Radar Sensing Using Communication Signals
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Solution Overview
Problem
Communication systems using high frequencies face challenges in enabling radar sensing due to overlapping frequency ranges with radar systems, requiring innovative methods to utilize existing communication infrastructure for dual functionality.
Innovation Solution
A method that utilizes wireless communication signals for radar sensing by receiving and processing reflected signals within the radar frequency range, allowing for extraction of object distance and velocity information using standard communication system components, particularly focusing on comparing data payloads and preambles to generate ambiguity functions for precise object attributes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If communication systems use high frequencies for high bandwidth communication, then communication bandwidth is improved, but radar sensing capability deteriorates due to frequency overlap with radar systems
Solution Approach 1:
The patent applies multi-functionality by enabling the communication system to perform both communication and radar sensing functions using the same high-frequency spectrum. The receiver is configured to process communication signals for communication purposes and simultaneously process reflected signals for radar sensing, extracting delay and velocity information from the same frequency band without requiring separate dedicated radar hardware.
2Device complexity
If standard communication system components are used for radar sensing, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent extracts only the necessary processing functions from dedicated radar systems and implements them within the communication receiver. Specifically, it extracts the signal reflection reception, delay information extraction, and velocity information extraction functions, configuring the receiver to perform these operations on communication signals without requiring complete radar system replacement.
Solution Approach 2:
The patent changes the operational parameters of the communication receiver to enable radar sensing. By configuring the receiver to process signals for both communication and radar functions, adjusting processing parameters to extract delay and velocity information from the same signals used for communication, it achieves precise radar measurements using communication hardware.
3Ease of manufacture
If the receiver part is modified for radar sensing while transmitter remains standard, then manufacturing cost is reduced, but adaptability deteriorates
Solution Approach 1:
The patent segments the radar sensing function from the communication transmission function by modifying only the receiver part while keeping the transmitter standard. This segmentation allows the communication system to maintain its standard transmission capabilities while adding radar sensing capability at the reception end, reducing manufacturing complexity and cost.
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 costs and complexity by affecting only the receiver part of the communication system, providing flexible and precise radar sensing capabilities with improved signal/noise ratios and velocity resolution, while maintaining communication functionality.
Implementation Method 1
receiving a reflected communication signal, wherein the reflected communication signal is a sent communication signal that is reflected by at least one object
Implementation Method 2
extracting a delay information and/or a velocity information of the at least one object from the compared data payload
Implementation Method 3
extracting a delay information and/or a velocity information of the at least one object from the compared data payload
Data Source
AI summary
The disclosure relates to the field of radar sensors, particularly to radar sensors for radar sensing using wireless communication signals. The method includes: receiving a reflected communication signal, wherein the reflected communication signal is a sent communication signal that is reflected by at least one object. The frequency of the sent communication signal is within a radar frequency range, and the sent communication signal includes a sent data payload, and the reflected communication signal includes a corresponding reflected data payload. The reflected data payload is compared with the sent data payload, resulting in a compared data payload; and a delay information and/or a velocity information of the at least one object is extracted from the compared data payload.