Shared Antenna Coupling for Accurate Channel Sounding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wireless communication devices face challenges in accurately determining distance due to multipath interference or fading, which can lead to faulty distance measurements, and adding more Bluetooth antennas for diversity increases physical footprint and isolation requirements.
Innovation Solution
Wireless communication devices utilize antennas dedicated for a second communication technology to detect signals for channel sounding events, allowing both radios to process composite signals simultaneously, thereby reducing the number of required antennas and maintaining uninterrupted operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If more Bluetooth antennas are added for diversity to improve distance measurement accuracy, then measurement precision is improved, but device complexity and physical footprint increase
Solution Approach 1:
The patent applies universality by enabling Wi-Fi antennas to perform dual functions: their primary function for Wi-Fi communication and a secondary function for Bluetooth channel sounding. The Wi-Fi radio detects composite signals containing both Wi-Fi and Bluetooth components, allowing the same antenna infrastructure to serve multiple communication technologies without requiring dedicated Bluetooth antennas for every function.
Solution Approach 2:
The patent merges the signal detection functions of separate Wi-Fi and Bluetooth antenna systems. By combining composite signals received at the Wi-Fi radio with known Wi-Fi reference signals, the system extracts Bluetooth channel sounding information from the same physical antenna array used for Wi-Fi, thereby combining multiple communication functions into a unified antenna system.
2Measurement precision
If more Bluetooth antennas are added for diversity to improve distance measurement accuracy, then measurement precision is improved, but area of the device increases
Solution Approach 1:
The patent applies universality by enabling Wi-Fi antennas to perform dual functions: their primary function for Wi-Fi communication and a secondary function for Bluetooth channel sounding. The Wi-Fi radio detects composite signals containing both Wi-Fi and Bluetooth components, allowing the same antenna infrastructure to serve multiple communication technologies without requiring dedicated Bluetooth antennas for every function.
3Measurement precision
If more Bluetooth antennas are added for diversity to improve distance measurement accuracy, then measurement precision is improved, but isolation requirements increase
Solution Approach 1:
The patent applies universality by enabling Wi-Fi antennas to perform dual functions: their primary function for Wi-Fi communication and a secondary function for Bluetooth channel sounding. The Wi-Fi radio detects composite signals containing both Wi-Fi and Bluetooth components, allowing the same antenna infrastructure to serve multiple communication technologies without requiring dedicated Bluetooth antennas for every function.
Data Source
AI summary
Systems and methods are provided for channel sounding techniques, such as High-Accuracy-Distance-Measurement (HADM), for phase-based ranging. By utilization of a coupler, antennas on a multi-radio device can be shared to provide the diversity for HADM, without affecting other radio functions. Examples include at least a first antenna coupled to a first radio. The first radio is configured to process signals received from a peripheral device via the first antenna. Examples also include a first radio coupled to a second antenna and configured to selectively receive signals from the peripheral device via the second antenna. The second radio is configured for a different communication technology than the first radio.