Radar Path Delay Estimation for Phase Noise Correction
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Solution Overview
Problem
Existing wireless communication devices face challenges in maintaining signal integrity due to characteristics that affect the path delay and phase noise introduced by transmitter and receiver circuits.
Innovation Solution
A radar device with a transmitter and receiver circuit and an estimation circuit that generates estimated path delay and phase noise to improve signal integrity by using dechirp, correlation, and arctangent calculations to estimate and correct these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transmitter and receiver circuit is used to generate and process signals in a radar device, then the radar device can perform wireless signal transmission and reception, but the characteristics of the transmitter and receiver circuit introduce path delay and phase noise that degrade signal integrity
Solution Approach 1:
The patent implements a feedback mechanism where the estimated path delay and phase noise from the estimation circuit are fed back to the back-end circuit to compensate for the harmful effects. The back-end circuit uses these estimates to correct the received signal, thereby improving signal integrity despite the presence of path delay and phase noise introduced by the transmitter and receiver circuit.
Solution Approach 2:
The estimation circuit acts as an intermediary component that processes the received signal to extract path delay and phase noise information. This intermediary circuit enables the system to measure and subsequently correct the harmful effects without requiring direct modification of the transmitter and receiver circuit characteristics.
2Measurement precision
If the transmitter and receiver circuit characteristics are used for signal processing, then the device can operate with existing circuit designs, but the path delay and phase noise affect measurement precision
Solution Approach 1:
The patent segments the signal processing function into distinct components: the transmitter and receiver circuit for signal generation and reception, the estimation circuit for parameter extraction, and the back-end circuit for compensation. This segmentation allows each component to be optimized independently while maintaining overall system performance.
Solution Approach 2:
The estimation circuit performs self-service by automatically estimating the path delay and phase noise from the received signal without requiring external calibration or manual adjustment. This self-service capability enables the system to adapt to varying conditions while maintaining measurement precision.
3Reliability
If path delay and phase noise are not corrected, then the device complexity remains low, but signal integrity and radar performance deteriorate
Solution Approach 1:
The estimation circuit is designed to perform multiple functions: it estimates both path delay and phase noise from the same received signal, and provides both parameters to the back-end circuit for comprehensive compensation. This multi-functionality reduces the need for separate dedicated circuits for each type of correction.
Solution Approach 2:
The patent changes the parameter representation by estimating path delay and phase noise as explicit parameters from the received signal characteristics. This parameter transformation enables the back-end circuit to apply targeted corrections using standard signal processing techniques, balancing complexity and performance improvement.
Data Source
AI summary
A radar device includes a transmitter and receiver circuit and an estimation circuit. The transmitter and receiver circuit is configured to generate a second signal according to a first signal. The estimation circuit is coupled to the transmitter and receiver circuit and is configured to generate an estimated path delay according to the second signal for a back-end circuit to execute a related application.