For the instability problem of high resolution bearing estimation based on subspace, according to the accumulated number of stable estimating covariance matrix and the check indices difference of each subspace, a subspace bearing estimation method based on check indices judgment was proposed.Firstly, covariance matrix was obtained after phase compensation in time domain, the stability impact of space data on the subspace decomposition method was reduced.Then, according to the spatial spectrum check indices difference of each subspace, the judgment statistics was obtained.Lastly, the impact of background noise on final synthetic spatial spectrum was reduced via judge statistics.The results of numerical simulation and measured data show that: compared to the high resolution bearing estimation method, this method can statistically reduce the impact of space unsteady data on covariance matrix estimation, and reduce the demand of subspace decomposition method for minimum input signal-to-noise ratio by the processing of statistical judgment.
杨丽，沈统，秦洁. 基于检测指数判决的子空间方位估计方法[J]. 振动与冲击, 2021, 40(4): 114-119.
YANG Li，SHEN Tong，QIN Jie. A subspace bearing estimation method based on check indices judgment. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(4): 114-119.
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