Wang Feifan, Deng Bin, Yang Qi, Wang Hongqiang, Zhang Ye
College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China.
Sensors (Basel). 2020 Aug 20;20(17):4701. doi: 10.3390/s20174701.
Millimeter-wave technology has been widely used in near range targets imaging scenarios, such as mechanical scanning and multiple input multiple output (MIMO) array imaging. Emerging scanning array regimes increase the need for fast-speed and high-quality imaging techniques, which, however, are often subject to specific array positions. Moreover, the relationship between array positions and the imaging performance is not clear, which leads to no uniform standard for array design. In this paper, a series of array configurations are designed to explore the impact of different array positions on the cross-range imaging performance. Meanwhile, a novel fast fully focused imaging algorithm with wavenumber domain properties is presented, which is not constrained by the positions of the transmitters and receivers. Simulation and experimental results show that, compared with a conventional algorithm, the proposed algorithm has a faster imaging speed under the same imagining quality. This study provides a feasible method for fast fully focused imaging in the case of location-constrained MIMO arrays, or partially damaged transceivers.
毫米波技术已广泛应用于近程目标成像场景，如机械扫描和多输入多输出（MIMO）阵列成像。新兴的扫描阵列方式增加了对高速和高质量成像技术的需求，然而，这些技术往往受特定阵列位置的限制。此外，阵列位置与成像性能之间的关系尚不明确，这导致阵列设计没有统一的标准。本文设计了一系列阵列配置，以探索不同阵列位置对横向成像性能的影响。同时，提出了一种具有波数域特性的新型快速全聚焦成像算法，该算法不受发射机和接收机位置的约束。仿真和实验结果表明，与传统算法相比，该算法在相同成像质量下具有更快的成像速度。本研究为位置受限的MIMO阵列或部分受损收发器情况下的快速全聚焦成像提供了一种可行的方法。
