Multi-Antenna Spatial Ranging Circuitry for Low-Latency Object Detection
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Solution Overview
Problem
Existing electronic devices with wireless circuitry face challenges in accurately estimating distance using radio-frequency signals, especially in scenarios with multiple moving external objects, due to interference and high latency in signal processing.
Innovation Solution
The implementation of spatial ranging circuitry that concurrently transmits non-overlapping radio-frequency signals using multiple antennas, allowing processors to distinguish and process each signal independently, reducing latency and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If multiple radio-frequency ranging signals are transmitted concurrently using multiple antennas, then the latency of location detection is significantly reduced, but signal interference occurs between the transmitted signals
Solution Approach 1:
The patent applies parameter changes by using different frequency parameters for each transmitted ranging signal. Specifically, each antenna transmits a signal with a unique frequency or non-overlapping frequency spectrum, allowing concurrent transmission without interference. This enables multiple signals to be transmitted simultaneously (reducing latency) while maintaining distinguishability through frequency differentiation.
Solution Approach 2:
The patent segments the frequency spectrum into non-overlapping portions assigned to different transmit antennas. Each antenna operates in its designated frequency segment, preventing spectral overlap and interference. This segmentation allows concurrent transmission from multiple antennas while maintaining signal independence for accurate location detection.
2Measurement precision
If multiple external objects are present and moving within the field of view, then the complexity of accurately estimating distance increases, but the need for precise spatial ranging remains critical
Solution Approach 1:
The patent uses frequency as an intermediary parameter to differentiate between signals reflected from different external objects. By assigning unique frequency signatures to each transmit antenna's signal, the system can identify and process reflections from multiple objects simultaneously. The frequency parameter acts as a mediator that enables the processor to distinguish between multiple objects and their corresponding reflected signals, maintaining measurement precision while managing complexity through frequency-based signal identification.
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 enables accurate and efficient localization of multiple external objects by minimizing signal interference and reducing detection latency, improving the precision and speed of spatial ranging operations.
Implementation Method 1
A set of one or more antennas may receive reflected versions of the radio-frequency ranging signals transmitted by the set of transmit antennas
Implementation Method 2
The signal generator that concurrently transmits different radio-frequency ranging signals over respective transmit antennas in a set of two or more transmit antennas. The ranging signals may include waveforms with time-varying frequencies
Data Source
AI summary
An electronic device may include wireless circuitry that detects the location of external objects. A signal generator may concurrently transmit different radio-frequency ranging signals over two or more transmit antennas. The ranging signals may include waveforms with time-varying frequencies, where each waveform includes frequencies that are non-overlapping with the frequencies of each of the other waveforms at any given time. Antennas may receive reflected versions of the ranging signals and a processor may process the reflected versions of the ranging signals to identify the location of the external objects. This may prevent interference between the ranging signals and may significantly reduce the latency of location detection relative to examples where the ranging signals are transmitted by different transmit antennas in series.