Optical Network Device Data Rate Dispersion for EMI Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High port density and high data rates in optical network devices lead to excessive electromagnetic interference (EMI), making it challenging to pass electromagnetic compatibility (EMC)/EMI tests, as existing techniques such as absorbers and re-designing hardware have limited effectiveness.
Innovation Solution
The system generates transmit signals at different data rates across multiple channels, using a coding mechanism and phase locked loop (PLL) configuration to disperse data rates, minimizing detectable electromagnetic interference by treating radiated energy as separate frequency points, thus ensuring compliance with regulatory limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high port density and high data rates are implemented, then data transmission capacity is improved, but electromagnetic interference exceeds acceptable levels
Solution Approach 1:
The patent applies parameter changes by varying the data rate parameter across different channels. Specifically, channels are configured to transmit data at different data rates (e.g., 25.78125 Gbps, 25.78225 Gbps, 25.78325 Gbps) rather than all channels operating at the same data rate. This dispersion of data rates causes the electromagnetic interference to be distributed across different frequency points, reducing the peak interference levels at any single frequency and enabling compliance with EMC/EMI regulations while maintaining high overall data transmission capacity.
2Object-generated harmful factors
If absorbers and hardware re-designing are used to reduce EMI, then electromagnetic interference is reduced, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent substitutes mechanical/hardware-based EMI reduction approaches (such as adding absorbers or re-designing hardware structures) with a signal processing approach. By implementing different data rates across channels through software or firmware control, the system achieves EMI reduction without requiring physical modifications to the hardware architecture. This maintains hardware simplicity while effectively reducing electromagnetic interference through intelligent data rate management.
Data Source
AI summary
A method in which a plurality of transmit signals are generated at data rates that are offset from each other to minimize detectable electromagnetic interference at a particular frequency. The method further includes converting each transmit signal to a corresponding optical transmit signal of a plurality of optical transmit signals for transmission via a corresponding channel of a plurality of channels of an optical network device and transmitting the plurality of optical transmit signals via respective ones of the plurality of channels for transmission on respective optical fibers.