High-precision single-snapshot target arrival angle estimation method under lens array

Abstract

The invention discloses a high-precision single-snapshot target arrival angle estimation method under a lens array, relates to the technical field of array signal processing, and aims to solve the problems that in the prior art, DoA is continuously distributed in the space, array element arrangement of the lens array is fixed, energy of arrival signals can be inevitably diffused into the whole array, therefore, energy leakage is caused, and estimation performance loss is further caused. According to the method, the hardware complexity and the energy consumption of the large-scale MIMO system are greatly reduced, and meanwhile, the estimation performance is ensured not to have obvious loss. DoA estimation under a single snapshot condition can be realized under a lens array system. The estimation performance loss caused by the inherent energy leakage problem of the lens array is effectively solved, and the DoA estimation precision is greatly improved.

Description

technical field [0001] The invention relates to the technical field of array signal processing, in particular to a high-precision single-snapshot target arrival angle estimation method under a lens array. Background technique [0002] Estimation of target angle of arrival based on antenna array is widely used in many fields such as radar, sonar, wireless communication and imaging. In highly dynamic environments such as autonomous driving, due to rapid changes in relative distance, velocity, and angle, only a part of data snapshots (even a single snapshot) can be used to estimate DoA, which leads to the failure of traditional spatial spectrum estimation algorithms. By exploiting the spatial sparsity of arriving signals, compressive sensing techniques have been applied to solve the single-snapshot problem in recent years. However, when the real target orientation is not exactly located at the pre-set discrete grid points, the compressive sensing algorithm will generate base m...

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Problems solved by technology

[0005] The purpose of the present invention is: because DoA is continuously distributed in space in the prior art, and the array element arrangement of lens array is fixed, so the energy of arriving signal will diffuse in the whole array inevitably, thereby cause Energy leakage, which leads to the loss of estimation performance, proposes a high-precision single-shot target angle-of-arrival estimation method under the lens array

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