Results 21 to 30 of about 3,780,505 (270)

New Constructions for Near-Optimal Sets of Frequency-Hopping Sequences via the Gaussian Periods in Finite Fields

IEEE Access, 2022
Frequency-hopping sequences (FHSs) have been widely applied in frequency-hopping code-division multiple-access (FH-CDMA) systems, since they can be used for transmitting messages efficiently along with switching frequencies at set intervals by each ...
Shanding Xu, Jiafu Mi
doaj   +1 more source

Construction of Optimal Sets of Frequency Hopping Sequences [PDF]

ISRN Combinatorics, 2013
Frequency hopping spread spectrum and direct sequence spread spectrum are two main spread coding technologies. Frequency hopping sequences are needed in FH-CDMA systems. In this paper, a construction of optimal sets of frequency hopping sequences is presented.
openaire   +2 more sources

Frequency-Hopping Sequences With Optimal Average Hamming Correlation and Their Applications in Energy and Spectrum Harvesting Technologies Area

IEEE Access, 2021
The research of cyclotomy theory can be traced to Gauss and it has been applied to many fields such as cryptography, coding theory, and combinatorics. According to $v$ prime numbers or compound words, the incision on the residue-like ring ${\mathbb Z ...
Mingyue Fan
doaj   +1 more source

New Bounds on the Partial Hamming Correlation of Wide-Gap Frequency-Hopping Sequence Sets With Low Hit Zone

IEEE Access, 2019
In frequency-hopping systems, there should be a wide frequency-hopping gap between two adjacent frequencies in case the received signals are prone to be interfered by staying at one frequency point for a long time.
Peihua Li, Cuiling Fan, Yang Yang
doaj   +1 more source

Area spectral efficiency of soft-decision space–time–frequency shift-keying-aided slow-frequency-hopping multiple access [PDF]

, 2012
Slow-frequency-hopping multiple access (SFHMA) can provide inherent frequency diversity and beneficially randomize the effects of cochannel interference.
Ngo, Hoang Anh, Hoang Anh Ngo, Hanzo, Lajos, Lajos Hanzo   +3 more
core   +1 more source

Sets of Wide-Gap Frequency-Hopping Sequence With Optimal Maximum Hamming Correlation

IEEE Access, 2022
In application, frequency-hopping (FH) communication system often suffers various interferences, such as single frequency narrow-band interference, partial band blocking interference and tracking interference, and so on.
Changyuan Wang, Xingbing Fu, Wanan Yang, Fuyou Fan, Chaorong Li   +4 more
doaj   +1 more source

Research of Dynamic Wide-gap Frequency Hopping Sequences in Dynamic Spectrum Anti-jamming System [PDF]

Jisuanji gongcheng, 2018
The existing Frequency Hopping(FH) sequence can not be directly applied to a dynamic spectrum anti-interference system due to poor statistical performance and difficulty in real-time changes of communication parameters.Therefore,a FH sequence suitable ...
LI Shengnan,LI Yonggui,NIU Yingtao,YAN Yan,LUO Jianxiang
doaj  

Construction of secure adaptive frequency hopping sequence sets based on AES algorithm

IET Communications
Communication security has become particularly crucial with the rapid development of the Internet of Things (IoT). Frequency hopping spread spectrum (FHSS) technology, a prevalent method in wireless communication, has a wide range of applications in the ...
Dongpo Song, Peng Wei, Yongming Fu, Shilian Wang   +3 more
doaj   +1 more source

Frequency hopped CDMA for third generation mobile radio systems [PDF]

, 1993
Third generation mobile radio systems will provide unified mobile access to a wide range of services for the mass user market. Code division multiple access (CDMA) is one of the most viable access techniques to provide the flexible air interface required.
Purle, DJ, Swales, SC, McGeehan, JP, Beach, MA   +3 more
core   +1 more source

Hyperosmotic stress‐induced redistribution of pre‐mRNA cleavage factor I subunits is associated with shifts in alternative polyadenylation

FEBS Open Bio, EarlyView.
Hyperosmotic stress triggers the relocation of the CFIm complex from the nucleus to the cytoplasm. This shift creates a nuclear ‘stoichiometric bottleneck’, limiting CFIm availability for mRNA processing. Consequently, specific mRNAs like NUDT21 and DICER1 undergo targeted 3′UTR shortening, demonstrating how spatial protein dynamics drive rapid ...
Hitomi Soumiya, Masatake Osawa, Hidefumi Fukumitsu   +2 more
wiley   +1 more source