Optical Data Receiver Feedback Loop for Gain and Noise Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical communication systems fail to effectively control gain and filter out undesired radiation with spectral content overlapping with the communication signal, particularly for signals encoded via frequency presence modulation.
Innovation Solution
An analog signal processing module with a processor, comparator circuit, digital-to-analog converter, and operational amplifier circuit, forming a feedback loop to generate an amplitude-controlled analog signal, which includes a comparator circuit module to receive an analog signal, convert it to digital, and back to analog with amplification or attenuation functions to manage signal amplitude and filter noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If analog-to-digital converter devices are used in existing optical communication systems, then signal conversion is achieved, but effective gain control and filtration of undesired radiation is failed
Solution Approach 1:
The patent implements a feedback loop where the operational amplifier circuit receives feedback from the digital signal processing stage and dynamically adjusts its gain accordingly. The processor determines the optimal gain value based on signal characteristics and feeds this information back to the operational amplifier, enabling automatic gain control that adapts to varying signal conditions while maintaining system reliability.
Solution Approach 2:
The patent divides the signal processing function into separate modular components: an operational amplifier circuit for analog gain control, an analog-to-digital converter for signal conversion, and a processor for digital signal processing. This segmentation allows each component to be optimized independently, with the operational amplifier specifically designed for effective gain control and filtration functions that were previously inadequate in integrated analog-to-digital converter devices.
2Measurement precision
If conventional receivers are used, then basic signal reception is achieved, but dynamic amplitude gain control and noise filtration is failed
Solution Approach 1:
The patent applies preliminary action by performing analog gain control and noise filtration in the operational amplifier circuit before the signal undergoes analog-to-digital conversion. By preprocessing the signal in the analog domain with appropriate gain and filtration, the system improves measurement precision at an early stage, reducing the burden on subsequent digital signal processing stages and enhancing overall signal quality.
Solution Approach 2:
The patent implements dynamic gain control where the operational amplifier's gain is not fixed but can be adjusted in real-time based on signal conditions. The processor continuously monitors signal characteristics and dynamically modifies the gain setting of the operational amplifier, enabling the system to adapt to varying signal amplitudes and noise levels, thereby improving measurement precision across different operating conditions.
3Adaptability or versatility
If static gain control is used, then simple amplification is achieved, but adaptation to varying signal conditions is failed
Solution Approach 1:
The patent employs feedback control where the processor monitors the signal characteristics and automatically adjusts the operational amplifier's gain setting in response to detected signal conditions. This closed-loop feedback mechanism enables the system to adapt to varying signal conditions automatically, with the processor analyzing signal amplitude, noise level, and other parameters to determine the optimal gain value, thereby enhancing adaptability through automated control.
Solution Approach 2:
The patent utilizes parameter changes by dynamically modifying the gain parameter of the operational amplifier based on signal conditions. The processor detects changes in signal characteristics such as amplitude variations or noise levels and相应地 adjusts the gain parameter of the operational amplifier, allowing the system to adapt to different operating conditions by changing key operational parameters in real-time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides dynamic amplitude gain control and effective filtration of noise, enhancing the processing and analysis of optical communication signals by maintaining signal amplitude within a predetermined range, improving signal quality and efficiency in optical communication systems.
Implementation Method 1
a receiving telescope configured to receive an optical communications signal and generate a beam output
Implementation Method 2
a RM grating configured to disperse spectral content of the beam output
Implementation Method 3
a RM first mirror configured to receive the dispersed spectral content of the beam output and collimate the dispersed spectral content of the beam output
Implementation Method 4
a RM second mirror configured to receive the collimated spectral content of the beam output and direct the collimated spectral content of the beam output onto a photodiode array (PDA) to generate a first analog signal
Data Source
AI summary
An analog signal processing module includes a processor and a comparator circuit module having a comparator circuit input and a comparator circuit output, the comparator circuit module being configured to receive a first analog signal at the comparator circuit input and generate a digital output, wherein the comparator circuit output is connected to the processor. A digital-to-analog converter (DAC) module is configured to receive a digital output from the processor and convert the digital output to a second analog signal. An operational amplifier (OpAmp) circuit module has an OpAmp circuit input and an OpAmp circuit output, the OpAmp circuit module being configured to receive the second analog signal at the OpAMp circuit input. A feedback loop is formed by the processor, the DAC module, and the OpAMp circuit module, and is configured to implement an amplification function or attenuation function performed by the OpAmp circuit module.