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Mach–Zehnder (MZ) modulators are widely used in optical transmitters to generate high-speed optical signals. With electronic dispersion compensation (EDC), the driving signals to MZ modulators change from digital to analog, or continuous waveforms. Consequently, there is signal degradation from their sinusoidal transfer curves. In this paper, we theoretically and numerically investigate the signal...
We propose a polarization demultiplexing method in Stokes space for coherent optical PDM-OFDM without inserting training symbols. The experimental demonstration of fiber transmissions shows good performance, comparable with that of using training symbols.
The channel estimation result of non-pilot subcarriers mainly depends on adjacent pilot subcarriers. A linear interpolation algorithm has been applied to the channel estimation of non-pilot subcarriers. The performance of interpolation algorithm has been simulated in a 10Gb/s direct-detection optical orthgonal frequency division multiplexing(DDO-OFDM) communication system. Constellation convergence...
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