| 1. |
- Lyu, Zhidong, et al.
(författare)
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Multi-Channel Photonic THz-ISAC System Based on Integrated LFM-QAM Waveform
- 2024
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Ingår i: Journal of Lightwave Technology. - : Institute of Electrical and Electronics Engineers (IEEE). - 0733-8724 .- 1558-2213. ; 42:11, s. 3981-3988
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Tidskriftsartikel (refereegranskat)abstract
- The integrated sensing and communication (ISAC) has been envisioned as a promising technology to simultaneously perform high-capacity communication and high-accuracy sensing with efficient resource utilization. Nevertheless, due to the severe mutual constraints between communication and sensing functions, the performance of previously reported ISAC demonstrations notably trails that of individual communication or sensing systems. In this work, an integrated LFM-QAM waveform is proposed and theoretically analyzed by combining linear frequency modulation (LFM) and quadrature amplitude modulation (QAM) formats. Employing the proposed waveform and optical wavelength division multiplexing (WDM) technique, we experimentally implement a multi-channel photonic terahertz (THz)-ISAC wireless system operating at 275 GHz band, simultaneously achieving a communication data rate up to 120 Gbps and a range resolution as high as 2.5 mm. To the best of our knowledge, this is the first time to demonstrate beyond 100 Gbps wireless data rate and mm-scale resolution based on an integrated waveform in the THz region, revealing the potential of THz-ISAC performance.
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| 2. |
- Al-Awis, S. N., et al.
(författare)
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Phenomenological formula for modelling of physical layer impairments in elastic optical networks
- 2015
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Ingår i: Asia Communications and Photonics Conference, ACPC 2015. - Washington, D.C. : OSA. - 9781943580064
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Konferensbidrag (refereegranskat)abstract
- An empirical modelling technique is introduced to estimate impact of physical layer impairments in elastic optical networks, which can be used to evaluate transmission quality. The model has been verified experimentally with accuracy beyond (97.3%).
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| 3. |
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| 4. |
- Bai, Liga, et al.
(författare)
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Performance Analysis of Multicarrier Modulation Waveforms for Terahertz Wireless Communication
- 2023
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Ingår i: 2023 21st International Conference on Optical Communications and Networks, ICOCN 2023. - : Institute of Electrical and Electronics Engineers (IEEE).
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Konferensbidrag (refereegranskat)abstract
- This paper presents an experimental comparison among the orthogonal frequency division multiplexing (OFDM), filter bank multicarrier (FBMC) and orthogonal time frequency space (OTFS) waveforms in a terahertz photonic-wireless point-to-point communication system operating at 300GHz. Our results show that, all waveforms have similar peak-to-average power ratio (PAPR), the OTFS and OTFS waveforms can achieve comparable bit error rate (BER) performance, while the FBMC waveform outperforms in terms of the out-of-band decay at the cost of non-orthogonality between subcarriers, leading to the deterioration of BER performance at high signal-to-noise ratio (SNR) region.
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| 5. |
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| 6. |
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| 7. |
- Chen, XÍ, et al.
(författare)
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TDHQ Enabling Fine-granularity Adaptive Loading for SSB-DMT Systems
- 2018
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Ingår i: IEEE Photonics Technology Letters. - : Institute of Electrical and Electronics Engineers Inc.. - 1041-1135 .- 1941-0174. ; 30:19, s. 1687-1690
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Tidskriftsartikel (refereegranskat)abstract
- In this letter, we introduce time domain hybrid quadrature amplitude modulation (TDHQ) for the single sideband (SSB) discrete multi-tone (DMT) systems. Experimental results reveal that with a single precoding set and the proposed adaptive loading algorithm, the TDHQ scheme can achieve finer granularity and therefore smoother continuous growth of data rate than that with the conventional quadrature amplitude modulation (QAM). Besides, thanks to the frame construction and the tailored mapping rule, the scheme with TDHQ has an obviously better peak to average power ratio (PAPR).
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| 8. |
- Cristofori, Valentina, et al.
(författare)
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25-Gb/s transmission over 2.5-km SSMF by silicon MRR enhanced 1.55-μm III-V/SOI DML
- 2017
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Ingår i: IEEE Photonics Technology Letters. - : IEEE. - 1041-1135 .- 1941-0174. ; 29:12, s. 960-963
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Tidskriftsartikel (refereegranskat)abstract
- The use of a micro-ring resonator (MRR) to enhance the modulation extinction ratio and dispersion tolerance of a directly modulated laser is experimentally investigated with a bit rate of 25 Gb/s as proposed for the next generation data center communications. The investigated system combines a 11-GHz 1.55-μm directly modulated hybrid III-V/SOI DFB laser realized by bonding III-V materials (InGaAlAs) on a silicon-on-insulator (SOI) wafer and a silicon MRR also fabricated on SOI. Such a transmitter enables error-free transmission (BER < 10-9) at 25 Gb/s data rate over 2.5-km standard single mode fiber without dispersion compensation nor forward error correction. As both laser and MRR are fabricated on the SOI platform, they could be combined into a single device with enhanced performance, thus providing a cost-effective transmitter for short reach applications.
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| 9. |
- Cristofori, Valentina, et al.
(författare)
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25-Gb/s transmission over 2.5-km SSMF by silicon MRR enhanced 1.55-μm III-V/SOI DML
- 2017
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Ingår i: 30th Annual Conference of the IEEE Photonics Society, IPC 2017. - : Institute of Electrical and Electronics Engineers Inc.. - 9781509065783 ; , s. 357-360
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Konferensbidrag (refereegranskat)abstract
- The use of a micro-ring resonator (MRR) to enhance the modulation extinction ratio and dispersion tolerance of a directly modulated laser (DML) is experimentally investigated with a bit rate of 25 Gb/s as proposed for the next generation data center communications. The investigated system combines a 11-GHz 1.55-m directly modulated hybrid III-V/SOI DFB laser realized by bonding III-V materials (InGaAlAs) on a silicon-on-insulator (SOI) wafer and a silicon MRR also fabricated on SOI. Such a transmitter enables error-free transmission (BER< 10 -9 )at 25 Gb/s data rate over 2.5-km SSMF without dispersion compensation nor forward error correction (FEC). As both laser and MRR are fabricated on the SOI platform, they could be combined into a single device with enhanced performance, thus providing a cost-effective transmitter for short reach applications.
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| 10. |
- Da Ros, F., et al.
(författare)
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4-PAM dispersion-uncompensated transmission with micro-ring resonator enhanced 1.55-μm DML
- 2017
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Ingår i: Optics InfoBase Conference Papers. - : Optics Info Base, Optical Society of America. - 9781943580279
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Konferensbidrag (refereegranskat)abstract
- Real-time transmission of 14-GBd 4-PAM signal is demonstrated by combining a commercial 1.55-μm DML with a silicon MRR. BER below the HD-FEC threshold is measured after 26-km SSMF transmission without offline digital signal processing.
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