Optical Receiver Dynamic Signal Processing Circuit Adaptation
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Solution Overview
Problem
In short-distance optical transmission systems, the power consumption of digital signal processing circuits is high due to the large scale of dispersion compensation and adaptive equalization circuits required, while in long-distance systems, these circuits consume even more power and are less efficient for subcarrier multiplexing methods, which are resistant to waveform distortion.
Innovation Solution
An optical receiver design that includes a plurality of common signal processing circuits with the same configuration, allowing switching between single carrier and subcarrier multiplexing methods based on transmission conditions, using a processor to control the operation of these circuits, thereby reducing power consumption and circuit complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If digital coherent reception technology is applied to short-distance transmission, then transmission capacity is improved, but power consumption increases due to large-scale dispersion compensation and adaptive equalization circuits
Solution Approach 1:
The patent implements dynamic adaptation by using a variable dispersion compensation circuit that adjusts its compensation amount based on transmission distance and conditions. The adaptive equalization circuit dynamically optimizes its parameters to match the actual transmission characteristics, avoiding unnecessary computational overhead in short-distance scenarios while maintaining high performance in long-distance transmission.
Solution Approach 2:
The system changes operational parameters based on transmission distance by switching between different dispersion compensation amounts and equalization settings. The processor dynamically adjusts circuit parameters such as compensation strength and equalization coefficients to match the transmission conditions, reducing power consumption in short-distance applications while maintaining transmission capacity.
2Duration of action of stationary object
If dispersion compensation circuit and adaptive equalization circuit are scaled up to compensate for waveform distortion, then transmission distance is extended, but circuit complexity and power consumption increase
Solution Approach 1:
The variable dispersion compensation circuit dynamically adjusts its compensation amount based on the actual transmission distance and waveform distortion conditions. Rather than using a fixed large-scale circuit, the system employs a dynamic adjustment mechanism that scales the compensation level to match the transmission requirements, reducing circuit complexity for short distances while extending transmission distance when needed.
3Reliability
If subcarrier multiplexing method is used, then resistance to waveform distortion is improved, but compatibility with existing digital coherent reception systems decreases
Solution Approach 1:
The patent creates a universal receiver architecture that can handle both subcarrier multiplexing and single carrier transmission methods. The variable dispersion compensation circuit and adaptive equalization circuit are designed to work with multiple modulation formats and transmission methods, allowing the system to benefit from subcarrier multiplexing's waveform distortion tolerance while maintaining compatibility with existing digital coherent reception systems.
Data Source
AI summary
An optical receiver includes, a first converting circuit that converts an optical signal into an electric signal, a plurality of common circuits, each of which has a same circuit configuration and performs a digital signal processing on the electric signal, and a processor that selects and operates one or more common circuits from among the plurality of common circuits according to a transmission method.