Results 21 to 30 of about 557,939 (244)

Multiple-Symbol Differential Sphere Detection Aided Successive Relaying in the Cooperative DS-CDMA Uplink [PDF]

open access: yes, 2011
The conventional amplify-and-forward cooperative system is capable of achieving a superior performance with the aid of Multiple-Symbol Differential Sphere Detection (MSDSD), when compared to conventional differential detection (CDD) for transmission over
Hanzo, Lajos, Li, Li
core   +1 more source

Multipoint-to-Multipoint Cooperative Multiuser SIM Free-Space Optical Communication: A Signal-Space Diversity Approach

open access: yesIEEE Access, 2020
In this paper, a novel signal-space diversity (SSD) technique based multipoint-to-multipoint cooperative scheme for a multiuser free-space optical communication system is proposed.
Anshul Jaiswal   +3 more
doaj   +1 more source

Cooperative Transmission Protocols with High Spectral Efficiency and High Diversity Order Using Multiuser Detection and Network Coding

open access: yes, 2007
Cooperative transmission is an emerging communication technique that takes advantages of the broadcast nature of wireless channels. However, due to low spectral efficiency and the requirement of orthogonal channels, its potential for use in future ...
Han, Zhu, Poor, H. Vincent, Zhang, Xin
core   +1 more source

Distributed Space-Time Coding for Full-Duplex Asynchronous Cooperative Communications

open access: yes, 2012
In this paper, we propose two distributed linear convolutional space-time coding (DLC-STC) schemes for full-duplex (FD) asynchronous cooperative communications.
Liu, Yi, Xia, Xiang-Gen, Zhang, Hailin
core   +1 more source

On Security and Reliability using Cooperative Transmissions in Sensor Networks [PDF]

open access: yes, 2010
Recent work on cooperative communications has demonstrated benefits in terms of improving the reliability of links through diversity and/or increasing the reach of a link compared to a single transmitter transmitting to a single receiver (single-input ...
Aksu, Aylin   +3 more
core   +2 more sources

A spatial diversity cooperative spectrum sensing system based on blockchain and deep learning

open access: yesDianxin kexue, 2023
Cooperative spectrum sensing is a key technology in cognitive radio.A data-driven intelligent cooperative spectrum sensing system was proposed with spatial diversity running on a smart contract to address issues of security, privacy, incentive and hidden
Zhongshan XIAO, Chunqi WANG, Daquan FENG
doaj   +2 more sources

Distributed Cooperative Relaying Based on Space-Time Block Code: System Description and Measurement Campaign

open access: yesIEEE Access, 2021
In cooperative relaying, intermediate stations are required to enhance the end-to-end transmission performance. The performance of the cooperative relaying scheme has been investigated theoretically and via computer simulations.
Hidekazu Murata   +2 more
doaj   +1 more source

Mitigating interference and reducing detection complexity in asynchronous cooperative relay network utilising new distributed space time block coding

open access: yesIET Communications, 2021
The synchronisation in wireless cooperative relay networks is impossible to achieve in real environment utilising orthogonal space time block coding. There have been several approaches proposed to mitigate the effect of synchronisation among the relay ...
Abdulghani M. Elazreg, Ahmad H. Kharaz
doaj   +1 more source

Performance Analysis of a Hybrid Downlink-Uplink Cooperative NOMA Scheme

open access: yes, 2017
This paper proposes a novel hybrid downlinkuplink cooperative NOMA (HDU-CNOMA) scheme to achieve a better tradeoff between spectral efficiency and signal reception reliability than the conventional cooperative NOMA schemes.
Dai, Linglong   +3 more
core   +1 more source

Quasi-orthogonal space-frequency coding in non-coherent cooperative broadband networks [PDF]

open access: yes, 2014
© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new ...
Delestre, Fabien   +2 more
core   +2 more sources

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