MIMO UWB Radar Phase Compensation for Routing Line Mismatch
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Solution Overview
Problem
Ultra-wideband (UWB) radar systems face issues with range discrepancies due to uneven routing line lengths in multiple-input multiple-output (MIMO) radar systems, leading to inaccurate distance and angle estimation of detected objects.
Innovation Solution
A method for compensating UWB radar signals by determining and applying linear or circular shifts based on antenna channel line lengths, using simulation or measurement to align phase responses and account for non-linear wavelength changes, and applying compensation adjustments during transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If uneven routing line lengths are used in MIMO radar systems, then device complexity is reduced, but measurement precision deteriorates due to range discrepancies
Solution Approach 1:
The patent applies preliminary action by calculating and storing compensation values for phase and range discrepancies before radar signal processing. The system pre-computes correction factors based on known routing line length differences and applies these corrections to received signals, eliminating the need for real-time complex calculations and maintaining high measurement precision despite uneven routing configurations.
Solution Approach 2:
The patent changes parameters by introducing compensation values that adjust the phase and range parameters of received signals. By modifying these parameters through pre-calculated correction factors, the system compensates for the effects of uneven routing line lengths, thereby maintaining accurate distance and angle estimation without requiring uniform routing configurations.
2Measurement precision
If phase compensation is applied to correct range discrepancies, then measurement precision improves, but device complexity increases due to additional processing requirements
Solution Approach 1:
The patent reduces device complexity by performing preliminary calculations of compensation values offline. The complex phase compensation calculations are done in advance based on the known antenna element positions and routing line lengths, and the results are stored for direct application during radar operation. This shifts computational burden from real-time processing to pre-processing, maintaining measurement precision while simplifying operational complexity.
3Adaptability or versatility
If multiple compensation methods are implemented for different signal types, then adaptability improves, but device complexity increases
Solution Approach 1:
The patent applies local quality by implementing different compensation strategies tailored to specific signal types. For range-based signals, one compensation method is used, while for velocity-based signals, another method is applied. This localized approach optimizes performance for each signal type without requiring a single complex universal solution, thereby improving adaptability while managing device complexity through targeted implementations.
Data Source
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AI summary
A method includes determining a line length of an antenna channel. The method includes determining a phase response of a signal associated with the antenna channel. The method includes determining whether the phase response has met a set of linearization criteria. The method includes, in response to a determination that the phase response has met the set of linearization criteria, applying a linear shift to the phase response. The method includes determining whether the signal is a first or a second signal type. The method includes, in response to a determination that the signal is the first type, encoding the signal with the compensation adjustment before the signal is transmitted. The method includes, in response to a determination that the signal is the second type, applying the compensation adjustment to the signal by applying the compensation adjustment during FFT processing or by applying a circular shift.