Ethernet Signal Receiver Gain Control Seed Collision
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Solution Overview
Problem
Existing Ethernet signal receiving devices face challenges in effectively updating filter coefficients due to seed collision, particularly when ambient temperature changes require adjustments in programmable gain amplifier settings, which can conflict with noise canceller and equalizer operations, leading to operational failures.
Innovation Solution
A signal receiving device with a control circuit that temporarily stops updating setting parameters and filter coefficients during seed collision, allowing for timely completion of updates and avoiding errors by managing the gain control and noise canceller operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the gain control circuit updates setting parameters in response to ambient temperature changes, then the signal reception accuracy is improved, but seed collision occurs with noise cancellers and equalizers causing operational failures
Solution Approach 1:
The control circuit detects whether a noise canceller or equalizer is in the process of updating filter coefficients before allowing the gain control circuit to update setting parameters. This preliminary detection prevents seed collision by stopping the gain update only when necessary, ensuring both accurate signal reception and operational stability.
2Productivity
If multiple noise cancellers and equalizers update filter coefficients simultaneously using the same data code, then individual updating speed is maintained, but seed collision occurs causing coefficients to fail to converge
Solution Approach 1:
The control circuit continuously monitors the updating state of noise cancellers and equalizers, using feedback information to determine whether to allow the gain control circuit to update setting parameters. This feedback mechanism prevents seed collision while maintaining efficient updates, ensuring both speed and convergence accuracy.
3Adaptability or versatility
If the gain control circuit continuously updates setting parameters to adapt to temperature changes, then adaptability is improved, but conflicts with noise canceller and equalizer operations cause failures
Solution Approach 1:
The system dynamically adjusts the updating behavior of the gain control circuit based on the real-time state of noise cancellers and equalizers. When these components are updating filter coefficients, the gain control circuit pauses its updates; otherwise, it proceeds with updates to adapt to temperature changes. This dynamic coordination maintains both adaptability and operational stability.
Data Source
AI summary
This invention discloses a signal receiving device for Ethernet and a control method thereof. The signal receiving device includes a gain control circuit, an alien near-end crosstalk canceller, a noise canceller, and a DFE. The gain control circuit adjusts an input signal of the signal receiving device according to a setting parameter. The alien near-end crosstalk canceller cancels an alien near-end crosstalk interference. The noise canceller uses a first filter to cancel noises. The DFE uses a second filter to cancel an inter-symbol interference of the input signal. The method includes steps of: temporarily stopping the gain control circuit from updating the setting parameter before a seed collision occurs, and temporarily stopping one of the noise canceller and the decision feedback canceller from updating the first filter coefficient of the first filter or the second filter coefficient of the second filter temporarily during the seed collision.