Results 41 to 50 of about 563,494 (333)

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

Performance of selection relaying and cooperative diversity [PDF]

open access: yesIEEE Transactions on Wireless Communications, 2009
In this paper, a two-hop cooperative multi-relay communication network is considered. Selection relaying schemes are attracting considerable attention due to their prudent bandwidth utilization and ability to provide full diversity. The recent developments in selection relaying (SR) have largely focused on information theoretic analyses such as outage ...
Abdulkareem Adinoyi   +4 more
openaire   +1 more source

Optimal Multi-Antenna Transmission for the Cooperative Non-Orthogonal Multiple-Access System

open access: yesApplied Sciences, 2021
We investigate the beamforming for the multi antenna cooperative non-orthogonal multiple access (NOMA) system, where an access point (AP) delivers messages for multiple user terminals (UT) with successive interference cancellation (SIC) reception method.
Duckdong Hwang   +3 more
doaj   +1 more source

Diversity-Multiplexing Tradeoff of Asynchronous Cooperative Diversity in Wireless Networks

open access: yes, 2007
Synchronization of relay nodes is an important and critical issue in exploiting cooperative diversity in wireless networks. In this paper, two asynchronous cooperative diversity schemes are proposed, namely, distributed delay diversity and asynchronous ...
Wei, Shuangqing
core   +2 more sources

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

Spectrum Sensing Via Reconfigurable Antennas: Is Cooperation of Secondary Users Indispensable?

open access: yes, 2014
This work presents an analytical framework for characterizing the performance of cooperative and noncooperative spectrum sensing schemes by figuring out the tradeoff between the achieved diversity and coding gains in each scheme.
Alaa, Ahmed M.   +2 more
core   +1 more source

Belief diversity and cooperation

open access: yesJournal of Economic Behavior & Organization
Author's accepted manuscript (postprint).
Georgy Lukyanov, David Li
openaire   +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

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

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

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