AoA Positioning Locator

Table of Contents

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1. Introduction

1.1 Purpose& Description

DSGW-200 is an indoor Locator for Bluetooth AoA Positioning. It can reach a positioning accuracy of 0.3-1 meters in the 2D plane. At the same time, it has the characteristics of low power consumption, low delay, low radiation, and strong anti-interference. A signal locator can achieve 2D positioning.

DSGW-200 is suitable for personnel tracking and real-time positioning of assets in smart healthcare, smart factories, smart factories, smart offices, and smart education. 

DSGW-200 also has an IoT gateway function, it supports the Zigbee, Z-wave, and BLE wireless protocol.

1.2 Product Feature Summary

  • Support 5V USB type-c power supply
  • Support IEEE802.3-2012 Type 1, the IEEE802.3-2012 Type 1 requires a power supply device (PSE) to provide 44 to 57V, and the power of the powered device (PD) must not exceed 12.95 W and the current does not exceed 350 mA
  • Support IEEE802.11ac, IEEE802.11a,IEEE802.11n,IEEE802.11g,IEEE 802.11b Protocol
  • Support 4G LTE cat M1
  • Support Bluetooth 5.2
  • Support zigbee3.0
  • Support Z-wave
  • Support LoRa
  • One WAN/LAN variable network port
  • Support USB2.0
  • Backup Li battery

1.3 Hardware Block Diagram

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2. Mechanical Requirement

2.1 Drawings

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2.2 Product Size

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3. Specifications

3.1 Technical Specification

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3.2 Performance Requirement

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4. QA Requirements

4.1 Quality and Testing Information

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5. Application

The gateway has an array antenna, the beacon sends Bluetooth data, and the gateway can receive or send Bluetooth signals when switching between different antennas.

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Antenna array design
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Angle of arrival operation

Measure and detect the phase difference of the Bluetooth signal between different receiving antennas, and then calculate the angle of arrival of the signal based on this information and the known distance between the different antennas.

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Derive AoA from the phase difference of different antenna signals

AoA technology only provides relative azimuth and/or elevation angle data between the sending and receiving devices, and other information is needed to calculate the absolute X, Y, and Z coordinates of the Bluetooth asset tag. The figure shows the mechanism to achieve this calculation. In this example, the receiver coordinates and direction are known, and AoA is used to derive azimuth and elevation data from the Bluetooth asset tag.

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Determine the X, Y, and Z coordinates of the Bluetooth asset tag from the known location of the Bluetooth receiver and the azimuth and elevation information generated by AoA

There are other ways to calculate the X, Y, and Z coordinates of the tracked device, such as using multiple receivers to detect the signal sent by the asset tag and then using triangulation or trilateral measurement to calculate the asset location.

System structure

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6. I/Q data

Elevation, RSSI, Azimuth, Distance

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7. Application scenarios

  • Real-time tracking of the elderly and children
  • Product tracking
  • Tool management
  • Indoor navigation
  • Asset positioning

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