Antenna Measurement Pattern Averaging for Signal Direction Detection
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Solution Overview
Problem
Low-end wireless communication devices face challenges in implementing direction-related functionality using limited hardware and software resources, requiring efficient signal processing methods to determine signal direction accurately.
Innovation Solution
A method involving a receiver configured to measure signal responses in multiple antennas using a pattern, with subsequent averaging of measurements taken before and after altering the pattern, to determine the direction of signal arrival, which can be weighted to identify the primary signal direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single receiver is used to measure signal responses in multiple antennas through time-multiplexed patterns, then device complexity and cost are reduced, but measurement precision deteriorates due to frequency fluctuations during sequential measurements
Solution Approach 1:
The patent applies preliminary action by measuring signal responses in multiple antennas sequentially before frequency fluctuations significantly affect the measurements. By establishing a measurement pattern that completes all antenna measurements within a short time window, the system captures signal responses before frequency drift occurs, thereby maintaining measurement precision while using a single receiver
Solution Approach 2:
The patent implements feedback by measuring signal responses in multiple passes with different patterns and combining the results. The system performs initial measurements, then performs additional measurements with altered patterns, and finally combines these measurements to compensate for frequency fluctuations. This feedback mechanism allows the single receiver to achieve accuracy comparable to multiple simultaneous receivers
2Device complexity
If signal responses are measured sequentially in multiple antennas using a single receiver, then device complexity is reduced, but frequency fluctuation effects increase causing measurement errors
Solution Approach 1:
The patent applies periodic action by performing repeated measurement cycles with different patterns. The system measures signal responses in multiple antennas through sequential patterns, then repeats the measurements with altered patterns, and combines results from these periodic measurement cycles. This periodic repetition allows the system to average out frequency fluctuation effects and maintain reliable directional determination
Solution Approach 2:
The patent implements parameter changes by varying the measurement pattern between different measurement passes. The system changes the order in which antennas are measured, or changes which antennas are measured in each pass. By altering these measurement parameters across multiple passes, the system compensates for frequency drift and maintains measurement reliability
Data Source
AI summary
A system for measuring signals received by an apparatus. An antenna system in the apparatus may include two or more antennas. A receiver in the apparatus may be configured to measure signal response induced in the antenna system in accordance with a pattern. After the signal response for the antenna system is measured at least once, the pattern may be altered and the signal response for the antenna system may be measured again in accordance with the altered pattern. The signal response in the antenna system measured for the pattern may then be averaged with the signal response in the antenna system measured for the altered pattern, and the average may be utilized as input to, for example, a directional determination process.