| 摘要 |
PURPOSE: A signal direction finding method using forward/backward vectors is provided to improve the accuracy of estimation of signal arrival angle and increase the number of signals to divide. CONSTITUTION: A forward vector calculating unit(20) calculates forward vector from data received in a sensor array(10). A backward vector acquisition unit(30) acquires backward vector in the reverse order of the forward vector. A sample signal subspace forming unit(40) constitutes a sample signal subspace using the forward and backward vectors. An arrival angle estimating unit(50) estimates an arrival angle from a base with reference to the sample signal subspace.
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