Results 21 to 30 of about 292,760 (265)

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

Fixed‐latency architecture for multi‐stage algebraic interleavers in interleave division multiple access systems

open access: yesElectronics Letters, 2022
In this letter, a fixed‐latency interleaver architecture is proposed for interleave division multiple access (IDMA) systems. The existing multi‐stage algebraic interleaver suffers from the high latency originated from a series of multipliers and adders ...
Byeong Yong Kong
doaj   +1 more source

Multitone-Hopping CDMA Using Feedback-Controlled Hopping Pattern for Decentralized Multiple Access [PDF]

open access: yes, 2008
We propose multitone-hopping code-division multiple access (MH-CDMA) using a feedback-controlled hopping pattern (FCHP) (FCHP/MH-CDMA). In the FCHP/MH-CDMA, part of the filter coefficients of an adaptive finite-duration impulse response (FIR) filter ...
CHIBA, Kazuki, HAMAMURA, Masanori
core   +1 more source

DDMA MIMO radar system for low, slow, and small target detection

open access: yesThe Journal of Engineering, 2019
The low, slow, and small (LSS) target detection has always been a problem for both ground-based and air-borne radar systems. The factors such as weak target reflection energy, ground clutter, and random Doppler component will have a severe impact on ...
Fawei Yang   +3 more
doaj   +1 more source

Investigating the Factors Affecting Political Violence with Emphasis on Ethnic Cleavage in West Azerbaijan Province [PDF]

open access: yesپژوهش‌های راهبردی مسائل اجتماعی ایران, 2021
Introduction: The purpose of the present study is to investigate the factors affecting political violence with emphasis on ethnic cleavage in West Azerbaijan province. Ethnic group relations are often associated with strife and tension in most societies.
Sajjad Moeinfar   +2 more
doaj   +1 more source

TDTS: Three-Dimensional Traffic Scheduling in Optical Fronthaul Networks with Conv-LSTM

open access: yesPhotonics, 2021
Given the more intensive deployments of emerging Internet of Things applications with beyond-fifth-generation communication, the access network becomes bandwidth-hungry to support more kinds of services, requiring higher resource utilization of the ...
Bowen Bao   +5 more
doaj   +1 more source

Progressive pattern orthogonal interleaver set for interleave division multiple access based, non orthogonal multiple access schemes: Beyond 5G perspective

open access: yesJournal of Electrical Engineering, 2022
Abstract This communication suggests an orthogonal interleaver set for interleave division multiple access (IDMA) based non orthogonal multiple access (NOMA) schemes from beyond 5G viewpoint to support enormous increase in user count.
Shivani Dixit   +2 more
openaire   +1 more source

Median Access Control Protocols for Sensor Data Collection: A Review

open access: yesIEEE Access, 2020
Median Access Control (MAC) protocols are designed to mitigate collisions and enhance the energy efficiency for sensor data collection. This paper reviews two basic categories of MAC protocols.
Wenbo Zhao, Yifan Li, Bo Yan, Luping Xu
doaj   +1 more source

A Deep Learning-Based Approach to Power Minimization in Multi-Carrier NOMA With SWIPT

open access: yesIEEE Access, 2019
Simultaneous wireless information and power transfer (SWIPT) and multi-carrier non-orthogonal multiple access (MC-NOMA) are promising technologies for future fifth generation and beyond wireless networks due to their potential capabilities in energy ...
Jingci Luo   +5 more
doaj   +1 more source

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