Results 1 to 10 of about 107 (87)

Performance Analysis of Cooperative Pattern Division Multiple Access (Co-PDMA) in Uplink Network

open access: yesIEEE Access, 2017
As a promising candidate non-orthogonal multiple access scheme for the fifth generation (5G) wireless communication system, pattern division multiple access (PDMA) has received considerable attention recently.
Wanwei Tang, Shaoli Kang, Bin Ren
doaj   +4 more sources

Blind Device Detection via Extended Sparsity Estimation-OMP in Grant-Free NOMA-IoT [PDF]

open access: yesSensors
Grant-free non-orthogonal multiple access (NOMA) enables communication without a scheduling process. Base station (BS) must detect active users without knowing their number, a challenge that also occurs in grant-free NOMA–Internet of Things (IoT). Device
Nur Andini   +3 more
doaj   +2 more sources

Pattern Division Multiple Access Featuring Amplify-and-Forward Relaying in an Uplink Network

open access: yesIEEE Access, 2020
NOMA is one of key enabling technologies for prosumer energy management. We studied co-operative techniques useful for establishing pattern division multiple access (PDMA) in an uplink network. In particular, we examined amplify-and-forward (AF) relaying
Xiurong Zhang, Shaoli Kang, Xueqian Fu
doaj   +3 more sources

Analysis and Evaluation of Pattern Division Multiple Access Scheme Jointed with 5G Waveforms

open access: yesIEEE Access, 2019
Nonorthogonal multiple access (NOMA) techniques represent a key feature for 5G systems in order to increase multiple users' systems' capacity. In particular, we propose, for study, a pattern division multiple access (PDMA) technique, which defines a ...
Meriem Mhedhbi, Fouzia Elbahhar Boukour
doaj   +3 more sources

Color Image Transmission in SPC Channel Encoded Multiuser 5G Compatible Pattern Division Multiple Access (PDMA) Wireless Communication System [PDF]

open access: yesAdvances in Wireless Communications and Networks, 2018
Pattern Division Multiple Access (PDMA) is a novel non-orthogonal multiple access scheme proposed to meet up the diverse demands on high capacity and large number of connections in the fifth generation (5G) wireless networks. PDMA uses the characteristic pattern to define the sparse mapping from data to a group of resources, and the sparsity of the ...
openaire   +3 more sources

Downlink Power Allocation Optimization in Pattern Division Multiple Access

open access: yesIEEE Access, 2021
Non-orthogonal multiple access (NOMA), in particular pattern division multiple access (PDMA), has been recently considered as the critical multiple access technologies deployed for 5G applications.
Jie Zeng   +5 more
doaj   +1 more source

New multiple access and waveform technology for 6G

open access: yesDianxin kexue, 2022
With the explosive growth of Internet devices, the 5G new radio (NR) system faces congestion and high latency issues due to the low access efficiency of traditional orthogonal multiple access (OMA).Besides this, the performance of the orthogonal ...
Hua LI   +4 more
doaj   +2 more sources

Research on PDMA communication system based on complete complementary sequence

open access: yesEURASIP Journal on Wireless Communications and Networking, 2020
Pattern division multiple access (PDMA) is a new non-orthogonal multiple access (NOMA) technology. It is proposed to meet the challenge of 5G large-scale connectivity and high-frequency spectral efficiency.
Shufeng Li, Baoxin Su, Libiao Jin
doaj   +1 more source

Construction of nested pattern matrix with large girth for PDMA systems

open access: yesElectronics Letters, 2021
In this letter, a new method is proposed to construct the pattern matrix (PM) with both nested structure and large girth for pattern division multiple access (PDMA) system. The proposed method contains two steps.
Qingqing Liu, Jin Xu
doaj   +1 more source

On the Performance of PDMA With Decode-and-Forward Relaying in Downlink Network

open access: yesIEEE Access, 2018
This paper studies the application of cooperative techniques for pattern division multiple access (PDMA) in downlink (DL) network. More particularly, the performance of joint decode-and-forward (DF) relaying and PDMA (DF-PDMA) is investigated over ...
Wanwei Tang   +4 more
doaj   +1 more source

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