Bayerische Motoren Werke has patented an apparatus that determines the distance between a transmitter and a receiver using radio communication. It measures received signal strength and time-of-flight values, comparing them with stored data to calculate the distance based on the comparison results. GlobalData’s report on Bayerische Motoren Werke gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Bayerische Motoren Werke, Battery management systems was a key innovation area identified from patents. Bayerische Motoren Werke's grant share as of June 2024 was 40%. Grant share is based on the ratio of number of grants to total number of patents.
Distance measurement between transmitter and receiver using radio signals
The patent US12044768B2 describes an innovative apparatus designed to determine the distance between a transmitter and a receiver using radio communication. The apparatus integrates a receiver and includes at least one measurer that captures both the received signal strength indicator (RSSI) value and the time-of-flight (ToF) value of the radio channel. A processor within the apparatus compares these measured values against stored pairs of RSSI and ToF values, which are associated with specific distances between the transmitter and receiver. This comparison enables the processor to accurately determine the distance based on the results.
Further enhancements to the apparatus include the capability to identify the transmitter and receive authentication information, ensuring secure communication. The measurer can perform simultaneous measurements of RSSI and ToF values multiple times, allowing the processor to establish a transmitter-specific probabilistic relationship for these measurements. This relationship aids in calculating and estimating distances across different ranges. Additionally, the apparatus can adjust the stored probabilistic relationship at predefined intervals or continuously, enhancing its accuracy. The measurer can utilize ultra-wideband links for RSSI measurements and Bluetooth Low Energy (BLE) links for ToF measurements, making the apparatus versatile for various applications, including scenarios where the transmitter is a mobile device and the receiver is a motor vehicle.
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