Article
Engineering, Electrical & Electronic
Zhiling Yue, Howard H. H. Yang, Meng Zhang, Nikolaos Pappas
Summary: This study proposes a frame slotted ALOHA (FSA)-based protocol for random access networks, where sources transmit status updates to their intended destinations. The protocol's effect on the network's timeliness performance is evaluated using the Age of Information (AoI) metric. Stochastic geometry tools are used to model the spatial positions of source-destination pairs and capture the interference amongst the nodes. Analytical expressions for the average and variance of AoI in different network types are derived. The results show that the FSA-based protocol can significantly decrease the average AoI and stabilize the age performance in densely deployed networks.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2023)
Article
Telecommunications
Mai Kafafy, Ahmed S. Ibrahim, Mahmoud H. Ismail
Summary: This study analyzes the performance of a cellular system sharing spectrum with a nearby rotating radar using stochastic geometry. Results show that allowing eNBs to operate within the radar guard zone improves coverage and service quality compared to a strictly silent guard zone.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Gourab Ghatak, Sanket S. Kalamkar, Yash Gupta
Summary: This article presents a fine-grained performance analysis of automotive radar using stochastic geometry. It includes the reliability analysis of the signal-to-interference-and-noise ratio and evaluation of the mean local delay of radar detection. The article also provides insights into system design and proposes an online algorithm for selecting transmit probability.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Itzik Cohen, Nadav Levanon
Summary: This article explores the possibility of replacing a monostatic radar with a highly directive antenna using a coherent bistatic (BS) radar with a single short baseline between the transmitter and the receiver, without requiring direction measurements. The method is applicable to moving targets and relies on both range and range-rate BS measurements. Theoretical analysis and field-test results demonstrate how consecutive pairs of BS range (r) and range-rate (ṙ) measurements can determine the position, velocity, and heading of a moving target in a two-dimensional scene (x, y, v(x), v(y)). In a three-dimensional scene, a second receiver, not along the baseline, is required to estimate five target parameters (x, y, h, v(x), v(y)). The measurements of range and range-rate distinguish this concept from other multistatic radars and well-known positioning or angle-of-arrival estimation techniques.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2023)
Article
Chemistry, Analytical
Liping Kui, Sai Huang, Zhiyong Feng
Summary: This paper investigates automotive radar interference in both two-lane and multi-lane scenarios using stochastic geometry. Closed-form expressions for mean and variance of interference power are derived, considering directional antenna with constant and Gaussian decaying gains. The study shows that increasing interfering density and ranging distance degrade radar detection performance, while interference levels decrease as blockage intensity increases.
Article
Engineering, Aerospace
Jaehyun Park, Ismail Guvenc
Summary: This article investigates the interference behavior in an aerial radar network for sensing ground targets. Using stochastic geometry analysis, the distribution and Laplace transform of radar interference are derived. By analyzing the successful ranging probability, the optimization of radar network parameters and the spectrum utilization strategy for UAV radar networks with guard zones are discussed.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2023)
Article
Geochemistry & Geophysics
David Small, Christoph Rohner, Nuno Miranda, Marius Ruetschi, Michael E. Schaepman
Summary: This article presents a methodology for producing wide-area backscatter images. By combining backscatter measurements of a single region seen from multiple satellite tracks, the method provides wide-area coverage and corrects for slope effects. The approach is suitable for various applications, such as wet snow monitoring, land cover classification, or short-term change detection.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Engineering, Electrical & Electronic
Orhan Tahir Yavascan, Elif Uysal
Summary: This study comprehensively analyzes threshold-ALOHA, finding that the optimal age threshold and transmission probability are 2.2n and 4.69/n respectively, and the optimal AoI scales with the network size as 1.4169n, almost half the minimum achievable with slotted ALOHA, with throughput loss remaining below 1%. Comparing the performance of this algorithm to that of the SAT policy reveals insights into their efficacy in network communication systems.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Anupam Shome, Amit Kumar Dutta, Saswat Chakrabarti
Summary: This paper presents a throughput assessment of a small area ad-hoc network consisting of IoT energy-harvesting devices, relay nodes, and access points, which can be useful in commercial establishments. The key contribution of this work is the analytical evaluation of the average throughput of an energy-harvesting device.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Geochemistry & Geophysics
Marcel Stefko, Othmar Frey, Charles Werner, Irena Hajnsek
Summary: This article presents the bistatic operation mode and performance analysis of KAPRI, a terrestrial radar interferometer capable of acquiring bistatic full-polarimetric datasets. The article also introduces methods for correcting clock offsets and distortions, as well as a device and method for polarimetric calibration. These techniques enable synchronization, coregistration, and polarimetric calibration of bistatic and monostatic datasets.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Computer Science, Information Systems
Ashutosh Srivastava, Soumyadeep Datta, Sanjay Goyal, Umer Salim, Wasif Jawad Hussain, Pei Liu, Shivendra S. Panwar, Ravikumar Pragada, Pascal Adjakple
Summary: The 3GPP has standardized the 5G New Radio (NR) sidelink (SL) technology for direct device-to-device communications. To meet high data rate requirements, operating SL at mmWave and sub-THz frequencies is essential. However, the current SL design does not consider the directionality of transmissions at high frequencies, resulting in hidden node interference. The proposed paired transmission and sensing scheme improves the packet reception ratio by 27% and enhances performance in highway V2X deployments.
Article
Mechanics
Adrian-Josue Guel-Cortez, Eun-Jin Kim
Summary: In this work, we investigate the relation between 'information rate' and stochastic thermodynamics quantities such as entropy rate and entropy production. We propose the application of entropy rate and entropy production to practical applications including abrupt event detection, correlation analysis, and control engineering. Utilizing the Fokker-Planck equation, we calculate exact values for information rate, entropy rate, and entropy production and derive various inequalities among them. We also create entropic-informed correlation coefficients and information geometric cost functions for abrupt event detection and optimal thermodynamic control policies respectively.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2023)
Article
Engineering, Electrical & Electronic
Raghunandan M. Rao, Harpreet S. Dhillon, Vuk Marojevic, Jeffrey H. Reed
Summary: By studying the coexistence of radar and massive MIMO cellular systems in LoS/near-LoS channels, we analyzed the interference situation and proposed effective model solutions. We analyzed the interference distribution and the probability of false alarm/detection for radar, showing the impact trends of deployment parameters on average interference and providing insights for system design.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2021)
Article
Geochemistry & Geophysics
Minglong Xue, Jian Li, Qingli Luo
Summary: Height estimation from a single synthetic aperture radar (SAR) imagery has great potential but suffers from low accuracy in mountain areas. To address this issue, a geometry-aware consistent constraint (GACC) method is proposed. It uses simulated SAR images and a sparse height map (SH) to improve the performance of single SAR height estimation. Experimental results demonstrate a significant reduction in root-mean-square error (RMSE) compared to traditional methods.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Mustafa A. Kishk, Mohamed-Slim Alouini
Summary: The reconfigurable intelligent surfaces (RIS) technology enhances the coverage probability of cellular networks by providing extra indirect line-of-sight (LoS) links through equipping obstacles with RISs. The deployment of RISs significantly improves the coverage regions of base stations (BSs), but the density of RISs required increases as the density of obstacles increases to ensure that the ratio of blind-spots to the total area is below 10^(-5).
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2021)
