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In this article, we describe advances in digital signal processing (DSP) techniques that enable Tb/s transmission, and software-defined flexible transponders that support adaptive modulation formats and elastic optical networks (EONs).
A simple square or hexagonal 16-QAM generation technique using a commercially available dual drive IQ modulator driven by 4 binary signals is proposed. Square or hexagonal polarization multiplexed (PM) 16-QAM signals at 25Gbaud/s are experimentally demonstrated.
This paper fully describes the use and working principle of resolver, and briefly explans the common used Resolver-to-Digital Converter (RDC for short) decoding arithmetic. Based on this basis, the paper shows a simple software decoding method — the angle tracking observer. It's of low cost, strong anti-interference ability, flexible and convenient compared to the specific RDC chip; and on the other...
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