Radar Echo Identification With Distinct Wavelengths And Delays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Radar systems face challenges in accurately distinguishing between reflected signals and interference signals due to their similar characteristics, leading to inaccurate object measurement.
Innovation Solution
The radar system generates and transmits multiple first signals with distinct wavelengths and/or delays, enabling the controller to identify echo signals based on these characteristics, thereby improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radar system uses a single transmit signal, then the device complexity is low, but the measurement precision deteriorates due to inability to distinguish echo signals from interference signals
Solution Approach 1:
The patent segments the single transmit signal into multiple first signals with different characteristics (wavelengths and/or delays). This segmentation allows the radar system to distinguish echo signals from interference signals by matching the characteristics of received signals with the known characteristics of transmitted signals, thereby improving measurement precision without requiring multiple independent transmit sources
Solution Approach 2:
The patent changes the parameters (wavelength and/or delay) of the transmit signals to create distinguishable first signals. By transmitting N first signals with different wavelengths and/or delays and comparing the characteristics of received signals with these known parameters, the system can identify echo signals even in the presence of interference, resolving the contradiction between measurement precision and device complexity
2Measurement precision
If the radar system transmits multiple signals with different characteristics, then the measurement precision is improved, but the use of energy increases
Solution Approach 1:
The patent segments energy transmission into multiple distinct first signals with different characteristics. Each signal carries a portion of the total energy, and by segmenting them with different wavelengths and/or delays, the system can identify echo signals more accurately while distributing the energy load, thus improving measurement precision without excessive energy consumption
3Measurement precision
If the radar system uses multiple lasers to generate signals with different wavelengths, then the measurement precision is improved, but the device complexity and cost increase
Solution Approach 1:
The patent merges the functionality of multiple lasers into a single laser system. Instead of using N separate lasers to generate N different wavelengths, the invention uses one laser to generate N first signals with different characteristics through signal processing, thereby achieving the same measurement precision improvement while reducing device complexity and cost
Solution Approach 2:
The patent creates multiple signal copies from a single laser source. By copying the laser output and modifying the characteristics (wavelength and/or delay) of each copy, the system generates N distinguishable first signals without requiring N physical lasers, thus improving measurement precision while maintaining low device complexity
Data Source
AI summary
Embodiments of this application provide a radar system, and a signal processing method and apparatus. The radar system includes: a transmitting assembly, a receiving assembly, and a controller. The transmitting assembly is configured to generate and transmit N first signals, where characteristics of the N first signals are different, the characteristic includes a wavelength and/or a delay, and N is an integer greater than 1; the receiving assembly is configured to receive a second signal; and the controller is configured to determine, based on the characteristics of the N first signals, whether the second signal includes an echo signal corresponding to the first signal.