT-BCS). The DoA estimation is used as the reconstruction of sparse signal constrained by the Laplace prior through multitask Bayesian Compressive Sensing. Receiving wideband signal data through linear array, the space is divided into I parts according to the equal interval. The data of interest are assumed to be represented as I-dimensional vector, and the wideband signal can be reconstructed accurately using only a small number M . The receiving antenna operates in the frequency range f min , f max . Starting from the voltages measured at the output of the array elements at a multiple time instants at f p = f min + Δ f , p = 1 , … , P , the retrieval of the DoAs is addressed by means of a customized strategy based on MT-BCS in order to correlate the solutions obtained over different frequency samples. The bandwidth of the signals is obtained as a byproduct by identifying at which frequencies the MT-BCS estimations include a signal along the i th ( i = 1,…, I ) sampling direction. From the outputs of different frequencies, we can know the DoA and BW of signals. A preliminary numerical result is reported to show the behavior of the proposed approach in multiple snapshots data.

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