Results 21 to 30 of about 1,502 (175)

Fuzzy hypersoft sets and its weightage operator for decision making [PDF]

open access: yesJournal of Fuzzy Extension and Applications, 2021
Hypersoft set is an extension of the soft set where there is more than one set of attributes occur and it is very much helpful in multi-criteria group decision making problem. In a hypersoft set, the function F is a multi-argument function. In this paper,
Somen Debnath
doaj   +1 more source

Strong no‐hit‐zone frequency sequence set with wide gap

open access: yesElectronics Letters, 2022
For the communication systems, no‐hit‐zone (NHZ) frequency hopping sequences have good anti‐interference performance. However, the system's time delay may be out of the NHZ.
Qin Shu, Haiyun Liu, Yapei Zhu, Xing Liu
doaj   +1 more source

Automatic Recognition of Fundamental Heart Sound Segments From PCG Corrupted With Lung Sounds and Speech

open access: yesIEEE Access, 2020
Automated recognition of fundamental heart sound segments (FHSS) from Phonocardiogram (PCG) is the preliminary step before clinical parameters extraction to detect the presence of abnormality if any.
K. Ajay Babu, Barathram Ramkumar
doaj   +1 more source

Effect of Al content on the high-temperature oxidation behavior of 18Cr–Al–Si ferritic heat-resistant stainless steel

open access: yesJournal of Materials Research and Technology, 2021
The effect of Al content on the high-temperature oxidation (800 and 900 °C) of 18Cr–Al–Si FHSS (ferritic heat-resistant stainless steel) for up to 180 h in air was investigated via the isothermal oxidation method.
Yingbo Zhang   +5 more
doaj   +1 more source

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

open access: yesIEEE 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

Security Improvement by using Dual Coded FHSS (DC-FHSS)

open access: yesInternational Journal of Computer Applications, 2013
In this paper a technique is offered for improving the security of data transmission. In today’s technical world the prime objective of wireless communication is to make the transmission not only clear, noise free and time efficient but also to make it well secure from unauthorized interceptors. Frequency hopping is a technique used for this purpose in
Shahid Latif, Amjad ali, Rahat Ullah
openaire   +1 more source

Estudio de los Sistemas de Espectro Esparcido por Salto de Frecuencia en FPGA

open access: yesInformática y Sistemas, 2018
Los sistemas de espectro esparcido por salto de frecuencia (FHSS) son implementados en la actualidad para brindar mayor robustez y seguridad en las comunicaciones.
Alejandro Arteaga   +2 more
doaj   +1 more source

Study of the tracking of FHSS signal over AWGN channel

open access: yes, 2020
Frequency Hopping Spread Spectrum (FHSS) communications utilizes a pseudo random code to spread the bandwidth of the data being transmitted over a much wider range than is required by the data. Due to the pseudo random nature of the carriers selected for
Muhanned AL-Rawi, AL-Rawi, Muhanned
core   +1 more source

Analysis of Coded FHSS Systems with Multiple Access Interference over Generalized Fading Channels

open access: yesEURASIP Journal on Wireless Communications and Networking, 2009
We study the effect of interference on the performance of coded FHSS systems. This is achieved by modeling the physical channel in these systems as a block fading channel.
Salam A. Zummo
doaj   +1 more source

Performance evaluation and mathematical analysis of direct sequence and frequency hopping spread spectrum systems under wideband interference

open access: yesIJAIN (International Journal of Advances in Intelligent Informatics), 2018
This paper presents performance evaluation and comparison analysis of Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS) systems.
Fawzan Ghalib Abdul Karim Bawahab   +4 more
doaj   +1 more source

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