Wireless Communication Device FAP Time Index Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication devices using ultra-wideband (UWB) communication struggle to provide accurate time of arrival (ToA) measurements in multipath environments due to time errors introduced by multiple signal copies with different characteristics.
Innovation Solution
A wireless communication device compensates for the first arrival path (FAP) time index by comparing received signals with a reference signal to generate a compensation index, which is then used to calculate a final FAP time index, reducing time errors and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional ToA measurement method is used in multipath environment, then measurement process is simple, but measurement precision deteriorates due to time errors from multiple signal copies
Solution Approach 1:
The patent segments the signal processing into distinct components: reference signal generation, correlation processing, peak detection, and compensation calculation. By dividing the complex ToA measurement into separate functional blocks, the system achieves high measurement precision while maintaining manageable processing complexity through modular architecture.
Solution Approach 2:
The patent introduces a reference signal as an intermediary element that mediates between the received multipath signal and the final ToA calculation. This reference signal serves as a mediator to extract accurate timing information by comparing the received signal characteristics against the known reference, thereby achieving precise measurements even in complex multipath environments.
2Measurement precision
If FAP time index compensation is applied, then ToA measurement accuracy improves, but processing time increases
Solution Approach 1:
The patent performs preliminary actions by pre-generating reference signals and pre-calculating compensation factors based on signal characteristics. This preliminary processing allows the main ToA measurement to proceed more quickly, as the complex compensation calculations are based on pre-computed values, thereby reducing overall processing time while maintaining high accuracy.
Solution Approach 2:
The patent replaces complex mechanical signal processing operations with more efficient computational methods. Instead of using computationally intensive time-domain processing, the system substitutes with frequency-domain correlation and mathematical compensation formulas, which are faster and more efficient, thereby reducing processing time while improving measurement accuracy.
Data Source
AI summary
A first wireless communication apparatus includes: a transceiver configured to: receive a radio frequency (RF) signal via a channel from a second wireless communication apparatus, and downconvert the RF signal to generate a received signal that has a lower frequency than a frequency of the RF signal; and a processing circuit configured to: compare the received signal with a reference signal to generate a compensation index based on a comparison result, and compensate an initial first arrival path (FAP) time index of the received signal based on the compensation index to generate a final FAP time index.