Adaptive Receiver Calibration for Channel Loss and PVT Variation
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Solution Overview
Problem
Existing receivers struggle to effectively handle channel loss, process variation, and temperature variation, leading to instability and reduced yield in communication applications.
Innovation Solution
A receiver with a channel compensator, decoder, and adaptive controller that performs adaptive calibration to adjust gain, reference voltage, and phase shift to compensate for these variations, using a decoder device with phase interpolator and voltage regulator to enhance stability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the receiver uses fixed gain and fixed reference voltage, then the device complexity is low, but the receiver cannot deal with channel loss, process variation, voltage variation or temperature variation
Solution Approach 1:
The patent implements dynamic adjustment mechanisms where the gain of the channel compensator and the magnitude of the reference voltage are no longer fixed but can be adaptively changed in response to varying operating conditions. This allows the receiver to maintain optimal performance across different channel conditions, PVT variations, and interference levels, directly resolving the contradiction between adaptability and complexity by introducing controlled dynamic elements.
Solution Approach 2:
The patent employs feedback mechanisms where the receiver continuously monitors the quality of the received signal and adjusts the gain and reference voltage accordingly. The feedback loop enables the system to automatically compensate for channel loss, process variations, voltage variations, and temperature variations, achieving high adaptability while keeping the complexity manageable through automated control rather than manual intervention.
2Reliability
If the receiver performs adaptive calibration to adjust gain and reference voltage, then the stability and yield improve, but the device complexity increases
Solution Approach 1:
The patent performs preliminary adaptive calibration during the initialization phase to pre-adjust the gain and reference voltage to optimal values before actual data reception begins. This preliminary action ensures that the receiver is properly configured for the current operating conditions, improving stability and yield from the start while limiting the complexity to a one-time calibration process rather than continuous complex adjustments.
Solution Approach 2:
The receiver incorporates self-service capabilities through automated calibration algorithms that use the received signal itself to determine the optimal gain and reference voltage settings. The system serves itself by extracting calibration information from the incoming signal without requiring external intervention or complex external calibration equipment, thereby improving reliability while keeping the added complexity minimal.
Data Source
AI summary
A receiver includes a channel compensator, a decoder and an adaptive controller. The channel compensator performs channel compensation on an input data signal to generates a feed-in data signal. The decoder demultiplexes a to-be-decoded data signal that originates from the feed-in data signal into multiple demultiplexed data signals, and decoding the demultiplexed data signals respectively into multiple decoded signals. Based on a decoded output that originates from the decoded signals, the adaptive controller performs adaptive calibration on the channel compensator to adjust a gain of the channel compensator with reference to an error portion of a first sample of the decoded signals and a data portion of a second sample of the decoded signals that is generated before the generation of the first sample of the decoded signals.