Results 81 to 90 of about 1,259,174 (207)

Rate Loss Analysis of Reconfigurable Intelligent Surface-Aided NOMA With Limited Feedback

IEEE Open Journal of the Communications Society
The design of feedback channels in frequency division duplex (FDD) systems is a major challenge because of the limited available feedback bits. We consider non-orthogonal multiple access (NOMA) systems that incorporate reconfigurable intelligent surfaces
Mojtaba Ahmadi Almasi, Hamid Jafarkhani
doaj   +1 more source

Performance of Viterbi Decoding With and Without ARQ on Rician Fading Channels [PDF]

IEEE Transactions on Communications, 2019
Accepted to IEEE Transactions on Communications in Sept ...
openaire   +3 more sources

Moment-Based Approach for Statistical and Simulative Analysis of Turbulent Atmospheric Channels in FSO Communication

IEEE Access, 2019
The free space optical (FSO) or wireless optical communication networks involve atmosphere as the channel, which at times can be turbulent in nature, thus degrading the system performance.
Harmeet Singh, Amandeep Singh Sappal
doaj   +1 more source

Semantic Communication-Based Multiple Description Coding for Robust Image Transmission Over Wireless Channels

IEEE Access
The explosive growth of multimedia traffic over wireless networks demands robust image transmission mechanisms that maintain perceptual quality under channel impairments.
Prabhath Samarathunga, Udara Jayasinghe, Yasith Ganearachchi, Thanuj Fernando, Thushan Sivalingam, Nandana Rajatheva, Anil Fernando   +6 more
doaj   +1 more source

Second-Order Statistical Properties of Vehicle-to-Vehicle Rician Fading Channel

Telecom
Vehicle-to-vehicle (V2V) channels exhibit highly dynamic and non-stationary characteristics, posing significant challenges in designing reliable communication systems. The level crossing rate (LCR) and average fade duration (AFD) are two important second-
Sylvester Akiishi, Ahmed Ali, Ebenezer Esenogho, Modisane Cameron   +3 more
doaj   +1 more source

Performance of Generalized Multicarrier DS-CDMA over Nakagami-$m$ Fading Channels

, 2002
A class of generalized multicarrier direct sequence code-division multiple-access (MC DS-CDMA) schemes is defined and its performance is considered over multipath Nakagamifading channels. The spacing between two adjacent subcarriers of the generalized MC
Yang, L-L., Hanzo, L.
core   +1 more source

Impact of Imperfect Channel State Information on RS Coding Aided Hybrid-ARQ in Rayleigh Fading Channels [PDF]

, 2010
Hybrid Automatic-Repeat-reQuest (ARQ) schemes are capable of maintaining reliable communications for transmission over hostile wireless channels. In coherent detection aided schemes, the achievable performance substantially depends on the accuracy of ...
H. A. Ngo, Ngo, Hoang Anh, L. Hanzo, Hanzo, Lajos   +3 more
core   +1 more source

Performance of Fractionally Spread Multicarrier CDMA in AWGN as Well as Slow and Fast Nakagami-m Fading Channels

, 2005
—In multicarrier code-division multiple-access (MCCDMA), the total system bandwidth is divided into a number of subbands, where each subband may use direct-sequence (DS) spreading and each subband signal is transmitted using a subcarrier frequency.
Yang, L-L., Hanzo, L.
core   +1 more source

Fractionally Spread Multicarrier CDMA: A Multiple-Access Scheme for Various Wireless Channels

, 2003
In multicarrier code-division multiple-access (MCCDMA) the total system bandwidth is divided into a number of subbands, where each subband may use direct-sequence (DS) spreading and each subband signal is transmitted using a subcarrier frequency. In this
Yang, L-L., Hanzo, L.
core   +1 more source

Nonlinear Distortion-Aware Channel Estimation Strategies for IRS-Aided MIMO Systems

IEEE Access
The article addresses the challenges posed by nonlinear distortions in Intelligent Reflecting Surface (IRS)-assisted Multiple-Input Multiple-Output (MIMO) systems, which are often overlooked in conventional channel estimation strategies.
D. L. Sharini, Ravilla Dilli, M. Kanthi, G. D. Goutham Simha   +3 more
doaj   +1 more source