TyrLoc: a low-cost multi-technology MIMO localization system with a single RF chain

Z Gu, T He, J Yin, Y Xu, J Wu - Proceedings of the 19th Annual …, 2021 - dl.acm.org
This work presents the design and implementation of TyrLoc, an accurate multi-technology
switching MIMO localization system that can be deployed on low-cost SDRs. TyrLoc only …

Chip scale atomic clock–driven one-way radiometric tracking for low-earth-orbit CubeSat navigation

MM Rybak, P Axelrad, J Seubert, T Ely - Journal of Spacecraft and …, 2021 - arc.aiaa.org
Chip scale atomic clocks (CSACs) have the potential to provide CubeSat missions with
precision timekeeping capabilities to support onboard radiometric tracking, reducing …

Direction-of-arrival estimation with virtual antenna array: Observability analysis, local oscillator frequency offset compensation, and experimental results

J Cheng, K Guan, F Quitin - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
Estimating the direction-of-arrival (DoA) of radio frequency sources is essential in many
wireless applications. Traditional DoA estimation based on bearing measurements requires …

Decentralized frequency alignment for collaborative beamforming in distributed phased arrays

H Ouassal, M Yan, JA Nanzer - IEEE Transactions on Wireless …, 2021 - ieeexplore.ieee.org
A new approach to distributed synchronization (frequency alignment) for the coordination of
nodes in open loop coherent distributed antenna arrays to enable distributed beamforming …

Autonomous orbit determination and timekeeping in lunar distant retrograde orbits by observing X‐ray pulsars

J Liu, W Wang, H Zhang, L Shu, Y Gao - Navigation, 2021 - Wiley Online Library
A server satellite that is parked in a stable distant retrograde orbit (DRO) in the vicinity of the
Moon can provide navigation service for satellites in the Earth–Moon system. In this study, X …

Optimal localization with sequential pseudorange measurements for moving users in a time-division broadcast positioning system

S Zhao, XP Zhang, X Cui, M Lu - IEEE Internet of Things …, 2021 - ieeexplore.ieee.org
In a time-division broadcast positioning system, a user device (UD) determines its position
by obtaining sequential time of arrival or pseudorange measurements from signals …

Improved clock parameters tracking and ranging method based on two-way timing stamps exchange mechanism

X Gu, J Li, G Zhou, S Xie - IEEE Signal Processing Letters, 2021 - ieeexplore.ieee.org
A common approach for synchronizing the agents in a Wireless Sensor Network (WSN) is
two-way timing stamps exchange mechanism. In this letter, by analyzing the change of …

Autonomous lunar satellite navigation system: Preliminary performance assessment on south pole

M Leonardi, G Sirbu, C Stallo, M Eleuteri… - Proceedings of the 2021 …, 2021 - ion.org
Nowadays, several space agencies are emphasizing the interest for the human return to the
Moon. This renaissance in lunar exploration involves both the public and private sectors and …

Multidimensional likelihood function in the problem of estimating time-frequency parameters of signals

OA Safaryan, IA Pilipenko… - 2021 Radiation and …, 2021 - ieeexplore.ieee.org
The paper deals with the construction and use of a multidimensional likelihood function for
estimating time-frequency parameters. A signal representation model is proposed that takes …

[PDF][PDF] 一种优化的频率驾驭算法研究

赵书红, 董绍武, 白杉杉, 高喆 - 电子与信息学报, 2021 - jeit.ac.cn
为满足各应用领域对高精度时间性能不断提升的需求, 该文设计实现了一种迭代的优化频率驾驭
算法, 主要分为纸面时间计算和实际物理信号实现两个部分. 其中纸面时间计算采用ALGOS …