Superchannel Receiver Parameter Sharing Architecture
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current optical data transmission systems face challenges in achieving high data rates while maintaining moderate digital processing effort, as they are limited by the need for individual processing of each channel in optical networks, leading to increased computational demand and energy consumption.
Innovation Solution
A receiver is designed to share processing parameters derived from one digital signal among multiple signals, leveraging the correlation of transmission impairments experienced by closely spaced carriers within a super channel, to reduce processing effort and improve efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual processing is performed for each channel to mitigate transmission impairments, then processing accuracy is improved, but digital processing effort and energy consumption increase
Solution Approach 1:
The patent merges the processing of multiple optical channels by sharing common processing resources. Specifically, a single common filter is applied to multiple channels simultaneously, and processing parameters are shared across channels, thereby reducing the overall digital processing effort while maintaining acceptable processing accuracy for each channel.
Solution Approach 2:
The patent implements universal processing components that serve multiple channels. The common filter and parameter derivation mechanism are designed to be multi-functional, handling impairment mitigation for several channels simultaneously rather than requiring dedicated processing for each channel.
2Productivity
If higher data transmission rates are achieved through higher order modulation formats, then data rate is improved, but sensitivity to optical signal-to-noise ratio deteriorates
Solution Approach 1:
The patent changes the modulation format parameter from higher order formats (which offer higher data rates but lower noise tolerance) to lower order formats like PM-16QAM. This parameter change accepts lower data rates per channel in exchange for improved optical signal-to-noise ratio tolerance, while the overall system capacity is maintained through super channel technology.
3Productivity
If higher baud rate transmission systems are employed to increase data transmission rates, then data rate is improved, but the complexity of digital electronics increases
Solution Approach 1:
The patent segments the high data rate transmission into multiple parallel channels with lower individual baud rates. Instead of using a single high baud rate channel that would require complex high-speed digital electronics, the system divides the total data rate across multiple channels operating at manageable baud rates, thereby reducing the complexity of digital electronics.
4Productivity
If multiple carriers are densely spaced in a fixed bandwidth to form super channels, then information transmission per bandwidth is improved, but the need for individual processing of each carrier increases processing complexity
Solution Approach 1:
The patent merges the processing of multiple densely spaced carriers in a super channel by applying a single common filter to all carriers simultaneously. This approach combines what would otherwise require multiple separate processing chains into one unified processing operation, thereby reducing processing complexity while maintaining the high information transmission capacity of the super channel.
Data Source
AI summary
Disclosed is a receiver for receiving an optical signal comprising a plurality of carriers within a predetermined frequency band. The receiver comprises means for sampling and converting each of the carriers into a set of corresponding digital signals, and a digital processing unit for processing said digital signals of said set of digital signals such as to mitigate transmission impairments of the corresponding optical carriers based on corresponding processing parameters. The digital processing unit is configured for determining such processing parameters by carrying out a corresponding parameter derivation procedure based on one of the digital signals of said set of digital signals. The processing unit is configured for sharing thus determined processing parameters for processing of other digital signals among said set of digital signals based on said shared determined processing parameters, or processing parameters derived from said shared determined processing parameters.