Variable-Resolution ADC Equalization for Low-Loss Receiver Channels
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Solution Overview
Problem
Existing digital data communication systems face inefficiencies in power consumption due to the need for full-bit processing in receivers, even when channels have low attenuation, distortion, and noise, leading to unnecessary power usage.
Innovation Solution
Implementing a variable resolution analog-to-digital converter (ADC) and processing logic that adjusts the number of bits based on channel attenuation, reducing power consumption by disabling unused bits and logic sub-blocks in receivers connected to low-loss channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full-bit processing is used in receivers, then reliability is maintained across all channel conditions, but power consumption increases unnecessarily in low-loss channels
Solution Approach 1:
The receiver dynamically adjusts its processing resolution based on real-time channel conditions. The system transitions from static full-bit processing to adaptive variable-resolution processing, where the number of processed bits changes according to channel attenuation levels. This dynamic adaptation maintains reliability when needed while reducing power consumption in favorable conditions.
Solution Approach 2:
The system changes the processing parameter (number of bits processed) based on channel conditions. By monitoring channel attenuation and adjusting the processing resolution accordingly, the receiver optimizes the balance between reliability and power consumption. Full-bit processing is applied only when channel conditions warrant it, otherwise lower-resolution processing suffices.
2Use of energy by moving object
If variable resolution processing is implemented, then power consumption is reduced in low-loss channels, but device complexity increases
Solution Approach 1:
The processing logic is segmented into multiple resolution levels, with different processing paths for different bit depths. The receiver is divided into functional blocks that can be selectively activated based on channel conditions, allowing granular control over power consumption while managing complexity through modular design.
Solution Approach 2:
The receiver is designed with multi-functional processing blocks that can operate at different resolution levels. The same hardware infrastructure supports both full-bit and reduced-resolution processing, eliminating the need for completely separate systems and thereby limiting the increase in device complexity.
3Measurement precision
If full processing resolution is used, then measurement precision is maintained, but loss of energy increases
Solution Approach 1:
The system applies partial processing action by processing only the necessary number of bits required for the given channel conditions. Instead of always performing full-bit processing, the receiver processes exactly the resolution needed, avoiding excessive energy consumption while maintaining sufficient measurement precision for the current channel quality.
Data Source
AI summary
A receiver includes a variable resolution analog-to-digital converter (ADC) and variable resolution processing logic/circuitry. The processing logic may use feed-forward equalization (FFE) techniques to process the outputs from the ADC. When receiving data from a channel having low attenuation, distortion, and/or noise, the ADC and processing logic may be configured to sample and process the received signal using fewer bits, and therefore less logic, than when configured to receiving data from a channel having a higher attenuation, distortion, and/or noise. Thus, the number of (valid) bits output by the ADC, and subsequently processed (e.g., for FFE equalization) can be reduced when a receiver of this type is coupled to a low loss channel. These reductions can reduce power consumption when compared to operating the receiver using the full (i.e., maximum) number of bits the ADC and processing logic is capable of processing.