UWB First-Path Detection Using Partial Symbol Amplification
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Solution Overview
Problem
Current UWB systems are limited in first path dynamic range, which hampers high-precision ranging and positioning applications.
Innovation Solution
A communication device with an analog-to-digital converter, symbol accumulator, enhanced and normal first path searchers, and a selector, along with a first path dynamic range generator, amplifies and accumulates input symbols to enhance the detection of the first path signal, using a preset proportion and AGC circuit to adjust gain, thereby improving the first path dynamic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the current UWB system uses conventional symbol accumulation without amplification, then the system complexity remains low, but the first path dynamic range is limited and cannot be improved
Solution Approach 1:
The patent divides the symbol processing into two separate paths: an enhanced first path searcher that accumulates amplified symbols and a normal first path searcher that accumulates unamplified symbols. This segmentation allows the system to improve first path dynamic range through selective amplification while maintaining compatibility with conventional systems, thereby resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The patent changes the amplification parameter by amplifying only a preset proportion (less than 1/2) of the symbols rather than all symbols. This partial amplification approach enhances the first path dynamic range while controlling the increase in system complexity, as the amplification can be applied selectively to specific symbols in the sequence.
2Measurement precision
If all symbols are amplified and accumulated, then the first path dynamic range is maximized, but the system complexity and processing overhead increase significantly
Solution Approach 1:
The patent applies partial action by amplifying only a preset proportion of symbols (less than 1/2) rather than all symbols. This partial amplification is sufficient to improve the first path dynamic range while avoiding the excessive processing overhead that would result from amplifying every symbol, thus resolving the contradiction between measurement precision and energy consumption.
3Device complexity
If no symbol amplification is applied, then the system operates with low complexity, but the detection capability for weaker first path components is insufficient
Solution Approach 1:
The patent applies local quality by selectively amplifying specific symbols (a preset proportion less than 1/2) rather than uniformly processing all symbols. This localized amplification enhances the detection capability for weaker first path components in critical positions while keeping the overall system complexity low, resolving the contradiction between device complexity and reliability.
Data Source
AI summary
A method of operating a communication device includes amplifying a preset proportion of symbols in a set of input symbols to generate a set of amplified symbols, accumulating the set of amplified symbols to generate an enhanced symbol, searching for a first path according to the enhanced symbol, accumulating unamplified symbols in the set of input symbols to generate an normal symbol, and searching for the first path according to the normal symbol. The method further includes generating a first path signal if the first path is found according to the enhanced symbol and/or the normal symbol, and generating a first path dynamic range (FPDR) according to at least the first path signal.