scholarly journals Device-Free Indoor Location Estimation System Using Commodity Wireless LANs

2021 ◽  
Author(s):  
Yuan Zhou ◽  
Minseok Kim ◽  
Hideaki Momose ◽  
Satoru Yasukawa
Keyword(s):  
Low Cost ◽  
Wireless Lans ◽  
Estimation Method ◽  
Location Estimation ◽  
Mimo Channel ◽  
Indoor Location ◽  
Channel Sounder ◽  
Position Detection ◽  
Estimation System ◽  
Device Free

In recent years, since the propagation channel characteristics have been effectively used for applications such as motion sensing, position detection, etc. A great deal of attention is attracted to channel sounding methods easy to utilize using low-cost devices. This paper presents a device-free indoor location estimation method using spatio-temporal features of radio propagation channels using the 2.4-GHz band 3-by-3 MIMO channel sounder developed using commodity wireless LANs. The measurement results demonstrated a reasonable performance of the proposed method with small number of antennas.

scholarly journals Device-Free Indoor Location Estimation System Using Commodity Wireless LANs

Telecom ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 181-198
Author(s):  
Yuan Zhou ◽  
Minseok Kim ◽  
Hideaki Momose ◽  
Satoru Yasukawa
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Estimation Method ◽  
Location Estimation ◽  
Mimo Channel ◽  
Area Network ◽  
Indoor Location ◽  
Position Detection ◽  
Estimation System ◽  
Device Free

In recent years, propagation channel characteristics have been effectively used in several applications such as motion sensing and position detection. Considerable attention has been paid to channel-sounding methods that are easy to utilize using low-cost devices. This paper presents a device-free indoor location estimation method using the spatio-temporal features of radio propagation channels using a 2.4 GHz-band three-by-three multiple-input-multiple-output (MIMO) channel sounder developed using commodity wireless local area network (WLAN). The measurement results demonstrated a reasonable performance of the proposed method with a small number of antennas.

Research on the Alarm Device Based on the Expert Control Algorithm

2014 ◽  
Vol 716-717 ◽  
pp. 1168-1171
Author(s):  
Lan Xiang Liu ◽  
Wei Jing Zhang
Keyword(s):  
Control Algorithm ◽  
Estimation Method ◽  
Location Estimation ◽  
Technical Problems ◽  
Expert Control ◽  
Position Detection ◽  
Experimental Parameters ◽  
Actual Design ◽  
Position Type ◽  
The Stability

This paper summarizes the position detection and location estimation method, and it has a analysis of the position type alarm classification and related technical problems based on that; Position type alarm system related control algorithm is proposed and the related design, combined with the actual design of the circuit debugging steps and specific experimental parameters is given, the practice shows that the stability and reliability of design.

scholarly journals DEVELOPMENT OF DIRECTIONALCHANNEL SOUNDER USING USRPAND GNU RADIO

2017 ◽  
Vol 7 (1) ◽  
pp. 69-79
Author(s):  
Tianyang Min ◽  
Kentaro Saito ◽  
Jun-ichi Takada
Keyword(s):  
Measurement System ◽  
Low Cost ◽  
Software Radio ◽  
Mimo Channel ◽  
Channel Measurements ◽  
Gnu Radio ◽  
Transmission Performance ◽  
Propagation Channel ◽  
Channel Sounder ◽  
Mimo Transmission

MIMO channel sounding is essential for evaluating the MIMO transmission performance in real propagation environments. In this paper, we have developed a versatile channel sounder by using the GNU Radio and Universal Software Radio Peripheral (USRP) platform and the virtual antenna array method. The developed channel sounder is low cost and can be utilized flexibly for measurements in the UHF band. The performance of the developed channel sounder was validated through a T-junction cable connected test and an indoor channel measurement. The result showed that the performance quite agreed with the measurement of a VNA-based measurement system. The developed channel sounder is expected to be utilized for various kinds of propagation channel measurements.

scholarly journals Source Geolocation in Urban Environments Using Multipath Fingerprinting

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Ram M. Narayanan ◽  
Brian R. Phelan ◽  
Erik H. Lenzing
Keyword(s):  
Mobile Communications ◽  
A Priori ◽  
Estimation Method ◽  
Location Estimation ◽  
Estimation Accuracy ◽  
Time Of Arrival ◽  
Angle Of Arrival ◽  
Feature Vectors ◽  
Area Of Interest ◽  
Estimation System

A method for determining the location of Global Systems for Mobile Communications (GSM) mobile transmitters is proposed. Our approach estimates the location of a source without the use of multilateration or Line-of-Sight (LOS) techniques. A Multipath Characteristic Database (MCD) containing the multipath feature vectors, for each possible transmitter location within an area of interest, is populated via ray-tracing software simulations. The multipath characteristics of interest are angle-of-arrival (AOA) (azimuth) and time-of-arrival (TOA). By minimizing the “distance” between estimated and simulated multipath feature vectors, an estimate for the actual source location can be obtained. The development of the estimation method is presented, followed by a detailed analysis of its estimation accuracy. Since the proposed method utilizes a simulated multipath signature database based upon the knowledge of the environment and the terrain, the need fora priorisoundings from the area of interest is eliminated, thus making this location estimation system suitable for application in denied territories. Location accuracies compare favorably with the requirements for the location of wireless 9-1-1 callers as recommended by the Federal Communications Commission (FCC).

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