Chirp Frequency Synthesizer Control for Integrated Wireless Radar
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Solution Overview
Problem
Existing electronic devices face challenges in executing a radar function independently of analog-digital converters (ADCs) used for wireless data transmission, requiring methods to reduce power consumption and integrate radar functionality without additional hardware.
Innovation Solution
The electronic device utilizes hardware for wireless data transmission to generate a wireless signal with a gradually changing frequency, employing multiple frequency synthesizing circuits and processors to adjust frequencies based on preset intervals, enabling radar functionality without dedicated radar-specific circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hardware dedicated to radar function is added, then radar functionality is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent applies multi-functionality by enabling existing wireless communication hardware (frequency synthesizing circuits, ADCs, antennas) to perform both wireless data transmission and radar functions. The communication processor controls the frequency synthesizing circuits to generate chirp signals for radar while using the same hardware infrastructure, eliminating the need for dedicated radar hardware and reducing overall device complexity.
Solution Approach 2:
The patent merges radar functionality into the existing wireless communication system by integrating radar signal generation and processing within the communication processor and frequency synthesizing circuits. This consolidation allows the system to execute radar functions independently of dedicated ADCs while sharing hardware resources, thereby reducing device complexity without sacrificing radar reliability.
2Reliability
If hardware dedicated to radar function is added, then radar functionality is improved, but power consumption increases
Solution Approach 1:
The patent reduces power consumption by making existing high-power wireless communication hardware perform dual functions. The frequency synthesizing circuits and ADCs used for data transmission are also utilized for radar operations, eliminating the need for separate dedicated radar hardware that would consume additional power. The communication processor manages both functions efficiently, optimizing energy usage.
3Measurement precision
If frequency of wireless signal is changed rapidly, then radar measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic frequency control by using the communication processor to dynamically adjust the frequency of wireless signals through the frequency synthesizing circuits. The system generates chirp signals with gradually changing frequencies, where the communication processor dynamically modifies frequency parameters based on radar measurement requirements, achieving high distance measurement precision without requiring complex dedicated radar frequency control hardware.
Solution Approach 2:
The patent achieves precise distance measurement by changing frequency parameters of the wireless signal over time. The communication processor controls the frequency synthesizing circuits to vary the signal frequency according to a chirp pattern, where frequency changes are precisely controlled through parameter modulation. This approach enables accurate radar measurements while utilizing the flexible parameter control capabilities of existing communication hardware.
4Device complexity
If ADC is used for both wireless data transmission and radar function, then device complexity is reduced, but power consumption increases
Solution Approach 1:
The patent implements periodic action by executing radar functions independently of continuous ADC operation for data transmission. The communication processor controls the frequency synthesizing circuits to generate radar chirp signals at specific time intervals, allowing the ADC to be activated only when radar measurements are required. This periodic execution of radar functions reduces the overall power consumption of the ADC compared to continuous operation, while still maintaining integrated hardware architecture.
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 allows the electronic device to perform radar functions efficiently, reducing power consumption and eliminating the need for additional hardware, while maintaining effective distance measurement capabilities.
Implementation Method 1
a first frequency synthesizing circuit configured to output a second electronic signal for converting a frequency of a first electronic signal to a frequency in a first preset frequency bandwidth, based on a first clock signal
Implementation Method 2
an intermediate frequency circuit for outputting, by converting a frequency of a first electronic signal included in a baseband bandwidth to a frequency in an intermediate frequency bandwidth indicated by a combination of a frequency of the first clock signal and a first multiplier included in a first control signal, a second electronic signal
Implementation Method 3
a radio frequency circuit for outputting, by converting a frequency of the second electronic signal to a frequency included in a radio frequency bandwidth, at least based on a combination of a frequency of the second clock signal and a second multiplier included in a second control signal, a third electronic signal
Data Source
AI summary
In an embodiment, an electronic device may include a first frequency synthesizing circuit outputting a second electronic signal from a first electronic signal, a second frequency synthesizing circuit outputting a fourth electronic signal for converting a frequency of a third electronic signal obtained from the first electronic signal based on the second electronic signal, and a communication processor. The communication processor may be configured to transmit, to the first frequency synthesizing circuit, a first parameter indicating a frequency of the second electronic signal, and changing based on a first preset frequency interval according to a first preset period. The communication processor may be configured to transmit, to the second frequency synthesizing circuit, a second parameter indicating a frequency of the fourth electronic signal based on a frequency of a second clock signal, and changing based on a second preset frequency interval different from the first preset frequency interval.