Results 31 to 40 of about 49,826 (236)

Inter Numerology Interference Reduction Using Windowing Technique For OFDM Based Multi-Numerologies

open access: yesJournal of Applied Science and Engineering, 2022
Cyclic Prefix – Orthogonal Frequency Division Multiplexing is undoubtedly the fundamental waveform for the upcoming wireless standards. Mixed / multi-numerology scheme is one of the promising key features for 5G wireless standard, but it suffers from a ...
P. Kumar, K.R. Usha Rani
doaj   +1 more source

Methods for early recognition of OFDM data [PDF]

open access: yesКомпьютерная оптика, 2020
A technique of early recognition (recovery) of data transmitted using OFDM technology by an incompletely received signal is considered. Theoretically, this approach is able to increase the speed of information transfer, as well as the resistance of the ...
Ruslan Yuzkiv   +3 more
doaj   +1 more source

Performance evaluation of channel estimation techniques for a mobile fourth generation wide area OFDM system [PDF]

open access: yes, 2002
In this paper channel estimation techniques for a mobile fourth generation coherent orthogonal frequency division multiplexing (OFDM) system are proposed. Coherent detection dictates that a per-subband estimate of the frequency response of the channel is
Nix, AR   +5 more
core   +1 more source

Complex improvement of the efficiency of radio electronic devices and information transmission systems with OFDM based on nonlinear systems with dynamic chaos

open access: yesФизика волновых процессов и радиотехнические системы, 2022
This article presents the results of modeling a communication system with OFDM using the methods of scrambling the transmitted signals and masking the transmitted information.
Maxim Yu. Zuev
doaj   +1 more source

Efficient FPGA Implementation of High-Throughput Mixed Radix Multipath Delay Commutator FFT Processor for MIMO-OFDM

open access: yesAdvances in Electrical and Computer Engineering, 2017
This article presents and evaluates pipelined architecture designs for an improved high-frequency Fast Fourier Transform (FFT) processor implemented on Field Programmable Gate Arrays (FPGA) for Multiple Input Multiple Output Orthogonal Frequency ...
DALI, M.   +4 more
doaj   +1 more source

A Low Complexity Optimal LMMSE Channel Estimator for OFDM System

open access: yesJournal of Communications Software and Systems, 2021
Linear minimum mean square error (LMMSE) is the optimal channel estimator in the mean square error (MSE) perspective, however, it requires matrix inversion with cubic complexity.
Jyoti P. Patra   +2 more
doaj   +1 more source

CLEAR Interference Cancellation in a Wideband Dual‐Channel Receiver for Independent Satellite Multi‐Connectivity Links

open access: yesInternational Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT In this paper, the correlation learning estimation and adaptive reduction (CLEAR) of interference, an adaptive, blind and transparent interference compensation method applied in a wideband dual‐channel receiver, is studied for a pair of independent satellite multi‐connectivity links, using the same carrier frequency and signal bandwidth in use
Svilen Dimitrov
wiley   +1 more source

Effects of Cottonseed Cake and Weissella cibaria on Fractionation of Carbohydrates and Proteins and In Situ Degradability in Sorghum Silages

open access: yesNew Zealand Journal of Agricultural Research, Volume 69, Issue 3, June 2026.
This study aimed to estimate the fractionation of carbohydrates and crude protein (CP), and the ruminal degradation rates of dry matter (DM), CP, and neutral detergent fiber (NDF) in sorghum silages. Silages were prepared with or without the addition of 10% cottonseed cake (CSC, natural matter basis) and Weissella cibaria (W. cibaria).
Raiane B. Mendes   +10 more
wiley   +1 more source

A way of decreasing the reliability of new OFDM data link

open access: yesDianzi Jishu Yingyong, 2021
A new OFDM data link model based on OCML is proposed to solve the problem of reliability of data link of air-to-ground radar. The above model uses OCML spatiotemporal chaotic sequence to improve CCSK soft spread spectrum, and simulates with coding and ...
Su Yuhang   +3 more
doaj   +1 more source

Exact BER Analysis of OFDM Systems Communicating over Frequency-Selective Fading Channels Subjected to Carrier Frequency Offset

open access: yes, 2007
Orthogonal Frequency Division Multiplexing (OFDM) has been employed in numerous wireless standards. However, the performance of OFDM systems is degraded by both the Carrier Frequency Offset (CFO) and the Phase Estimation Error (PER).
Liu, X.   +3 more
core   +1 more source

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