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Institutional Repository [SANDBOX]
Technical University of Crete
Technical University of Crete
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| URI | http://purl.tuc.gr/dl/dias/F24B28BF-ED11-4018-87C7-3D2703C30516 | - |
| Identifier | https://ieeexplore.ieee.org/document/7600911/ | - |
| Identifier | https://doi.org/10.1109/ISWCS.2016.7600911 | - |
| Language | en | - |
| Extent | 7 pages | en |
| Title | Polynomial-complexity GLRT-optimal noncoherent PNC | en |
| Creator | Gizeli Maria | en |
| Creator | Γκιζελη Μαρια | el |
| Creator | Karystinos Georgios | en |
| Creator | Καρυστινος Γεωργιος | el |
| Publisher | Institute of Electrical and Electronics Engineers | en |
| Content Summary | Noncoherent two-way relay (TWR) systems with physical-layer network coding (PNC) usually operate with differential or orthogonal modulation. In either case, due to channel-induced memory, the optimal receiver at both the relay and source nodes takes the form of a sequence detector. Such a receiver has exponential (in the sequence length) complexity, when implemented through an exhaustive search among all possible sequences. Hence, many works in the literature consider single-symbol or short-block noncoherent PNC. In this work, we consider transmission of frequency-shift keying (FSK) signals in a TWR system and present an algorithm that performs generalized-likelihood-ratio-test (GLRT) optimal noncoherent PNC with polynomial (in the sequence length) complexity. Although presented in the context of FSK, our developments hold for other orthogonal modulation techniques as well. As a low-cost alternative, we also present a quadratic-complexity suboptimal detector that attains near-optimal performance. Simulation studies indicate that the proposed GLRT-optimal and suboptimal noncoherent PNC attains near-coherent-PNC performance with affordable complexity when the sequence length is on the order of 64, offering a 2-4dB gain over conventional noncoherent PNC approaches that can handle only short values of the sequence length. | en |
| Type of Item | Πλήρης Δημοσίευση σε Συνέδριο | el |
| Type of Item | Conference Full Paper | en |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2018-10-09 | - |
| Date of Publication | 2016 | - |
| Subject | Relays | en |
| Subject | Complexity theory | en |
| Subject | Detectors | en |
| Subject | Frequency shift keying | en |
| Subject | Receivers | en |
| Subject | Differential phase shift keying | en |
| Bibliographic Citation | M. Gkizeli and G. N. Karystinos, "Polynomial-complexity GLRT-optimal noncoherent PNC," in 13th International Symposium on Wireless Communication Systems, 2016, pp. 258-264. doi: 10.1109/ISWCS.2016.7600911 | en |
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