Long Range Radar Signal Simulation for Medium Range Measurement
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Solution Overview
Problem
Medium range radars (MRR) consume excessive frequency resources, necessitating a method to reduce these resources without compromising measurement accuracy.
Innovation Solution
Simulating MRR measurements using two long range radar (LRR) signals, each with an operating frequency bandwidth of 200 MHz, to avoid direct transmission of the MRR signal, thereby saving 1.6 GHz of air interface resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If medium range radar (MRR) is used for sensing, then measurement precision is improved, but frequency resource consumption increases
Solution Approach 1:
The patent uses long range radar (LRR) signals to simulate and copy the measurement function of medium range radar (MRR). Instead of transmitting actual MRR signals that consume 2GHz-3GHz frequency bandwidth, the system transmits LRR signals with 200MHz-300MHz bandwidth and processes them to achieve equivalent measurement results, thereby reducing frequency resource consumption while maintaining measurement capability
Solution Approach 2:
The patent changes the operating frequency parameter from MRR band (2GHz-3GHz) to LRR band (200MHz-300MHz). By adjusting the frequency parameter and using signal processing techniques including frequency offset correction and intermediate frequency generation, the system achieves MRR-like measurement precision using LRR frequency resources, thus resolving the contradiction between measurement precision and frequency resource consumption
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces frequency resource consumption while maintaining measurement accuracy by using the LRR signals to generate intermediate frequencies that simulate the MRR signal, allowing for efficient radar operation.
Implementation Method 1
The vehicle-mounted radar transmits a millimeter-wavelength electromagnetic wave to the outside. The electromagnetic wave reaches a target, and is reflected by the target to obtain an echo signal.
Implementation Method 2
Based on the echo signal and the transmitted electromagnetic wave, a frequency difference between the echo signal and the transmitted electromagnetic wave is obtained. For example, slopes of the echo signal and the transmitted electromagnetic wave may be the same, and the frequency difference between the echo signal and the transmitted electromagnetic wave may be referred to as an intermediate frequency IF.
Data Source
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AI summary
This application provides a radar measurement method and apparatus that are applied to the fields of wireless communication and autonomous driving/intelligent driving and that relate in particular to an application of a cooperative radar. The method includes: transmitting, by a radar, a first long range radar LRR signal, and receiving, a first echo signal corresponding to the first LRR signal (S201); transmitting, by the radar, a second LRR signal, and receiving a second echo signal corresponding to the second LRR signal (S202); and simulating, by the radar, a measurement of a medium range radar MRR based on the first echo signal and the second echo signal (S203). According to this method, the measurement of the medium range radar MRR may be simulated by using the long range radar LRR signal, to improve resource utilization and reduce interference between radars as much as possible. This can improve a capability of an autonomous driving or advanced driving assistant system ADAS of a vehicle, and may be applied to an internet of vehicles.