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Two-stage look-up-table-based 16QAM vector millimeter-wave signal generation and reception.
- Source :
-
Optics letters [Opt Lett] 2024 Feb 15; Vol. 49 (4), pp. 879-882. - Publication Year :
- 2024
-
Abstract
- We propose a two-stage look-up table (LUT) scheme for a photonic 16 quadrature-amplitude-modulation (QAM) millimeter-wave (MMW) communication system. The first-stage LUT is used at the transmitter, which can eliminate complex computational processes and adaptively adjust the precoded amplitude values to achieve optimal performance without being affected by half-wave voltage variations. We have completed a signal transmission below the hard-decision forward error correction (HD-FEC) threshold of 3.8 × 10 <superscript>-3</superscript> at the baud rate of 2/4 GBaud for weak turbulence and 2 GBaud for medium turbulence free-space optics (FSO) channel transmission. The second-stage LUT is used for post-compensation at the receiver as a nonlinear scheme that records the average pattern-related distortion of the channel and mitigates transmission impairment through nonlinear post-compensation. With the help of the second-stage LUT, the sensitivity of the optical receiver is improved by 0.15 dB at a baud rate of 2 GBaud for medium turbulence FSO channel transmission. As the baud rate increases to 4 GBaud, the system's bit error ratio (BER) can reach the soft-decision forward error correction (SD-FEC) threshold of 4.2 × 10 <superscript>-2</superscript> only after applying the second-stage LUT.
Details
- Language :
- English
- ISSN :
- 1539-4794
- Volume :
- 49
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Optics letters
- Publication Type :
- Academic Journal
- Accession number :
- 38359206
- Full Text :
- https://doi.org/10.1364/OL.513987