檢索結果 - Qingming Zhu
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An Approach to Wideband and High Accuracy Microwave Photonic Signal Carrier Recovery Based on Carrier Period Measurement
出版 2019-01-01獲取全文We propose and experimentally demonstrate an approach to carrier frequency and phase recovery of a microwave photonic signal based on carrier period measurement (CPM). In the approach, a coarse carrier frequency offset (CFO) estimation is first performed, which is realized by measuring the crossing...
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SQNR Improvement Enabled by Nonuniform DAC Output Levels for IM-DD OFDM Systems
出版 2017-01-01獲取全文We propose and demonstrate via both simulation and experiment a scheme for a low-bit resolution digital-to-analog convertor (DAC) to improve the signal-to-quantification noise ratio (SQNR) of an intensity-modulated direct-detection (IM-DD) orthogonal frequency division multiplexing (OFDM) signal. In...
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Automated Wavelength Alignment in a 4 × 4 Silicon Thermo-Optic Switch Based on Dual-Ring Resonators
出版 2018-01-01獲取全文We propose and experimentally demonstrate an automated resonance wavelength alignment scheme for an <italic>O </italic>-band 4 × 4 thermo-optic optical switch using dual-ring resonators. In this scheme, a new control algorithm based on saddle point search...
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