Abstract
We investigate several existing impairments in an orthogonal frequency-division-multiplexed radio-over-fiber (OFDM-ROF) system delivering a 60 GHz optical millimeter wave with double optical sidebands and a suppressed central carrier. It is found through theoretical analysis and numerical simulation that intersubcarrier interference and frequency-selective fading are the dominant factors degrading the OFDM-ROF system performance. With that in mind, we propose and experimentally demonstrate what we believe to be a novel scheme to mitigate system impairments in an OFDM-ROF link by using the adaptive modulation technique in which different subcarriers may have different modulation formats according to their signal-to-noise ratio over the ROF channel.
Original language | English |
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Pages (from-to) | 758-766 |
Number of pages | 9 |
Journal | Journal of Optical Communications and Networking |
Volume | 3 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1 Sept 2011 |
Keywords
- Frequency-selective fading
- Intersubcarrier interference
- Orthogonal frequency-division multiplexing
- Radio over fiber