| 摘要 |
A method, device and system for feedback control of a coherent receiver are provided in the present invention, wherein, the method for feedback control of a coherent receiver includes: feedback control quantity is obtained based on a digital signal converted by an analog/digital converter; according to the said feedback control quantity, a signal amplitude output by a transimpedance amplifier and direct-current quantity of an offset T device are adjusted, until an analog signal input into the analog converter is in the sampling range of the analog/digital converter, wherein said transimpedance amplifier and the offset T device are in series and then connected with said analog/digital converter. The method, device and system for feedback control of a coherent receiver, according to the obtained feedback control quantity, adjust the signal amplitude output by a transimpedance amplifier and the direct-current quantity of an offset T device to adjust the analog signal amplitude before ADC sampling to make it adapt the ADC sampling best, maximize the effective information quantity sampled by ADC and support the subsequent processing of the DSP unit better, therefore, improve the coherent receiving capability. |
