Results 21 to 30 of about 797 (174)

Blind Estimation of Direct Sequence Spread Spectrum Signal Based on MCMC-UKF [PDF]

open access: yesJisuanji gongcheng, 2019
Aiming at the problem of spreading code and information sequence blind estimation for long code Direct Sequence Spread Spectrum(DSSS) signal,this paper proposes a joint estimation algorithm based on overlapping segment Markov Chain Monte Carlo-Unscented ...
MA Chao, ZHANG Limin
doaj   +1 more source

A Robust Timing and Phase Offset Estimation Technique for CPM-DSSS-Based Secured Communication Link

open access: yesIEEE Access, 2021
Continuous Phase Modulation–Direct Sequence Spread Spectrum (CPM-DSSS) is a promising scheme for a secured Point-to-Point (P2P) communication system having Anti-Jamming (AJ) capabilities.
Saima Shehzadi   +4 more
doaj   +1 more source

Performance analysis of DSSS- and CSS-based physical layer for IoT transmission over LEO satellites

open access: yesETRI Journal, 2022
To determine a suitable waveform for Internet of Things (IoT) transmission over low-Earth orbit (LEO) satellites, this paper reports the results of a performance comparison between chirp spread spectrum (CSS)-based LoRa and direct sequence spread ...
Sooyeob Jung   +5 more
doaj   +1 more source

Code Synchronization Algorithm Based on Segment Correlation in Spread Spectrum Communication

open access: yesAlgorithms, 2015
Spread Spectrum (SPSP) Communication is the theoretical basis of Direct Sequence Spread Spectrum (DSSS) transceiver technology. Spreading code, modulation, demodulation, carrier synchronization and code synchronization in SPSP communications are the core
Aohan Li   +4 more
doaj   +1 more source

SIMULASI KINERJA GOLD CODE PADA SISTEM KOMUNIKASI DIRECT SEQUENCE SPREAD SPECTRUM (DSSS) MELALUI KANAL MULTIPATH FADING

open access: yesJurnal SPEKTRUM, 2021
The communication channel cannot be separated from noise, interference and fading.To minimize mutual interference, you can use a scatter code. This research uses Gold Codewith a code length of 31. This simulation aims to determine the effect of the number of multipathcomponents on the Gold Code performance of multipath fading channels.
Pande Ketut Sudiarta   +2 more
openaire   +1 more source

Spread Spectrum Modem for Voice and Data Transmission

open access: yesJournal of Advances in Information Technology, 2012
This paper describes the design of a direct sequence spread spectrum (DSSS) modem for voice and data transmission using SYSTEMVIEW and MATLAB. The advantage of DSSS voice and data transmission includes the immunity from interference signals and anti ...
Md. Abdul Alim
doaj   +1 more source

DETECTION OF THE DSSS SIGNAL WITH VARIABLE PN CODES USING THE ANN

open access: yesIraqi Journal of Information & Communication Technology, 2021
- Direct sequence spread spectrum systems appeared and are used to protect the transmitted data DSSS Systems might be one of the solutions for reliable and secured communications.
Aya Y. Khudhair   +1 more
doaj   +1 more source

Code index modulation method with multidimensional invisible data mapping

open access: yesIET Signal Processing, 2022
With the continuous improvement of the application requirements of Direct Sequence Spread Spectrum (DSSS), especially the high requirements of data transmission rate, the advantages of traditional DSSS system are limited, so the index modulation DSSS ...
Fang Liu   +3 more
doaj   +1 more source

Interference management using direct sequence spread spectrum (DSSS) technique in LTE-Wi-Fi network

open access: yesJournal of Fundamental and Applied Sciences, 2018
In this paper, an enhance DSSS technique was proposed which considers both serving and its neighbouring base stations in the network. New coefficients, chip rate coefficient (a) and radius fraction coefficient (b) were applied in DSSS technique in order to improve the SINR value. First, SINR MUE and SINR WUE for the standard DSSS were simulated.
Azhar, A. E.   +3 more
openaire   +2 more sources

Performance analysis of DSSS system with periodic sequence against CW interference1

open access: yesTongxin xuebao, 2007
Based on the brief account of the performance analysis result of direct sequence spread spectrum(DSSS) system against single tone continuous wave(CW) interference obtained from the traditional stand Gaussian approximation(SGA) hypothesis,the mathematical
WEI An-quan1, SHEN Lian-feng 1
doaj   +2 more sources

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