Results 21 to 30 of about 229,527 (307)

Non‐orthogonal multiple access without channel state information for similar channel conditions

open access: yesElectronics Letters, 2019
A downlink non‐orthogonal multiple access with QPSK input constellations based on virtual channel optimisation is presented to address the similar channel conditions scenario.
Wenlong Xia   +3 more
doaj   +1 more source

Analysis of factors affecting the operation of the communication system with nonorthogonal multiple access [PDF]

open access: yesITM Web of Conferences, 2019
NOMA is a group of non-orthogonal multiple access methods [1]. In this article, we talk about the Power Domain (Division) NOMA method. It is a non-orthogonal multiple access method with channel separation by power [2].
Rogozhnikov Eugeniy   +4 more
doaj   +1 more source

Asynchronous multiple-access channel capacity [PDF]

open access: yesIEEE Transactions on Information Theory, 1981
The capacity region for the discrete memoryless multiple-access channel without time synchronization at the transmitters and receivers is shown to be the same as the known capacity region for the ordinary multiple-access channel. The proof utilizes time sharing of two optimal codes for the ordinary multiple-access channel and uses maximum likelihood ...
Cover, Thomas M.   +2 more
openaire   +1 more source

Polar Coding for the Multiple Access Channel With Confidential Messages

open access: yesIEEE Access, 2020
The multiple access channel with confidential messages (MAC-CM) generalizes the traditional multiple access channel by allowing both users to receive channel outputs.
Haowei Wang   +3 more
doaj   +1 more source

Performance of Downlink NOMA for a Massive IoT Network Over a Nakagami-m Fading Channel With Optimized Power Allocation

open access: yesIEEE Access, 2023
Non-orthogonal multiple access (NOMA) is a multiple access technology that can provide efficient spectrum utilization and increased channel capacity on Internet of Things (IoT) networks.
Rummi Sirait   +2 more
doaj   +1 more source

The Poisson multiple-access channel [PDF]

open access: yesIEEE Transactions on Information Theory, 1998
The Poisson multiple-access channel (MAC) models many-to-one optical communication through an optical fiber or in free space. For this model we compute the capacity region for the two-user case as a function of the allowed peak power. Focusing on the maximum throughput we generalize our results to the case where the users are subjected to an additional
A. Lapidoth, S. Shamai
openaire   +1 more source

Channel Allocation for Connected Vehicles in Internet of Things Services

open access: yesSensors, 2021
Based on the existing Internet of Vehicles communication protocol and multi-channel allocation strategy, this paper studies the key issues with vehicle communication.
Ahmed Abdulhakim Al-Absi   +3 more
doaj   +1 more source

ZF-SIC Based Individual Secrecy in SIMO Multiple Access Wiretap Channel

open access: yesIEEE Access, 2017
In this paper, a decoding method of joint zero-forcing and successive interference cancellation (ZF-SIC) is put forward to assist the study of the individual secrecy in the quasi-static Rayleigh fading single-input multiple-output multiple access wiretap
Kaiwei Jiang   +4 more
doaj   +1 more source

Optimizing Information Freshness in a Multiple Access Channel With Heterogeneous Devices

open access: yesIEEE Open Journal of the Communications Society, 2021
In this work, we study age-optimal scheduling with stability constraints in a multiple access channel with two heterogeneous source nodes transmitting to a common destination.
Zheng Chen   +3 more
doaj   +1 more source

Novel half-duplex relay strategy and its resource allocation

open access: yesTongxin xuebao, 2009
Conventional time-division half-duplex relay strategies based on amplify-and-forward or decode-and-forward strategy could relieve relay nodes from full-duplex requirement but lead to degraded spectrum efficiency.
LI Yong   +3 more
doaj   +2 more sources

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