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Detail
Journal Article
Novel Phase and CFO Estimation DSP for Photonics-Based Sub-Thz Communication
- Authors
- Hae Young Rha, Sang-Rok Moon, Joon Ki Lee, Seung-Hyun Cho
- Issue Date
- 2022-05
- Citation
- IEEE/OSA Journal of Lightwave Technology, v.40, no.9, pp.2710-2716
- ISSN
- 0733-8724
- Publisher
- Optical Society of America (OSA)
- Language
- English
- Type
- Journal Article
- Abstract
- Sub-terahertz (THz)-band communication system has drawn much attention as a promising technology to provide future-proof high data rate services. In a photonics-based sub-THz communication system, the generation of THz wave using free running lasers enables us to make a simple, cost effective and frequency tunable implementation. On the other hand, commercially available lasers have relatively broader linewidth and a large carrier frequency offset (CFO). To mitigate the performance degradations due to phase noise and CFO, a carrier recovery digital signal processing (DSP) algorithm is studied for a sub-THz transmission system. We propose a novel phase estimation algorithm to avoid cyclic slips while minimizing phase estimation error to improve BER performance. Our proposed phase recovery DSP algorithm is demonstrated in a 16-quadrature amplitude modulation (QAM) in a 0.3 THz band photonics-based transmission system. Experimental results show that the measured BER are improved from 8.8×10-3 to 3.6×10-3 in a 120 Gb/s 16-QAM transmission using the proposed algorithm. A wide range of CFO estimation is also supported for a sub-THz wireless transmission system using off-the-shelf lasers. Recovery of a CFO between -5 GHz and 5 GHz was also successfully demonstrated.
- KSP Keywords
- 16 quadrature amplitude modulation(16QAM), 5 GHz, BER performance, CFO estimation, Carrier Frequency Offset, DSP algorithm, Digital Signal Processing, High data rate, Off-the-shelf, Phase recovery, Quadrature-amplitude modulation(QAM)
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
