Results 261 to 270 of about 4,863,781 (309)

An interpolated frequency-hopping spread-spectrum transceiver

IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, 1998
A technique of spread-spectrum transmission, interpolated frequency-hopping (IFH), is presented. IFH employs a carrier that moves smoothly and continuously in frequency, helping to alleviate problems, such as spectral splatter and transient mismatch, which are a concern in conventional phase-locked loop (PLL)-based frequency-hopping spread-spectrum ...
N.M. Filiol, C. Plett, T.A.D. Riley, M.A. Copeland   +3 more
openaire   +1 more source

Fast Adaptive Jamming Resource Allocation Against Frequency-Hopping Spread Spectrum in Wireless Sensor Networks via Meta-Deep-Reinforcement-Learning

IEEE Transactions on Aerospace and Electronic Systems
Partial-band noise jamming is an important countermeasure against frequency-hopping spread spectrum technology in wireless sensor networks, and the jamming resource allocation (JRA) problem involved is a high-dimensional combinatorial optimization and ...
Ning Rao, Hua Xu, Zi-Sen Qi, Dan Wang, Yue Zhang   +4 more
semanticscholar   +1 more source

frequency-hopping spread spectrum

2011
openaire   +2 more sources

Efficient Jamming Resource Allocation Against Frequency-Hopping Spread Spectrum in WSNs With Asynchronous Deep Reinforcement Learning

IEEE Sensors Journal
Jamming against frequency-hopping spread spectrum (FHSS) in wireless sensor networks (WSNs) has been primarily investigated with the follower jamming mode.
Ning Rao, Hua Xu, Dan Wang, Zi-Sen Qi, Yue Zhang, Wan-Yi Gu, Xiang Peng   +6 more
semanticscholar   +1 more source

Eavesdropping Avoid Terahertz-Wave Frequency Hopping Spread Spectrum FSK System Driven by Ultra-Fast Wavelength Tunable Laser

International Topical Meeting on Microwave Photonics
To address the increasingly severe eavesdropping risks faced by terahertz-wave wireless communication links, we proposed a photonics-based frequency hopping spread spectrum (FHSS) system.
S. Ye, Naoto Matsutomi, Ryokichi Matsumoto, R. Kaide, Bo Li, M. Che, Y. Mikami, Y. Ueda, K. Kato   +8 more
semanticscholar   +1 more source

Frequency-Hopping Narrowband Interference Suppression in Spread-Spectrum Systems

2013 IEEE 77th Vehicular Technology Conference (VTC Spring), 2013
This paper studies the suppression of frequency- hopping (FH) narrowband interference (NBI) in spread-spectrum (SS) systems. Existing NBI suppression algorithms focus on the case that the center frequency of the NBI is invariant and the performance degrades severely when the NBI is frequency-hopping.
Hui Zhao, Zan Yang, Yuping Zhao
openaire   +1 more source

A GNU Radio Implementation for Frequency Hopping Spread Spectrum Receiver Synchronization

International Conference Radioelektronika, 2019
In this paper a GNU Radio implementation for a signal processing block that allows synchronizing a software defined radio receiver to frequency hopping spread spectrum (FHSS) signals is proposed.
S. Kunze, M. Schiefer, A. Weinberger
semanticscholar   +1 more source

Packet combining in frequency-hop spread-spectrum communication systems

IEEE Transactions on Communications, 1998
The performance of frequency-hop spread-spectrum (FHSS) communication systems using hybrid automatic-repeat-request (ARQ) can be improved by combining current and prior transmissions at the receiver. Two methods for combining packets in systems that employ interleaving and Reed-Solomon (RS) coding are presented and analyzed for the partial-band ...
Abdel-Ghani A. Daraiseh, Carl W. Baum
openaire   +2 more sources

Frequency-hopped spread spectrum optical processor

Annual Meeting Optical Society of America, 1987
A real-time optical processor that can detect spread spectrum signals transmitted by the frequency-hopping method is presented. The system can generate the 2-D correlation distribution between the reference data and the input data at the output plane of the optical processor.
openaire   +1 more source

Frequency-hopped spread spectrum in the presence of a follower partial-band jammer

IEEE Transactions on Communications, 1993
A countermeasure to a partial-band follower jammer is proposed for frequency-hopped spread-spectrum communications. This technique randomizes the transmission technique used by the transmitter (and receiver). Either the information is carried by M tones which are transmitted in a frequency slot, or by M frequency slots which contain signal energy. As a
Amer A. Hassan, Wayne E. Stark, John E. Hershey   +2 more
openaire   +3 more sources