Indoor Environment Device-Free Wireless Positioning using IR-UWB Radar

<p>Impulse Radio Ultra-Wideband (IR-UWB) radar is a type of radar functioning based on UWB transmission technology that uses an exceedingly wide bandwidth low power impulse signal to continuously transmitting and receiving the impulse signal for object detection within a range. To date, most of the proposed Ultra-Wideband (UWB) transmission technology based object positioning estimation systems for indoor environment depends on objects to be attached with an active UWB devices. In certain circumstances, it is ideal to track objects in passive manner without the requirement of any attached tracking devices or device-free object positioning estimation. IR-UWB radar has shown promising utilization in realizing device-free object positioning estimation for indoor environment. With this motivation, in this paper a work on weighted least squares consideration for IR-UWB radar based device-free object positioning estimation for indoor environment is presented.</p>

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A Compact UWB Indoor and Through-Wall Radar with Precise Ranging and Tracking

International Journal of Antennas and Propagation ◽

10.1155/2012/678590 ◽

2012 ◽

Vol 2012 ◽

pp. 1-11 ◽

Cited By ~ 11

Author(s):

Yinan Yu ◽

Jian Yang ◽

Tomas McKelvey ◽

Borys Stoew

Keyword(s):

Signal Processing ◽

Theoretical Analysis ◽

Short Range ◽

Indoor Environment ◽

Low Cost ◽

Moving Target ◽

Radiation Characteristics ◽

Uwb Radar ◽

Signal Processing Algorithms ◽

Processing Algorithms

Ultrawideband (UWB) technology has many advantages compared to its narrowband counterpart in many applications. We present a new compact low-cost UWB radar for indoor and through-wall scenario. The focus of the paper is on the development of the signal processing algorithms for ranging and tracking, taking into account the particular properties of the UWB CMOS transceiver and the radiation characteristics of the antennas. Theoretical analysis for the algorithms and their evaluations by measurements are presented in the paper. The ranging resolution of this UWB radar has achieved 1-2 mm RMS accuracy for a moving target in indoor environment over a short range, and Kalman tracking algorithm functions well for the through-wall detection.

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UWB Based Detection with Fractional Fourier Transform

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.679.107 ◽

2013 ◽

Vol 679 ◽

pp. 107-111

Author(s):

Abdul Waheed

Keyword(s):

Fourier Transform ◽

Computer Aided Design ◽

Indoor Environment ◽

Fractional Fourier Transform ◽

Radar System ◽

Human Beings ◽

Uwb Radar ◽

Sign Detection ◽

Aided Design ◽

Difference Time

The importance of UWB radar system for indoor applications is of keen interest. Applications such as across the wall monitoring, through wall detection, intrusion detection and under rubble vital sign detection are of cumulative interest and are also used in modern rescue systems to help the trapped human beings, along with detection and activity monitoring across the wall. In this paper we have studied across the wall detection of presence of different objects by applying the fractional Fourier transform. Computer aided design based simulations for indoor environment are accomplished by using finite difference time domain solution for Maxwell’s equations. Finally, fractal analysis is realized for the collected signals reflected from the objects present across the wall.

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Preliminary Analysis of Organic Wireless Positioning System in an Indoor Environment

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/705/1/012032 ◽

2019 ◽

Vol 705 ◽

pp. 012032

Author(s):

A H Ismail ◽

J S Ngo ◽

M I Taib ◽

M S M Hashim ◽

M S M Azmi ◽

...

Keyword(s):

Preliminary Analysis ◽

Indoor Environment ◽

Positioning System ◽

Wireless Positioning

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Design and Implementation of Directional Sensors for Privacy-Ensured Device-Free Target Localization in Indoor Environment

Wireless Communications and Mobile Computing ◽

10.1155/2019/8391307 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8

Author(s):

Ata ur Rehman ◽

Zeeshan Ellahi ◽

Asif Iqbal ◽

Farman Ullah ◽

Ahmed Ali ◽

...

Keyword(s):

Radio Frequency ◽

Indoor Environment ◽

Signal Strength ◽

Received Signal Strength ◽

Target Localization ◽

Ism Band ◽

Design And Implementation ◽

Directional Sensors ◽

Device Free ◽

Improved Accuracy

This paper presents two radio frequency (RF) sensors with different directivities designed and tested for device-free localization (DFL) in an indoor environment. Mostly, in smart homes and smart offices, peoples may be irritated by wearing the device on them all the time. As compared with device-based localization, the proposed sensors can localize both cooperative and non-cooperative targets (intruders and guests etc.) without privacy leakages. Both sensors are tested to detect the change in received signal strength (ΔRSS) due to the presence of an obstacle. RF sensors, i.e., antennas are designed to operate in the ISM band of 2.4–2.5 GHz. Experimental results show that the sensor with higher directivity provides better ΔRSS that helps in improved accuracy to detect a device-free target.

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