Results 31 to 40 of about 7,220 (258)

Low-Complexity CRC Aided Joint Iterative Detection and SCL Decoding Receiver of Polar Coded SCMA System

open access: yesIEEE Access, 2020
As the fifth-generation (5G) wireless networks' key technology, the joint design of SCMA and polar code is concerned by the future communication system. In this paper, a CRC aided joint iterative detection and successive cancellation list (SCL) decoding (
Xi Wu, Yafeng Wang, Chuanfeng Li
doaj   +1 more source

Grant-Free Sparse Code Multiple Access for Uplink Massive Machine-Type Communications and Its Real-Time Receiver Design

open access: yesIEEE Open Journal of Circuits and Systems, 2023
Massive Machine-type Communications (mMTCs) is a major use case for the 5G standard. The grant-free (GF) sparse-coded multiple access (SCMA) transmission is particularly spectrum efficient in the sporadic uplink traffic, which is characteristic of the ...
Ti-Yu Chen, Zhi-Jing Lin, Tzi-Dar Chiueh
doaj   +1 more source

A Multistage Method for SCMA Codebook Design Based on MDS Codes [PDF]

open access: yes, 2019
Sparse Code Multiple Access (SCMA) has been recently proposed for the future generation of wireless communication standards. SCMA system design involves specifying several parameters.
da Silva, Bruno Fontana   +3 more
core   +5 more sources

Design of SCMA Codebooks using Differential Evolution [PDF]

open access: yes2020 IEEE International Conference on Communications Workshops (ICC Workshops), 2020
Accepted for presentation in IEEE ICC'20 Workshop ...
Deka, Kuntal   +3 more
openaire   +2 more sources

Asynchronous Flipped Grant-Free SCMA for Satellite-Based Internet of Things Communication Networks

open access: yesApplied Sciences, 2019
Sparse code multiple access (SCMA) is a promising code domain non-orthogonal multiple-access scheme which is able to support massive connectivity and grant-free transmission in future satellite-based Internet of Things (IoT) communication networks ...
Pengxu Li, Gaofeng Cui, Weidong Wang
doaj   +1 more source

Finite key size analysis of two-way quantum cryptography [PDF]

open access: yes, 2015
Quantum cryptographic protocols solve the longstanding problem of distributing a shared secret string to two distant users by typically making use of one-way quantum channel.
Mancini, Stefano, Shaari, Jesni Shamsul
core   +3 more sources

Resource Allocation-Based PAPR Analysis in Uplink SCMA-OFDM Systems

open access: yesIEEE Access, 2019
Sparse code multiple access (SCMA) is a non-orthogonal multiple access (NOMA) uplink solution that overloads resource elements (RE's) with more than one user.
Aditya S. Rajasekaran   +4 more
doaj   +1 more source

Interleaving based SCMA Codebook Design Using Arnold’s Cat Chaotic Map

open access: yesIraqi Journal of Information & Communication Technology, 2023
Non-orthogonal multiple access (NOMA) technology is a significant topic of the present 5G investigation. A possible NOMA approach is Sparse Code Multiple Access (SCMA), increasing next-generation communication's ability to handle multiple users. In SCMA,
Sura S. Mohamed, Hikmat N. Abdullah
doaj   +1 more source

MIMO Hybrid PD-SCMA NOMA Uplink Transceiver System

open access: yesIEEE Access, 2022
The application of multiple-input multiple-output (MIMO) on power domain sparse code multiple access (PD-SCMA) systems would enhance their performance by increasing the multiplexing and diversity gains.
Simon Chege, Tom Walingo
doaj   +1 more source

Associations between purine metabolites and clinical symptoms in schizophrenia [PDF]

open access: yes, 2012
Background: The antioxidant defense system, which is known to be dysregulated in schizophrenia, is closely linked to the dynamics of purine pathway. Thus, alterations in the homeostatic balance in the purine pathway may be involved in the pathophysiology
Debra M. Montrose   +9 more
core   +3 more sources

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