A5063699964- Vehicular Ad Hoc Networks (VANETs)
- Millimeter-Wave Propagation and Modeling
- Power Line Communications and Noise
- Opportunistic and Delay-Tolerant Networks
- Traffic control and management
- Autonomous Vehicle Technology and Safety
- Indoor and Outdoor Localization Technologies
- Mobile Ad Hoc Networks
- Advanced MIMO Systems Optimization
- Bluetooth and Wireless Communication Technologies
- Advanced Measurement and Detection Methods
- Microwave Imaging and Scattering Analysis
- RFID technology advancements
- Digitalization, Law, and Regulation
- Transportation Planning and Optimization
- Geophysical Methods and Applications
- Advanced Wireless Communication Techniques
- Video Surveillance and Tracking Methods
- Wireless Body Area Networks
- UAV Applications and Optimization
- Wireless Sensor Networks and IoT
- Advanced Adaptive Filtering Techniques
- Transportation Systems and Safety
- Robotics and Sensor-Based Localization
- Internet of Things and Social Network Interactions
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2016-2024
Chang'an University
2021
ORCID
2019
Future advanced driver assistance systems require an accurate and up-to-date picture of the surrounding environment for applications such as forward collision assistants or adaptive cruise control. Today, relative position other objects with respect to ego-vehicle is obtained on-board ranging sensors, radar. By adding communication capabilities future vehicles, cooperative approaches can offer a complementary source information. This paper proposes fusion framework in which positioning...
Vehicle-to-Pedestrian (V2P) communication is essential to enable a reliable collision avoidance system for vehicles and vulnerable road users (VRUs). In order develop accurate channel models are required. However, no dedicated model V2P in critical scenarios has been proposed so far. To model, we conducted wideband sounding measurements considering typical scenario between vehicle pedestrian line-of-sight (LoS) non-LoS (NLoS) situations. The measurement data used study the characteristics of...
The radio channel modeling and location system are the focus of many research fields. However, their performance is largely limited by line-of-sight (LOS) non-line-of-sight (NLOS) conditions. Currently, most popular LOS/NLOS identification algorithm based on impulse response (CIR) feature. decision threshold applied to identify between LOS NLOS conditions this basis. features around usually very similar, which leads low accuracy. In letter, feature extracted from CIR used fit its...
To design and evaluate vehicle-to-vehicle (V2V) communication systems in intelligent transportation system (ITS), it is important to understand the propagation mechanisms channel models of V2V channels. This paper aims analyze at 5.2 GHz for highway environment obstructed line-of-sight (OLoS) (LoS) scenarios, particularly vehicle connectivity probability derivation based on model obtained from measurement. First, path loss (PL), shadow fading (SF), narrowband K-factor, small-scale amplitude...
Thousands of fatalities among pedestrians are caused every year by traffic accidents. Vehicle-to-pedestrian (V2P) communication promises to prevent accidents enabling collision avoidance application. To develop and test a V2P communications system, accurate knowledge the propagation channel is essential. However, only limited analysis have been reported in literature. fill this gap, German Aerospace Center conducted an extensive sounding measurements campaign controlled environment. The were...
Vehicle-to-Vehicle (V2V) communication can significantly enhance the performance of collision avoidance systems through periodically exchanging information between vehicles. At urban intersections, effect shadowing caused by buildings has a severe influence on performance. In addition, an increased traffic density near intersection creates high level interference, which lead to degradation. this paper, we evaluate IEEE 802.11p based V2V for cooperative at intersections. We focus impact from...
Vehicle‐to‐vulnerable‐road‐user (V2VRU) communications have the ability to provide of awareness both vehicles and vulnerable road users prevent accidents. An accurate V2VRU channel model in critical accident scenarios is essential develop a reliable system. Therefore, extensive wideband single‐input single‐output measurement campaigns at 5.2 GHz were carried out open‐field urban environments. Accident prone between vehicle cyclist as well pedestrian are considered. In this study, locations...
Vehicular ad hoc network (VANET) brings an excellent solution to ensure road safety and transportation efficiency in critical environment like tunnel. Particularly, radio link connectivity of vehicle-to-vehicle (V2V) significantly influences the performance VANETs. The communication range systems is a random variable reality due channel fading effect. Therefore, model between vehicles realistic key for accurate evaluation system performances. In this paper, we study V2V presence randomness...
In the new envisaged paradigm of vehicular communications, critical safety applications have strict requirements in terms latency and robustness due to nature their mission that require periodic status exchange asynchronous event notifications for a reliable cooperative awareness. Current technologies like IEEE 802.11p recent solutions fixed period beaconing or moderately reactive adaptive approaches do not cope with these lead scalability problems high density scenarios. With aim avoiding...
Many Advanced Driver Assistance Systems rely on an accurate self-localization. This is usually provided by Global Navigation Satellite (GNSS) along with on-board sensors, such as inertial speed wheel-tick sensors and steering wheel angle sensors. However, this approach suffers from incremental error growth when long GNSS outages occur. Additionally, it widely accepted that has a poor performance in urban-like environments due to satellite line-of-sight blockage, signal attenuation multipath...
The profound knowledge of wireless propagation is essential for communication between vehicles. To evolve and test standards we need channel models in representative environments to neither over-, nor underestimate the effect surrounding environment movement vehicles; typical railway are station, open field hilly environments. We introduce train-to-train (T2T) path loss large scale fading statistics based on sounder measurement data as a first step towards geometry-based stochastic model...
Dynamic route planning is one of the ITS efficiency applications that reduce travel time and energy consumption. To perform efficient planning, real-time traffic information should be collected disseminated to vehicles on other road segments. vehicular ad-hoc networks (VANETs) are a promising technology can provide communication means deliver required information. In this paper, we study evaluate three state-of-the-art dissemination protocols in realistic scenarios. The evaluated...
Vehicle platooning, where vehicles drive in a convoy with small relative distance, is promising technology for road transportation. In particular, Electric Vehicles (EVs), platoon of EVs (e-platoon) can help not only reduce energy consumption but also allow them to exchange and charge their battery from moving electric source on the fly. E-platooning requires Vehicle-to-Vehicle (V2V) communication very frequent information high reliability between vehicles. This poses big challenge system...
Tunnel environment is a critical that requires high safety. Particularly, obstructions by vehicles in tunnel may significantly influence the performances of wireless applications. This article presents vehicle-to-vehicle channel measurement campaign using wideband sounder. The measured frequency band centered at 5.2 GHz with bandwidth 120 MHz. Both partial and full are considered campaign. Based on data, path loss model, K-factor diffraction different scenarios analyzed. results show...
Direct vehicle-to-vulnerable road users (V2VRU) communication can prevent accidents by providing 360° awareness and improving detection, localization, tracking of both vehicles VRUs. Having a realistic channel is prerequisite for developing reliable V2VRU system. In order to parameterize geometry-based stochastic model (GSCM), it important determine the length local quasi-stationarity regions. Therefore, in this work, non-stationarity analyzed estimating generalized scattering function...
The trend towards urbanization increases the need for highly available public transportation. Nevertheless, majority of society demands individual transport too. To address these in urban areas, intelligent transportation systems (ITS) aim at increasing capacity and safety while reducing costs, accidents, environmental impact. that end, both railway industry automotive focus on automation, digitization, wireless communications to cope with numbers vehicles passengers. These two industries...
This paper proposes a novel road surveillance system for vehicular safety applications based on wideband channel characteristics. Using signals from road-side communication infrastructure as illuminators of opportunity non-cooperative users can be detected and located. In this regard, sounding measurement campaign was performed measuring signal propagation at C-band. To isolate the characteristics including deterministic timevariant scatterers, measurements were taken in controlled...
Electric Vehicles (EVs) nowadays suffer from range anxiety due to their short driving and long battery recharging time. One solution mitigate problem is by reducing the unnecessary stop-and-go events reduce energy consumption. Cooperative Adaptive Cruise Control (CACC) one of Vehicular Ad-hoc NETworks (VANETs) applications that can provide safe smooth driving. In VANETs, all vehicles share state information periodically transmitting Awareness Messages (CAMs) neighbors using...
The tunnel environment is a semi-enclosed space, the electromagnetic wave propagation characteristics are very different from typical outdoor and indoor environments. Propagation model of waves in tunnels plays an important role designing advanced wireless communication systems. In this paper, we firstly establish narrowband channel for Line-of-sight (LoS) obstructed line-of-sight (OLoS) scenarios, such as path loss model, small-scale fading model. Then, analyze power delay profile (PDP)...
The research on the connectivity characteristics of wireless vehicle network is great significance to realization vehicle-to-vehicle (V2V) communication. However, vehicles road are dynamically changing, and V2V communication greatly affected by transmission distance environment, it's difficult analyze between vehicles. In this paper, firstly, we establish single slope path loss model, probability in urban intersection scenarios. Secondly, relationship threshold. It found that radio...