Projects per year
Abstract
In this paper, we propose a novel linear physical-layer network coding scheme over hybrid finite ring (HFR-LPNC) for Rayleigh fading two-way relay channels. The relay maps the superimposed signal of the two users to a linear network coded combination (LNCC) in hybrid finite ring, rather than using the simple bit-wise eXclusive-OR mapping. The optimal linear coefficients are selected to generate the LNCC, aiming to: 1) maximize the sum-rate in the MAC phase; and 2) ensure unambiguous decoding. To avoid the performance degradation caused by high-order irregular mappings, properly designed source coding is used for compressing the LNCC alphabet over the hybrid finite ring into the unifying 4-ary alphabet. We derive the constellation constrained sum-rates for HFR-LPNC in comparison with 5QAM denoise-and-forward (5QAM-DNF), which we use as a reference scheme. Furthermore, we explicitly characterize the rate difference between HFR-LPNC and 5QAM-DNF. Our analysis and simulation show that: 1) HFR-LPNC has a superior ability to mitigate the singular fading compared with 5QAM-DNF; and 2) HFR-LPNC is superior to 5QAM-DNF over a wide range of SNRs.
Original language | English |
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Article number | 6860266 |
Pages (from-to) | 3249-3261 |
Number of pages | 13 |
Journal | IEEE Transactions on Communications |
Volume | 62 |
Issue number | 9 |
Early online date | 18 Jul 2014 |
DOIs | |
Publication status | Published - 1 Sept 2014 |
Keywords
- constellation constrained capacity
- finite ring
- Physical-layer network coding
- two-way relay channels
Projects
- 1 Finished
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Network coded modulation for next generation wireless access networks
18/11/13 → 31/07/17
Project: Research project (funded) › Research