Signal Processing Circuit for UWB False Path Exclusion
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Solution Overview
Problem
Existing UWB systems struggle to effectively identify and exclude false transmission paths caused by interference signals from other users, leading to degraded reception performance.
Innovation Solution
A signal processing method and circuit that utilizes a channel estimation device, data processing circuit, and false path detection circuit to estimate transmission paths, process data portions, and determine characteristic values to identify and exclude false paths based on energy comparisons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel estimation is performed based on preamble portion using conventional methods, then transmission paths can be identified, but false transmission paths from interference signals cannot be distinguished from valid paths
Solution Approach 1:
The patent performs preliminary action by processing the data portion of the received signal to generate data demodulation results before final path validation. This intermediate processing step allows characteristic values to be calculated and compared, enabling the system to identify and exclude false paths before final reception decisions are made, thereby improving both measurement precision and reliability
Solution Approach 2:
The patent implements feedback by using data demodulation results from the data portion to validate and refine the initial channel estimation from the preamble portion. The characteristic values calculated from data processing provide feedback that confirms or rejects identified transmission paths, creating a closed-loop system that continuously improves path identification accuracy and reception performance
2Productivity
If multiple symbols in the preamble portion are combined for processing, then signal processing is performed, but virtual paths caused by interference from other users cannot be suppressed when preamble signals have the same content and symbol periods
Solution Approach 1:
The patent transitions from processing only the preamble portion to utilizing another dimension of the signal - the data portion. By processing data symbols in addition to preamble symbols, the system gains an additional dimension for path validation. The data demodulation results provide independent characteristic values that help distinguish true paths from virtual paths, enabling interference suppression that conventional preamble-only processing cannot achieve
Data Source
AI summary
A signal processing circuit includes a channel estimation device, a data processing circuit and a false path detection circuit. The channel estimation device estimates transmission paths of a received signal based on a preamble portion of the received signal to generate channel parameter information. The data processing circuit processes a data portion of the received signal according to the channel parameter information to generate a data demodulation result associated with each transmission path. The false path detection circuit determines a characteristic value based on the data demodulation result associated with each transmission path, determines whether corresponding transmission path is a false path according to the characteristic value and the channel parameter information, and updates the channel parameter information to generate updated channel parameter information in response to the corresponding transmission path being determined as a false path. The updated channel parameter information does not comprise information regarding the false path.