Results 21 to 30 of about 81,322 (215)

Simulasi Sinkronisasi Carrier pada Modulasi Digital menggunakan Matlab

Jurnal Elkomika, 2014
ABSTRAKDalam sistem komunikasi digital, salah satu manfaat teknik pengkodean adalah sebagai efisiensi bandwidth. Pada kanal komunikasi, adanya noise akan mengganggu dan  menurunkan kinerja sistem komunikasi digital.
DWI ARYANTA, ARSYAD RAMADHAN DARLIS, WIRDA SRI FARHANI   +2 more
doaj   +1 more source

FPGA-Based Implementation of All-Digital QPSK Carrier Recovery Loop Combining Costas Loop and Maximum Likelihood Frequency Estimator

International Journal of Reconfigurable Computing, 2014
This paper presents an efficient all digital carrier recovery loop (ADCRL) for quadrature phase shift keying (QPSK). The ADCRL combines classic closed-loop carrier recovery circuit, all digital Costas loop (ADCOL), with frequency feedward loop, maximum ...
Kaiyu Wang, Zhiming Song, Xianwei Qi, Qingxin Yan, Zhenan Tang   +4 more
doaj   +1 more source

Blind Carrier Phase Recovery Using Extended Kalman Filtering in Probabilistically Shaped Coherent Systems

Photonics, 2022
In this paper, we propose an Extended Kalman Filtering with phase noise reconstruction (EKF-PC) scheme to enhance the carrier recovery capability for probabilistic shaping of coherent optical communication systems with various shaping factors.
Shiqun Zhang, Jiarun Yan, Zhiping Huang
doaj   +1 more source

Efficient Parallel Carrier Recovery for Ultrahigh Speed Coherent QAM Receivers with Application to Optical Channels

Journal of Electrical and Computer Engineering, 2013
This work presents a new efficient parallel carrier recovery architecture suitable for ultrahigh speed intradyne coherent optical receivers (e.g., ≥100 Gb/s) with quadrature amplitude modulation (QAM).
Pablo Gianni, Laura Ferster, Graciela Corral-Briones, Mario R. Hueda   +3 more
doaj   +1 more source

Transport behavior of thorium(IV) in a continuous-flow liquid membrane containing Di-(2-ethylhexyl) phosphonic acid [PDF]

مجله علوم و فنون هسته‌ای, 2020
As a step towards the development of liquid membrane technology for the recovery of thorium from dilute solutions, the article investigates transport behavior of Th(IV)‏ from a feed (solution) phase containing 0.0001M hydrochloric acid (HCl) into a ...
S.A. Milani, F. Zahakifar
doaj   +1 more source

Frequency Offset Compensation and Carrier Phase Recovery for Differentially Encoded 16-QAM Vector Signal in a 60-GHz RoF System

IEEE Photonics Journal, 2013
Differentially encoding and frequency offset compensating for a 16-quadrature amplitude modulation (16-QAM) vector signal in 60-GHz millimeter-wave radio-over-fiber (RoF) systems are experimentally investigated.
A.-L. Yi, L.-S. Yan, C. Liu, M. Zhu, J. Wang, L. Zhang, C.-H. Ye, G.-K. Chang   +7 more
doaj   +1 more source

Sistem Modulator dan Demodulator BPSK dengan Costas Loop

Techne, 2015
Pada tulisan ini akan dibahas suatu sistem transmisi data berbasis BPSK (Binary Phase Shift Keying) menggunakan Costas Loop pada demodulatornya. Pada prinsipnya Costas Loop adalah bentuk khusus dari PLL yang difungsikan untuk melakukan demodulasi sinyal ...
Budihardja Murtianta
doaj   +1 more source

Performance of qpsk system in the presence of pulse interference and noisy carrier reference signal [PDF]

Serbian Journal of Electrical Engineering, 2003
The aim of this paper is the determining the system performance in detecting the QPSK signal. The error probability is determined when the signal, Gaussian noise, pulse interference and imperfect carrier phase recovery are taken into consideration. Phase
Stefanović Mihajlo, Milošević Milan S., Pavlović Dragana   +2 more
doaj   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

The critical role of hot carrier cooling in optically excited structural transitions

npj Computational Materials, 2021
The hot carrier cooling occurs in most photoexcitation-induced phase transitions (PIPTs), but its role has often been neglected in many theoretical simulations as well as in proposed mechanisms.
Wen-Hao Liu, Jun-Wei Luo, Shu-Shen Li, Lin-Wang Wang   +3 more
doaj   +1 more source