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Frequency-Domain Oversampling for Cognitive CDMA Systems: Enabling Robust and Massive Multiple Access for Internet of Things

open access: yesIEEE Access, 2016
Toward the era of mobile internet and Internet of Things (IoT), numerous sensors and devices are being introduced and interconnected. To support such amount of data traffic, traditional wireless communication technologies are facing challenges both in ...
Su Hu   +5 more
doaj   +1 more source

Deep Reinforcement Learning for Uplink Scheduling in NOMA-URLLC Networks

open access: yesIEEE Transactions on Machine Learning in Communications and Networking
This article addresses the problem of Ultra Reliable Low Latency Communications (URLLC) in wireless networks, a framework with particularly stringent constraints imposed by many Internet of Things (IoT) applications from diverse sectors.
Benoit-Marie Robaglia   +2 more
doaj   +1 more source

On the Capacity Comparison Between MIMO-NOMA and MIMO-OMA

open access: yesIEEE Access, 2016
Non-orthogonal multiple access (NOMA) has been shown in the literature to have a better performance than OMA in terms of sum channel capacity; however, the capacity superiority of NOMA over OMA has been only proved for single antenna systems, and the ...
Yang Liu   +3 more
doaj   +1 more source

New Variable-Weight Optical Orthogonal Codes with Weights 3 to 5

open access: yesEntropy
In optical networks, designing optical orthogonal codes (OOCs) with appropriate parameters is essential for enhancing the overall system performance. They are divided into two categories, constant-weight OOCs (CW-OOCs) and variable-weight OOCs (VW-OOCs),
Si-Yeon Pak   +3 more
doaj   +1 more source

Modulation and Multiple Access for Beyond 6G Electromagnetic Nanonetworks in the Terahertz Band

open access: yesIEEE Access
The advent of groundbreaking nanomaterials like graphene, renowned for their exceptional electrical properties, has ignited significant interest in nanocommunication.
Pankaj Singh, Sung-Yoon Jung
doaj   +1 more source

Performance and Capacity of PAM and PPM UWB Time-Hopping Multiple Access Communications with Receive Diversity

open access: yesEURASIP Journal on Advances in Signal Processing, 2005
The error probability and capacity of a time-hopping ultra-wideband (UWB) communication system with receive diversity are investigated. We consider pulse amplitude modulation (PAM) and pulse-position modulation (PPM) over additive white Gaussian ...
Zhang Hao, Gulliver T Aaron
doaj   +1 more source

Coding for a multiple-access channel

open access: yesInformation and Control, 1978
The channel considered here is a real-number adder. Attention is restricted to the case of two sources using binary signals; hence the channel has a ternary output. The paper treats both the noiseless and noisy situations. For the noiseless case the following results are obtained: several code-construction techniques are presented; a Gilbert-like lower
openaire   +1 more source

A Fair Communication Scheme for Patrol UAVs Under URLLC Constraints

open access: yesIEEE Access
This paper explores a communication coordination technique for patrol unmanned aerial vehicles (UAVs) operating under ultra-reliable low-latency communication (URLLC) constraints.
Ha Xuan Son   +3 more
doaj   +1 more source

Multiple access based on three-stage modulation in multi-band OFDM-UWB system

open access: yesTongxin xuebao, 2007
According to the characteristics of multi-band orthogonal frequency-division multiplexing ultra-wideband(OFDM-UWB) system,a multiple access based on three-stage modulation(TSM-MA) was proposed.It combined multi-carrier code division multiple access(MC ...
BAO Zhi-hua   +3 more
doaj  

Fluid Antenna Multiple Access for 6G: A Holistic Review

open access: yesIEEE Open Journal of the Communications Society
Future wireless networks must deliver unprecedented spectral efficiency to accommodate massive numbers of interconnected devices; yet today’s multiple-access schemes remain fundamentally constrained by interference.
Hanjiang Hong   +8 more
doaj   +1 more source

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