Receiver ADC Deferred Resolution for Low-Power Signal Recovery
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Solution Overview
Problem
Digital communication systems face challenges in recovering signals embedded within noise and impairments while balancing power constraints and performance, leading to excessive power usage due to unnecessary full resolution conversions.
Innovation Solution
Implementing deferred resolution techniques in digital receivers, utilizing a modified analog-to-digital converter (ADC) architecture that converts only the most significant bits initially and defers the conversion of least significant bits until necessary, combined with equalization methods like decision feedback equalization and maximum likelihood sequence estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If full resolution ADC conversion is performed for all symbols, then measurement precision is improved, but use of energy increases excessively
Solution Approach 1:
The patent applies partial action by performing full resolution ADC conversion only for symbols that fall within a specific region of interest, rather than converting all symbols at full resolution. The system determines a region based on the received signal and performs deferred resolution only where needed, thus reducing overall power consumption while maintaining necessary measurement precision for critical symbols
Solution Approach 2:
The patent implements local quality by applying different resolution levels to different regions of the signal space. Symbols falling within the determined region receive full resolution conversion, while symbols outside this region undergo deferred resolution with lower computational effort. This localized approach optimizes the balance between power consumption and measurement precision for each symbol based on its position
2Measurement precision
If full resolution ADC conversion is performed for all symbols, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system performs partial action by applying full resolution conversion only to symbols within the determined region, while using simplified deferred resolution processing for symbols outside this region. This reduces the overall computational complexity and processing burden while maintaining adequate precision for symbols that require it
Solution Approach 2:
The patent segments the signal processing into two distinct paths: one for symbols within the determined region that receive full resolution conversion, and another for symbols outside this region that undergo deferred resolution. This segmentation divides the complex processing task into manageable segments with different complexity levels
3Use of energy by moving object
If deferred resolution is implemented, then use of energy is reduced, but measurement precision may deteriorate for some symbols
Solution Approach 1:
The patent applies local quality by ensuring that symbols within the determined region (where precision is critical) receive full resolution conversion, while symbols outside this region can tolerate deferred resolution with reduced precision. This localized differentiation maintains measurement precision where needed while reducing power consumption overall
Solution Approach 2:
The system dynamically changes the resolution parameter based on the symbol's position relative to the determined region. Full resolution is applied to symbols within the region, while deferred resolution (lower effective resolution) is applied to symbols outside. This parameter adaptation balances power consumption and measurement precision based on local signal characteristics
Data Source
AI summary
A method may include receiving, at a receiver, a signal including a symbol. The method may include performing, at the receiver in a first stage, a first operation to determine one or more most significant bits of the symbol. The method may include outputting, at the receiver, the one or more most significant bits when the one or more most significant bits falls within a hard resolution region.