Research on Ultra-Wideband (UWB) Accurate Positioning under Signal Interference Based on Deep Learning

UWB (Ultra-Wideband) technology is also called "Ultra-Wideband", also known as pulse radio technology. UWB-based positioning technology has real-time indoor and outdoor accurate tracking capabilities, with high positioning accuracy, which can achieve centimeter-level or even millimeter-level positioning. Based on the provided anchor point ranging information, this paper analyzes normal and abnormal data and establishes an accurate positioning model. For task 1, preprocess the data, export the file, delete invalid data, and fill in missing values. For task 2, it is required to establish models for normal and abnormal data respectively. For task 3, it is consistent with the model obtained in task 2. The only difference is that the coordinates of the four anchor points used for the test data have changed. When the target coordinates are calculated, the anchor point coordinates can be replaced to obtain the model required by task 3. For task 4, use the processed data in task one to establish a mathematical model, and train the model through the integrated learning method to determine whether the collected signal is interference. For task 5, first use the integrated learning model in task four to eliminate the interference data in the data, import the eliminated data into the positioning model of task two for positioning, and add Kalman based on interference recognition to the static estimation algorithm.

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Improved energy detection receiver for ranging in IEEE 802.15.4a standard

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078717001088 ◽

2017 ◽

Vol 10 (2) ◽

pp. 141-148

Author(s):

Abdelmadjid Maali ◽

Geneviève Baudoin ◽

Ammar Mesloub

Keyword(s):

Estimation Algorithm ◽

Energy Detection ◽

Ultra Wideband ◽

Line Of Sight ◽

Accurate Estimation ◽

Time Of Arrival ◽

Power Delay Profile ◽

Wideband Signals ◽

Toa Estimation ◽

Ieee 802.15.4A

In this paper, we propose a novel energy detection (ED) receiver architecture combined with time-of-arrival (TOA) estimation algorithm, compliant to the IEEE 802.15.4a standard. The architecture is based on double overlapping integrators and a sliding correlator. It exploits a series of ternary preamble sequences with perfect autocorrelation property. This property ensures coding gain, which allows an accurate estimation of power delay profile (PDP). To improve TOA estimation, the interpolation of PDP samples is proposed and the architecture is validated by using an ultra-wideband signals measurements platform. These measurements are carried out in line-of-sight and non-line-of-sight multipath environments. The experimental results show that the ranging performances obtained by the proposed architecture are higher than those obtained by the conventional architecture based on a single-integrator in both LOS and NLOS environments.

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A Channel Estimation Algorithm of Ultra-wideband System Using Multi-Templates

JOURNAL OF ELECTRONICS INFORMATION TECHNOLOGY ◽

10.3724/sp.j.1146.2009.01462 ◽

2010 ◽

Vol 32 (10) ◽

pp. 2468-2472

Author(s):

Wei Xu ◽

Jia-xiang Zhao ◽

Dong Wang ◽

Xiao-xi Ai

Keyword(s):

Channel Estimation ◽

Estimation Algorithm ◽

Ultra Wideband

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TSLAM: Tethered simultaneous localization and mapping for mobile robots

The International Journal of Robotics Research ◽

10.1177/0278364917732639 ◽

2017 ◽

Vol 36 (12) ◽

pp. 1363-1386 ◽

Cited By ~ 4

Author(s):

Patrick McGarey ◽

Kirk MacTavish ◽

François Pomerleau ◽

Timothy D Barfoot

Keyword(s):

Mobile Robots ◽

Particle Filter ◽

Low Cost ◽

Simultaneous Localization And Mapping ◽

Ground Truth ◽

Anchor Point ◽

Outlier Rejection ◽

Cluttered Environments ◽

Localization And Mapping ◽

Anchor Points

Tethered mobile robots are useful for exploration in steep, rugged, and dangerous terrain. A tether can provide a robot with robust communications, power, and mechanical support, but also constrains motion. In cluttered environments, the tether will wrap around a number of intermediate ‘anchor points’, complicating navigation. We show that by measuring the length of tether deployed and the bearing to the most recent anchor point, we can formulate a tethered simultaneous localization and mapping (TSLAM) problem that allows us to estimate the pose of the robot and the positions of the anchor points, using only low-cost, nonvisual sensors. This information is used by the robot to safely return along an outgoing trajectory while avoiding tether entanglement. We are motivated by TSLAM as a building block to aid conventional, camera, and laser-based approaches to simultaneous localization and mapping (SLAM), which tend to fail in dark and or dusty environments. Unlike conventional range-bearing SLAM, the TSLAM problem must account for the fact that the tether-length measurements are a function of the robot’s pose and all the intermediate anchor-point positions. While this fact has implications on the sparsity that can be exploited in our method, we show that a solution to the TSLAM problem can still be found and formulate two approaches: (i) an online particle filter based on FastSLAM and (ii) an efficient, offline batch solution. We demonstrate that either method outperforms odometry alone, both in simulation and in experiments using our TReX (Tethered Robotic eXplorer) mobile robot operating in flat-indoor and steep-outdoor environments. For the indoor experiment, we compare each method using the same dataset with ground truth, showing that batch TSLAM outperforms particle-filter TSLAM in localization and mapping accuracy, owing to superior anchor-point detection, data association, and outlier rejection.

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EXPERIMENTAL INVESTIGATION OF UWB SIGNAL INTERFERENCE EFFECT BETWEEN UWB COMMUNICATION DEVICE AND VSAT

Jurnal Teknologi ◽

10.11113/jt.v82.13866 ◽

2019 ◽

Vol 82 (1) ◽

Author(s):

Azizi Mohd Ali ◽

Raja Syamsul Azmir Raja Abdullah ◽

Shaiful Jahari Hashim ◽

Mohd Fadlee A. Rasid ◽

Aduwati Sali ◽

...

Keyword(s):

Experimental Investigation ◽

Interference Effect ◽

Interference Mitigation ◽

Ultra Wideband ◽

Signal Interference ◽

Research Trend ◽

Radio Communication ◽

Small Aperture ◽

Communication Device ◽

Uwb Communication

This paper presents the experimental investigation of the Ultra Wideband (UWB) signal interference effect between commercialized UWB communication device (UCD) and Very Small Aperture Terminal (VSAT). Recent research trend shows increase of interest to make use of UWB signal for Internet of Things (IoT) application. It is expected that IoT devices based on UWB technology increases in the future and can become unattended jammer to other services. The analysis involves two sets of experimental set up: i) UWB communication system is the interference victim from narrow band signal and other UWB transmission and ii) signal radiated from UCD devices using UWB signal interfere to other existing radio communication services which in this case a VSAT. The level of interference is evaluated based on the measured bit error rate (BER), round trip time (RTT) and carrier over noise ratio (C/N). The finding from this paper can be used as a guide for new interference mitigation techniques and spectrum planning purposes.

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Ultra-wideband radio technology: Potential and challenges ahead

IEEE Communications Magazine ◽

10.1109/mcom.2003.1215641 ◽

2003 ◽

Vol 41 (7) ◽

pp. 66-74 ◽

Cited By ~ 641

Author(s):

D. Porcino ◽

W. Hirt

Keyword(s):

Ultra Wideband ◽

Radio Technology ◽

Wideband Radio

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Distortion Analysis of Indoor and Outdoor Limit with Biconical Antenna for Ultra Wideband System

Advanced Science Letters ◽

10.1166/asl.2015.6459 ◽

2015 ◽

Vol 21 (10) ◽

pp. 3288-3291

Author(s):

Chairak Deepunya ◽

Sathaporn Promwong

Keyword(s):

Ultra Wideband ◽

Biconical Antenna ◽

Distortion Analysis ◽

Indoor And Outdoor

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Dual Port Antenna Combining Sensing and Communication Tasks for Cognitive Radio

International Journal of Electronics and Telecommunications ◽

10.1515/eletel-2016-0016 ◽

2016 ◽

Vol 62 (2) ◽

pp. 121-127 ◽

Cited By ~ 4

Author(s):

Hamza Nachouane ◽

Abdellah Najid ◽

Abdelwahed Tribak ◽

Fatima Riouch

Keyword(s):

Cognitive Radio ◽

Dynamic Spectrum Access ◽

Antenna System ◽

Ultra Wideband ◽

Impedance Bandwidth ◽

Manufacturing Cost ◽

Communication Task ◽

Wide Range ◽

Radio Technology ◽

Radio Systems

Abstract Dynamic spectrum access has been proposed as the effective solution to overcome the spectrum scarcity issue, supported by cognitive radio technology. Sensing and communication functions are both the most important tasks in cognitive radio systems. In this paper, an antenna system combining sensing and communication tasks is proposed to be integrated into cognitive radio front-ends. The sensing task is performed by means of an ultra-wideband quasi-omnidirectional antenna. Whilst the communication task is ensured by using a narrowband antenna. Both antennas have been designed on the same layer of an FR4 substrate, for manufacturing cost constraint. Therefore, the isolation between them must take into consideration. The measured mutual coupling of less than -18 dB is achieved over the whole impedance bandwidth. The proposed sensing antenna covers a wide range frequency bands ranging from 2 to 5.5 GHz. While the communication antenna operates at 2.8 GHz, and by adding inductors to the antenna, the resonant frequency can be tuned from 2.6 to 2.7 GHz. The whole antenna system was designed, fabricated, and tested. Measurement and simulation results prove the feasibility of the proposed structure for cognitive radio applications.

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CCS: A Railway Corridor Control System Utilizing Ultra Wideband Radio Technology

Joint Rail ◽

10.1115/rtd2004-66015 ◽

2004 ◽

Cited By ~ 1

Author(s):

Paul A. Flaherty

Keyword(s):

Wireless Local Area Network ◽

Local Area Network ◽

Linear Chain ◽

Wide Band ◽

Local Area ◽

Ultra Wideband ◽

Area Network ◽

Radio Technology ◽

A Chain ◽

Uwb Radio

Ultra Wide Band (UWB) radio is a unique technology which combines a megabit wireless local area network with a centimeter-resolution radiolocation (RADAR) capability over distances less than 100 meters. A linear chain of UWB nodes can be used to create a hop-by-hop data transmission network, which also forms a RADAR “corridor” along the chain. By co-locating such a chain of nodes along a railroad right-of-way, precise information on the location and velocity of trains could be distributed throughout the corridor. In addition, the radar corridor would detect the introduction of track obstacles such as rocks, people, and automobiles, as well as shifted loads and other high-wide train defects. Finally, the network of nodes would enable off-train communications with payload sensors, locomotive computers, and could also provide wireless connectivity for passenger service.

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An Emergency Seamless Positioning Technique Based on ad hoc UWB Networking Using Robust EKF

Sensors ◽

10.3390/s19143135 ◽

2019 ◽

Vol 19 (14) ◽

pp. 3135 ◽

Cited By ~ 4

Author(s):

Han ◽

Wang ◽

Liu ◽

Zhang ◽

Yang ◽

...

Keyword(s):

Ad Hoc ◽

High Accuracy ◽

Ultra Wideband ◽

Global Test ◽

Positioning Accuracy ◽

Network Nodes ◽

Outdoor Environments ◽

Positioning Technique ◽

Seamless Positioning ◽

Indoor And Outdoor

In this paper, a new emergency positioning technique is proposed based on ad hoc GNSS/UWB (Global Navigation Satellite System/Ultra-Wideband) network. The main innovations of the program are reflected in two aspects. First of all, a unified coordinate frame for indoor and outdoor environments is constructed dynamically with GNSS/UWB integration. In the outdoor environments, the high accuracy positioning can be achieved with GNSS/UWB equipment. The high-accuracy indoor coordinate is obtained by measuring the range observations between adjacent network nodes and outdoor GNSS/UWB nodes, and the range information of the UWB network is transmitted to the cloud server center. A network adjustment algorithm is proposed to improve the positioning accuracy of the UWB network. Secondly, a UWB indoor location algorithm based on robust EKF (Extended Kalman Filter) is proposed. By analyzing the transfer characteristics of gross error in EKF model, a new robust EKF model is established. The model is constructed based on the statistical characteristics of redundant observation components and prediction residual. The robust equivalent gain matrix is constructed, and the robust positioning solution of UWB is obtained with iteration. The global test is carried out first to further improve the real-time operation efficiency. Finally, a field indoor and outdoor seamless positioning experiment was carried out to verify the effectiveness of the proposed algorithm. The results show that the positioning accuracy of UWB emergency network nodes (anchors) can reach 0.35 m. Based on the network, the positioning accuracy of the tag can reach 0.38 m by applying the improved robust EKF positioning algorithm, which is improved by 20.83% and 73.43% compared with standard EKF and least square method, respectively.

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