Results 21 to 30 of about 126,658 (301)
Convolutional coded dual header pulse interval modulation for line of sight photonic wireless links. [PDF]
, 2009 The analysis and simulation for convolutional coded dual header pulse interval modulation (CC-DH-PIM) scheme using a rate ½ convolutional code with the constraint length of 3 is presented.
Al-Ghamdi +8 more
core +1 more source
BER Improvement Using Error Concealment Technique for Pulse Code Modulation System
Diyala Journal of Engineering Sciences, 2018 The output of pulse code modulation (PCM) encoder is statistically described; this description is used at the receiver to reduce the error of the received signal. Recently, PCM is the most important form of pulse modulation.
Ahmed Mohammed Ahmed
doaj +1 more source
Evaluation and Analysis of FBMC/OQAM Systems Based on Pulse Shaping Filters
IEEE Access, 2020 Cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) is the most widespread multicarrier modulation scheme. However, the use of a rectangular filter in CP-OFDM causes poor out-of-band (OoB) radiation.
Heba M. Abdel-Atty +2 more
doaj +1 more source
Journal of Electrical Systems and Information Technology, 2016 This paper presents the design details of a two-level space vector pulse width modulation algorithm in PSCAD that is able to generate pulses for three-phase two-level DC/AC converters with two different switching patterns.
Ahmet Mete Vural
doaj +1 more source
Sensors, 2023 Interrupted sampling repeater jamming (ISRJ) is a classic active coherent jamming. Due to its structural limitations, it has inherent defects such as a discontinuous time–frequency (TF) distribution, strong distribution regularity of pulse compression ...
Jie Xiao, Xizhang Wei, Jia Sun
doaj +1 more source
A Programmable Mode-Locked Fiber Laser Using Phase-Only Pulse Shaping and the Genetic Algorithm
Photonics, 2020 A novel, programmable, mode-locked fiber laser design is presented and numerically demonstrated. The laser programmability is enabled by an intracavity optical phase-only pulse shaper, which utilizes the same linearly chirped fiber Bragg grating (LC-FBG)
Abdullah S. Karar +6 more
doaj +1 more source
Multifunction audio digitizer [PDF]
, 1974 An illustrative embodiment of the invention includes apparatus which simultaneously produces both direct delta modulation and pulse code modulation.
Monford, L. G., Jr.
core +1 more source
An optimal 2 × 2 space-time code for time-hopping ultra-wideband systems with binary pulse position modulation [PDF]
, 2017 The golden code (Belfiore, 2005) is a 2 x 2 space-time (ST) code that achieves the best known performance with all constellations carved from Zopf[i]. On the other hand, impulse radio (IR) time-hopping (TH) ultra wideband (UWB) is a carrier-less baseband
Abou-Rjeily, Chadi +2 more
core +1 more source
Structural biology of ferritin nanocages
FEBS Letters, EarlyView.Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley +1 more source
Frequency shift keying apparatus Patent [PDF]
, 1968 Frequency shift keying apparatus for use with pulse code modulation data transmission ...
Mikszan, D. P.
core +1 more source