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Multi-pair two-way relaying systems with physical layer network coding.
- Source :
-
Wireless Networks (10220038) . Jan2018, Vol. 24 Issue 1, p195-208. 14p. - Publication Year :
- 2018
-
Abstract
- Physical layer network coding (PNC) significantly improves the throughput of the two-way relay channel (TWRC). However, most of current work on PNC just focuses on one pair users, and there are limit work on multi-pair PNC, in which the main bottleneck on system performance is the interference caused by the remaining communicating pairs. In this paper, we consider a scenario where multiple pairs communicate with each other through one relay node. For a purpose of comparison, we present the analytical capacities of the multi-pair version of the existing TWRC schemes in closed forms. Considering more practical issues such as the direction distribution of incident signals, we propose a spatial multi-pair physical layer network coding scheme. The novelty includes: in the multiple access phase, the log likelihood ratio combination scheme is proposed, which is robust in bad communication conditions; in the broadcast phase, two adaptive group broadcasting schemes are proposed, which can efficiently overcome the near interference problem. Simulation results validate the superiority of the proposed algorithms. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10220038
- Volume :
- 24
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Wireless Networks (10220038)
- Publication Type :
- Academic Journal
- Accession number :
- 127193001
- Full Text :
- https://doi.org/10.1007/s11276-016-1327-7