Precise DOA Estimation Using SAGE Algorithm with a Cylindrical Array

DOI Web Site 参考文献5件
  • TAKANASHI Masaki
    Graduate School of Information Science and Technology, Hokkaido University
  • NISHIMURA Toshihiko
    Graduate School of Information Science and Technology, Hokkaido University
  • OGAWA Yasutaka
    Graduate School of Information Science and Technology, Hokkaido University
  • OHGANE Takeo
    Graduate School of Information Science and Technology, Hokkaido University

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A uniform circular array (UCA) is a well-known array configuration which can accomplish estimation of 360° field of view with identical accuracy. However, a UCA cannot estimate coherent signals because we cannot apply the SSP owing to the structure of UCA. Although a variety of studies on UCA in coherent multipath environments have been done, it is impossible to estimate the DOA of coherent signals with different incident polar angles. Then, we have proposed Root-MUSIC algorithm with a cylindrical array. However, the estimation performance is degraded when incident signals arrive with close polar angles. To solve this problem, in the letter, we propose to use SAGE algorithm with a cylindrical array. Here, we adopt a CLA Root-MUSIC for the initial estimation and decompose two-dimensional search to double one-dimensional search to reduce the calculation load. The results show that the proposal achieves high resolution with low complexity.

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