Premium
High‐throughput selective cooperation with complex field network coding in multiuser networks
Author(s) -
Wang Gengrun,
Guo Daoxing,
Liu Aijun,
Zhang Bangning
Publication year - 2014
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22000
Subject(s) - relay , linear network coding , computer science , upper and lower bounds , throughput , channel (broadcasting) , diversity gain , cooperative diversity , coding (social sciences) , computer network , telecommunications , mathematics , statistics , fading , wireless , power (physics) , mathematical analysis , physics , quantum mechanics , network packet
In this paper, a cooperation system suitable for networks with multiple users is proposed. In the first phase of the cooperation, the user who has correctly decoded the source signal and has the best channel condition is selected as the relay. Given that the best relay selected by one source–destination ( s ‐ d ) pair may also be selected by other pairs, complex field network coding (CFNC) is adopted by the relay in the second phase, to provide diversity gains for the s ‐ d pairs simultaneously. The number of channels used is reduced, thus increasing the network throughput. Additionally, this system makes up for the performance loss of the traditional CFNC cooperation in large‐scale networks by achieving more diversity gains. Especially, a closed‐form expression of the average signal error probability (SEP) is derived for small‐scale networks, while an upper‐bound estimation is given for larger networks. It is demonstrated that the system achieves full diversity and is robust. To improve the SEP performance of the system, the receiver is modified, and the results demonstrate desirable average SEP performance. Finally, the analytical results are validated by numerical simulations. © 2014 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.