Wireless Chipset Radar Integration for Low-Cost Presence Detection
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Solution Overview
Problem
Existing wireless devices face challenges in cost-effective presence detection and localization using standalone radar solutions, as they are either costly or suffer from limitations such as privacy concerns, false positives, and inability to provide location information.
Innovation Solution
Integrate radar functionality into wireless chipsets using existing Wi-Fi/Bluetooth hardware, reusing transmit and receive chains for radar operations, enabling presence detection and localization with minimal additional costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standalone radar solutions are used for presence detection and localization, then measurement precision and reliability are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges radar functionality with existing Wi-Fi/Bluetooth wireless chipset hardware. The transmit chain and receive chain of the wireless chipset are reused for radar operations, combining multiple functions (wireless communication and radar sensing) into a single integrated system. This reduces device complexity and manufacturing cost while maintaining presence detection accuracy through the integrated radar wireless chipset.
Solution Approach 2:
The wireless chipset is designed to perform multiple functions: traditional Wi-Fi/Bluetooth wireless communication and radar-based presence detection and localization. By making the hardware universal and capable of dual operation modes (communication mode and radar mode), the patent eliminates the need for separate standalone radar hardware, thereby reducing system complexity while preserving measurement precision.
2Reliability
If standalone radar solutions are used for presence detection, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines radar sensing functionality with existing wireless communication hardware (transmit chain and receive chain). By merging these functions into a single integrated radar wireless chipset, the patent achieves reliable presence detection without requiring separate radar components, thereby reducing manufacturing cost while maintaining detection reliability.
Solution Approach 2:
The wireless chipset serves itself by using its existing transmit and receive chains for dual purposes: wireless communication and radar operations. This self-service approach eliminates the need for additional dedicated radar hardware, reducing manufacturing cost while maintaining the reliability needed for accurate presence detection and localization.
3Measurement precision
If additional sensors are added for sensor fusion, then measurement precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The wireless chipset is designed as a universal platform that performs both wireless communication and radar-based ambient sensing functions. By making the existing hardware multi-functional rather than adding separate sensors, the patent achieves the capability for sensor fusion and accurate ambient experience detection without increasing device complexity or manufacturing cost.
Solution Approach 2:
The wireless chipset provides ambient sensing capabilities through its own integrated radar functionality, serving the sensing need internally without requiring external additional sensors. This self-service approach maintains measurement precision for presence detection and localization while avoiding the complexity and cost associated with adding separate sensing components.
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
Provides credible presence or location information with minimal additional costs, allowing sensor fusion and low-cost ambient experience on wireless devices without needing extra sensors.
Implementation Method 1
a transmit antenna coupled to the processing device, a receive antenna coupled to the processing device, a radio frequency (RF) path between the transmit antenna and the receive antenna
Implementation Method 2
first radar data for a first frame is generated based on signal received at the receive antenna, with the first radar data representing both a reflection of a signal transmitted using the transmit antenna
Data Source
AI summary
Technologies directed to providing a wireless chipset with integrated radar are described. A wireless device receives a first radar frame having leakage between a transmit antenna and a receive antenna. The wireless device receives a second radar frame having leakage between the transmit and receive antennas. The second radar frame is aligned to the first radar frame based on their respective leakages. A presence of a target is detected using the aligned second radar frame.