Results 121 to 130 of about 165,363 (243)

Principles and Limitations of Ultra-Wideband FM Communications Systems

open access: yesEURASIP Journal on Advances in Signal Processing, 2005
This paper presents a novel UWB communications system using double FM: a low-modulation index digital FSK followed by a high-modulation index analog FM to create a constant-envelope UWB signal.
Kouwenhoven Michiel HL   +4 more
doaj   +1 more source

Results of 1987 MSS helicopter propagation experiment at UHF and L band in Central Maryland [PDF]

open access: yes
This effort emphasizes several important results pertaining to a mobile satellite system propagation experiment performed in Central Maryland during June 1987.
Goldhirsh, Julius, Vogel, Wolfhard J.
core   +1 more source

Slow Frequency-Hopping Multicarrier DS-CDMA for Transmission over Nakagami Multipath Fading Channels

open access: yes, 2001
A novel multiple access scheme based on slow frequency hopping multicarrier direct-sequence code division multiple access (SFH/MC DS-CDMA) is proposed and investigated, which can be rendered compatible with the existing second-generation narrowband CDMA ...
Hanzo, L., Yang, L-L.
core  

GNSS-IR soil moisture estimation using deep learning with Bayesian optimization for hyperparameter tuning

open access: yesJournal of Geodetic Science
One of the ways for measuring water content is using global navigation satellite system (GNSS) multipath signals. By analyzing those signals, we will get useful information about the reflection surface.
Daneghian Patricia, Rastbood Asghar
doaj   +1 more source

Preprint: Using RF-DNA Fingerprints To Classify OFDM Transmitters Under Rayleigh Fading Conditions

open access: yes, 2020
The Internet of Things (IoT) is a collection of Internet connected devices capable of interacting with the physical world and computer systems. It is estimated that the IoT will consist of approximately fifty billion devices by the year 2020. In addition
Fadul, Mohamed   +3 more
core  

Unambiguous Acquisition and Tracking Technique for General BOC Signals [PDF]

open access: yesRadioengineering, 2015
This article presents a new unambiguous acquisition and tracking technique for general Binary Offset Carrier (BOC) ranging signals, which will be used in modern GPS, European Galileo system and Chinese BeiDou system.
F. Shen, G. Xu, J. W. Cheong, H. Feng
doaj  

Radar multipath study for rain-on-radome experiments at the Aircraft Landing Dynamics Facility [PDF]

open access: yes
An analytical study to determine the feasibility of a rain-on-radome experiment at the Aircraft Landing Dynamics Facility (ALDF) at the Langley Research Center is described.
Mackenzie, Anne I., Staton, Leo D.
core   +1 more source

ComputiFi: Latency-Optimized Task Offloading in Multipath Multihop LiFi-WiFi Networks

open access: yesIEEE Open Journal of the Communications Society
The increasing prevalence of latency-critical applications such as Ultra Reliable Low Latency Communications (URLLC), factory automation, and Artificial Intelligence (AI) for image classification demands efficient computational task offloading strategies
Hansini Vijayaraghavan   +2 more
doaj   +1 more source

LMSS modeling status report [PDF]

open access: yes
The need to develop accurate models for secondary statistics of fading land mobile satellite signals has motivated a study of fading signal autocorrelations and multipath spectrum.
Barts, R. Michael, Stutzman, Warren L.
core   +1 more source

Home - About - Disclaimer - Privacy