Investigation on iterative multiuser detection physical layer network coding in two-way relay free-space optical links with turbulences and pointing errors

Zina Abualmaalie, Zabih Ghassemlooy, Manav Bhatnagar, Hoa Le Minh, Nauman Aslam, Shien-Kuei Liaw, It Ee Lee

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
6 Downloads (Pure)

Abstract

Physical layer network coding (PNC) improves the throughput in wireless networks by enabling two nodes to exchange information using a minimum number of time slots. The PNC technique is proposed for two-way relay channel free space optical (TWR-FSO) communications with the aim of maximizing the utilization of network resources. The multipair TWR-FSO is considered in this paper, where a single antenna on each pair seeks to communicate via a common receiver aperture at the relay. Therefore, chip interleaving is adopted as a technique to separate the different transmitted signals at the relay node to perform PNC mapping. Accordingly, this scheme relies on the iterative multiuser technique for detection of users at the receiver. The bit error rate (BER) performance of the proposed system is examined under the combined influences of atmospheric loss, turbulence-induced channel fading, and pointing errors (PEs). By adopting the joint PNC mapping with interleaving and multiuser detection techniques, the BER results show that the proposed scheme can achieve a significant performance improvement against the degrading effects of turbulences and PEs. It is also demonstrated that a larger number of simultaneous users can be supported with this new scheme in establishing a communication link between multiple pairs of nodes in two time slots, thereby improving the channel capacity.
Original languageEnglish
Pages (from-to)9396
JournalApplied Optics
Volume55
Issue number33
Early online date14 Oct 2016
DOIs
Publication statusPublished - 1 Nov 2016

Fingerprint

Dive into the research topics of 'Investigation on iterative multiuser detection physical layer network coding in two-way relay free-space optical links with turbulences and pointing errors'. Together they form a unique fingerprint.

Cite this