AI Article Synopsis
- The phase noise (PN) in a 60 GHz OFDM RoF system caused by dispersion leads to phase rotation and intercarrier interference, negatively affecting transmission performance.
- A post PN suppression algorithm is proposed that effectively mitigates these issues without the need for bandwidth-consuming pilot tones.
- When applied to a 25.78-Gbps 16-QAM OFDM RoF signal, the algorithm significantly increases the maximum transmission distance from 75 km to over 115 km, representing a 50% improvement.
Article Abstract
The dispersion-induced phase noise (PN) in an OFDM RoF system at 60 GHz leads to not only subcarrier phase rotation (PRT) but also intercarrier interference (ICI) to severely degrade the transmission performance, when a commercial cost-effective DFB laser with the linewidth of several MHz is adopted. To mitigate both PRT and ICI, a post PN suppression algorithm is proposed, and it does not require any bandwidth-consuming pilot tone. For a 25.78-Gbps 16-QAM OFDM RoF signal using the laser with 1.8-MHz linewidth, employing the algorithm can extend the maximum transmission distance which corresponds to 3-dBm power penalty at the BER of 2 × 10(-3) from 75 km to more than 115 km, i.e. 50% increment of transmission distance.
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| http://dx.doi.org/10.1364/OE.19.010423 | DOI Listing |
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