US Patent No. 10,299,020

METHOD AND APPARATUS FOR SIGNAL PROCESSING BY LIGHT WAVEFORM SHAPING


Patent No. 10,299,020
Issue Date May 21, 2019
Title Method And Apparatus For Signal Processing By Light Waveform Shaping
Inventorship Chia-Chien Wei, Kaohsiung (TW)
Assignee National Sun Yat-Sen University, Kaohsiung (TW)

Claim of US Patent No. 10,299,020

1. A method for signal processing by light waveform shaping, wherein the method is used to process an uplink signal generated by a first digital-to-analog converter (DAC) for uplink transmission to a second digital-to-analog converter (DAC) having a higher sampling rate than the first DAC, and process a downlink signal to be transmitted upon downlink transmission to an a first analog-to-digital converter (ADC) from a second analog-to-digital converter having a higher sampling rate than the first ADC, the method comprisingadjustably shaping a waveform of a light pulse signal component of the uplink signal by an optical modulation in amplitude of a light pulse source for the uplink signal, the light pulse source defining a higher frequency than the shaped waveform of the light pulse signal component, the uplink signal thereby preserving a high-frequency image content of the light pulse source and a lower frequency waveform of the light pulse signal component; and
adjustably shaping a waveform of a light pulse signal component of the downlink signal by optical gating in amplitude of a light pulse source for the downlink signal, the light pulse source defining a higher frequency than the shaped waveform of the light pulse signal component, the downlink signal thereby preserving a high-frequency content of the light pulse source and a lower frequency waveform of the light pulse signal-component.