Li, Z;
Erkilinc, MS;
Galdino, L;
Shi, K;
Thomsen, BC;
Bayvel, P;
Killey, RI;
(2016)
Comparison of digital signal-signal beat interference compensation techniques in direct-detection subcarrier modulation systems.
Optics Express
, 24
(25)
pp. 29177-29190.
10.1364/OE.24.029176.
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Abstract
Single-polarization direct-detection transceivers may offer advantages compared to digital coherent technology for some metro, back-haul, access and inter-data center applications since they offer low-cost and complexity solutions. However, a direct-detection receiver introduces nonlinearity upon photo detection, since it is a square-law device, which results in signal distortion due to signal-signal beat interference (SSBI). Consequently, it is desirable to develop effective and low-cost SSBI compensation techniques to improve the performance of such transceivers. In this paper, we compare the performance of a number of recently proposed digital signal processing-based SSBI compensation schemes, including the use of single- and two-stage linearization filters, an iterative linearization filter and a SSBI estimation and cancellation technique. Their performance is assessed experimentally using a 7 × 25 Gb/s wavelength division multiplexed (WDM) single-sideband 16-QAM Nyquistsubcarrier modulation system operating at a net information spectral density of 2.3 (b/s)/Hz.
| Type: | Article |
|---|---|
| Title: | Comparison of digital signal-signal beat interference compensation techniques in direct-detection subcarrier modulation systems |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1364/OE.24.029176 |
| Publisher version: | http://doi.org/10.1364/OE.24.029176 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Optics, Cancellation Receiver, Transmission, Band |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1532888 |
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