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We firstly demonstrate a low-bit DAC with a nonuniform quantification scheme in intensity modulated direct detection with filter bank based multicarrier (IMDD-FBMC) system for improving the signal-to-quantification noise ratio (SQNR). In this scheme, owing to the Gaussian-like distribution of FBMC signals, the low-level waveform occupies much more bits to mitigate the quantization noise hence improving...
By combining CAZAC processing with nonlinearity compensation, span of performance-reliable optical modulation depth (OMD) in analog RoF is significantly enlarged and OSNR is further enlarged. This scheme reduces the requirement of related photoelectrical devices.
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