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The roles of ADC ENOB and AGC clipping effect are investigated in coherent QAM optical transmission system by experiments and simulations, under different transmission effects. Potential implementation risks and optimization for AGC and ADC are presented.
Experimentally measured and theoretically deduced model of ENOB of ADC in digital coherent receivers is demonstrated. ENOB impacts on performance of 112 Gbps polarization multiplexed QPSK systems in linear and nonlinear regimes are investigated.
A new gate controlled bipolar transistor is introduced in this paper which combines the lateral and vertical bipolar effect in standard NMOS device in a 90 nm triple well process technology. A current gain of more than 200, cut off frequency of about 7 GHz, and lower flicker noise compared with CMOS devices were achieved without any change to process and/or introduction of any extra masking step....
We present a state based OSNR estimation, which enables electrical receivers to monitor in-channel optical noise. The estimation is independent from the sampling instant as well as from signal distortions.
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