Intelligent metasurface system for automatic tracking of moving targets and wireless communications based on computer vision

Abstract

The fifth-generation (5G) wireless communication has an urgent need for target tracking. Digital programmable metasurface (DPM) may offer an intelligent and efficient solution owing to its powerful and flexible controls of electromagnetic waves and advantages of lower cost, less complexity and smaller size than the traditional antenna array. Here, we report an intelligent metasurface system to perform target tracking and wireless communications, in which computer vision integrated with a convolutional neural network (CNN) is used to automatically detect the locations of moving targets, and the dual-polarized DPM integrated with a pre-trained artificial neural network (ANN) serves to realize the smart beam tracking and wireless communications. Three groups of experiments are conducted for demonstrating the intelligent system: detection and identification of moving targets, detection of radio-frequency signals, and real-time wireless communications. The proposed method sets the stage for an integrated implementation of target identification, radio environment tracking, and wireless communications. This strategy opens up an avenue for intelligent wireless networks and self-adaptive systems.

Research Progress of Large Viewing‐Area 3D Holographic Near‐Eye Display

“…In the past decades, the metasurface has been widely studied in the military, communication, optical design, and many other fields. [88,89] In the holographic display, the thin metasurface can offer almost arbitrary control for shaping the wavefront into any profile at the nanoscale, allowing more precise modulation of the wavefront. Thus, the combination of holography technology with nano-metasurface has become increasingly attractive for researchers in recent years.…”

Skin-Attachable and Stretchable Patch Antenna with Fractal Design for Remote On-Body Motion Sensing

“…Continuous monitoring of human motion is an essential element in the physical condition evaluation of human and human–machine interactions. − With the emergence of stretchable electronics, various types of stretchable strain sensors have been employed in human motion detection owing to their unique advantages, such as conformal attachment on the skin and high accuracy. − For most stretchable strain sensors, the detection of human motion relies on the conversion of device deformation with the body movement to the change of electric signals, such as resistance − and capacitance. − In on-body scenarios, realizing the wireless transmission of these electric signals is a key to achieving convenient implementations of human motion detection devices. − However, the originally collected electric signals, which are normally analogue ones, have to be digitalized and processed for storage and transmission by back-end functional circuits. − The difficulties caused by the significant increase of components, such as power consumption and conformal integration with the human skin, prevent the human motion detector from realizing the miniaturization and reliability in the applications.…”

Simultaneously Intelligent Sensing and Beamforming Based on an Adaptive Information Metasurface

“…Intelligent metasurfaces driven by a closedloop system, typically including a sensing module, a microcontroller unit (MCU) loaded with specific algorithms, a control board, and a metasurface array, exhibit the capacity to achieve versatile advanced functions. [27][28][29][30][31][32][33] Previously, the metasurfaces integrated with various sensors, including gyroscope, [29] depth camera, [34] visible-light detectors, [35] infrared light sensors, [36] ultrasonic detectors, [37] and memory material [38] were proposed. However, these sensors need to be equipped with extra peripheral circuits, which limits the integration level of the metasurfaces.…”