Coherent Optical DSP Coefficient Updates for Lower Chip Power
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Solution Overview
Problem
The power consumption of equalization, carrier recovery, and IQ imbalance algorithm circuits in coherent optical chips is significant and needs to be reduced to lower heat dissipation and operating costs, particularly in high-capacity communication scenarios.
Innovation Solution
A dynamic power consumption management system that includes an equalization algorithm circuit, carrier recovery algorithm circuit, and IQ imbalance algorithm circuit, with a management circuit that adjusts the update frequency of algorithm coefficients based on signal-to-noise ratio thresholds to reduce power consumption while maintaining system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the update frequency of algorithm coefficients is increased to maintain high system performance, then the signal processing accuracy is improved, but the power consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of coefficient update frequency based on signal-to-noise ratio conditions. The management circuit monitors SNR and adapts the update rate of equalization, carrier recovery, and IQ imbalance coefficients in real-time, transitioning between high-update modes (when SNR is low) and low-update modes (when SNR is high), thereby optimizing the trade-off between processing accuracy and power consumption
Solution Approach 2:
The system changes the update frequency parameter of algorithm coefficients based on operating conditions. When signal-to-noise ratio exceeds a threshold, the update frequency is reduced (e.g., from every clock cycle to every N cycles), directly modifying the temporal parameter of coefficient updates to reduce computational load and power consumption while maintaining acceptable performance
2Use of energy by moving object
If the update frequency of algorithm coefficients is decreased to reduce power consumption, then the power consumption is reduced, but the system performance degradation occurs
Solution Approach 1:
The patent incorporates a feedback mechanism where the management circuit continuously monitors the signal-to-noise ratio and uses this information to control the coefficient update frequency. When SNR drops below a threshold, the system automatically increases update frequency to maintain performance, and when SNR is high, it reduces update frequency to save power, creating a closed-loop control system that adapts to changing conditions
3Adaptability or versatility
If the algorithm coefficient update circuits operate continuously at high frequency, then the system adaptability is improved, but the heat dissipation increases
Solution Approach 1:
The system implements periodic coefficient updates rather than continuous updates. The management circuit controls the update circuits to operate periodically based on SNR conditions, enabling them to update coefficients at intervals (e.g., every N clock cycles) rather than continuously, thereby reducing average power consumption and heat dissipation while maintaining system adaptability when needed
Data Source
AI summary
The present application discloses a dynamic power consumption management system, comprising: an equalization algorithm circuit, a carrier recovery algorithm circuit, and an IQ imbalance algorithm circuit; an equalization algorithm coefficient update circuit connected to an output end of the carrier recovery algorithm circuit and configured to provide equalization algorithm update coefficients to the equalization algorithm circuit; a carrier recovery frequency offset and phase noise calculation circuit connected to an output end of the equalization algorithm circuit and configured to provide carrier recovery frequency offset and phase noise coefficients to the carrier recovery algorithm circuit; an IQ imbalance algorithm coefficient update circuit connected to an output end of the IQ imbalance algorithm circuit and configured to provide IQ imbalance algorithm coefficients to the IQ imbalance algorithm circuit; a signal-to-noise ratio reporting circuit connected to an output end of the IQ imbalance algorithm circuit and configured to acquire a signal-to-noise ratio of the entire system; and a management circuit configured to determine the equalization algorithm update coefficients, the carrier recovery frequency offset and phase noise coefficients, and the IQ imbalance algorithm coefficients based on the signal-to-noise ratio. The present application can reduce the power consumption of chips.