Results 61 to 70 of about 41,621 (188)
A Massive Grant‐Free Random Access Scheme Based on Spectrum Sensing and Preamble Delay
IET Communications, Volume 20, Issue 1, January/December 2026.This paper introduces cognitive radio (CR) and preamble delay (PD) to reduce access collisions, together with non‐orthogonal multiple access (NOMA) to improve spectrum efficiency, and thus proposes an efficient CR‐NOMA‐PD‐based massive grant‐free random multiple access scheme.
Jing Zhang +5 more
wiley +1 more source
On the MIMO Channel Capacity of Multi-Dimensional Signal Sets
, 2006 In this contribution we evaluate the capacity of Multi-Input Multi-Output (MIMO) systems using multi-dimensional PSK/QAM signal sets. It was shown that transmit diversity is capable of narrowing the gap between the capacity of the Rayleigh-fading channel
Hanzo, L., Ng, S. X.
core +2 more sources
An Energy‐Tiered Clustering‐Based Blind Detector for RIS‐RSM Systems
IET Communications, Volume 20, Issue 1, January/December 2026.This paper proposes an energy‐tiered structure initialization (ETSI) algorithm for blind detection in reconfigurable intelligent surface (RIS)‐assisted spatial modulation systems. By decomposing the modulation constellation into multiple energy tiers and leveraging structured prototype initialization with tier‐normalized refinement, ETSI effectively ...
Lijuan Zhang +2 more
wiley +1 more source
Journal of Computing Research and Innovation, 2018 Noise reduction in audio is a process of minimizing the presence of noise in the audio signal. Noise reduction approach helps user understand how to remove noise from the signal.
Zulfikri Paidi, Nurhasyimah Idrus
doaj
IET Communications, Volume 20, Issue 1, January/December 2026.This paper investgates a unmanned aerial vehicle‐assisted non‐orthogonal multiple access‐integrated sensing and communication system, which fuses the UAV's echo signal and target position by employing the extended Kalman filter algorithum to achieve high‐precision prediction of the target trajectory.
Dongsheng Han, Zian Wang, Yan Wang
wiley +1 more source
Simulação de um canal AWGN M-PSK
Revista Principia, 1997 Este trabalho tem por objetivo a simulação de um canal M-PSK em computador para avaliação destas famílias de modulação quando submetidas a ruído aditivo branco Gaussiano - AWGN.
Francisco Marcos de Assis +2 more
doaj +1 more source
The Modified Mean Filter to Remove AWGN [PDF]
The Journal of the Korean Institute of Information and Communication Engineering, 2011 The image signals are corrupted by various noises in signal processing and the noises caused the degradation phenomenon. gaussian noise occurs in the process of transmission. Many studies are being accomplished to restore those signals which corrupted by additive gaussian noise. In this paper, the algorithm is proposed to remove AWGN.
Yinyu Gao, Nam-Ho Kim
openaire +1 more source
IET Communications, Volume 20, Issue 1, January/December 2026.The proposed model includes a dual‐stream deep learning architecture which has a 1D convolutional neural network (CNN)‐based spectral encoder and a graph convolutional network (GCN)‐based spatial encoder for extracting the frequency‐domain and node‐topology features. Experimental analysis of the proposed model is performed using the Real‐World Wireless
P. Ramakrishnan +3 more
wiley +1 more source
Pulse Response Measurement and Processing by Six-Port Reflectometr
Advances in Electrical and Electronic Engineering, 2008 In this paper the pulse response estimation of radio channel by Six-port reflectometer (SPR) is described. The measurement of pulse response is in real time, with baseband conversion and without demodulation.
Norbert Majer +3 more
doaj
Jurnal Nasional Teknik Elektro, 2016 In digital communication systems, their fading and noise in the channel will disrupt or degrade the performance of a digital communication system. Where this disorder, can cause the error detection signal, so as to change bits or symbols at the receiver
Baharuddin Abbas, Ondri Yudha Rusli
doaj +1 more source