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Improved signal detection for two-way wireless relaying networks under imperfect time synchronisation
Citation
El Astal, MTO and Olivier, JC, Improved signal detection for two-way wireless relaying networks under imperfect time synchronisation, EURASIP Journal on Advances in Signal Processing, 2014 Article 177. ISSN 1687-6172 (2014) [Refereed Article]
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Copyright Statement
Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/
DOI: doi:10.1186/1687-6180-2014-177
Abstract
Most research on two-way wireless relaying networks (TWRNs) assumes perfect time synchronisation between the
terminals and among the relays. This is, however, difficult to accomplish as the terminals and relays are randomly
located. The lack of synchronisation causes inter-symbol interference which introduces a serious impairment and
negatively impacts the network’s performance. In this article, an enhanced interference cancellation (EIC)-based
detector is proposed to mitigate the experienced performance degradation while maintaining low complexity. It uses
an innovative iterative approach and also benefits of interference components of currently detected symbols using a
modified maximum likelihood (ML) scheme. As a result, it shows significant performance improvement compared to
the conventional detector under different conditions of imperfect synchronisation. In addition, two existing
interference cancellation detectors that are originally proposed for one-way WRNs are extended to TWRNs, even
though the timing error among the terminals is a unique issue for TWRNs and never occurs in one-way networks.
Unlike the existing literature, the proposed detectors apply to networks with an arbitrary number of multiple-antenna
relays. Numerical simulation is provided in terms of bit error rate, to show the improvement in performance when
compared to the conventional detector. Moreover, it is shown that the EIC detector outperforms the extended
detectors and provides 3 to 4 dB gain under moderate condition of imperfect synchronisation.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | two-way wireless relaying networks, imperfect synchronisation, parallel interference cancellation, successive interference cancellation |
| Research Division: | Engineering |
| Research Group: | Communications engineering |
| Research Field: | Signal processing |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding knowledge |
| Objective Field: | Expanding knowledge in engineering |
| UTAS Author: | El Astal, MTO (Mr Mohammed El Astal) |
| UTAS Author: | Olivier, JC (Professor JC Olivier) |
| ID Code: | 100418 |
| Year Published: | 2014 |
| Deposited By: | Research Division |
| Deposited On: | 2015-05-15 |
| Last Modified: | 2018-03-17 |
| Downloads: | 256 View Download Statistics |
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