Communication Device Arrival Direction Revision
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Solution Overview
Problem
Existing communication devices face challenges in accurately calculating the arrival direction of a signal due to individual differences among antennas, installation errors, and temperature changes, requiring frequent calibration, which increases costs, especially when infrastructure is well-furnished.
Innovation Solution
A communication device that acquires position information and error data from both itself and a transmission device, calculates the arrival direction, and revises it based on error thresholds and reliance degrees of the transmission path to achieve high accuracy without the need for regular calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the arrival direction is calculated using waveform analysis of signals, then the communication device can determine the transmission source direction, but the calculation is influenced by individual differences among antennas, installation errors, and temperature changes, requiring periodic calibration
Solution Approach 1:
The patent applies feedback by using the calculated arrival direction to adjust the phase of the received signal, then re-calculating the arrival direction based on the adjusted signal. This iterative feedback process continuously refines the arrival direction measurement, compensating for antenna individual differences, installation errors, and temperature changes without requiring external calibration devices.
Solution Approach 2:
The communication device performs self-calibration by autonomously calculating and adjusting the arrival direction based on its own received signals. The device uses its multiple antennas to measure phase differences, compute the arrival direction, and subsequently adjust the signal phase to maximize output voltage, thereby self-correcting measurement errors without external intervention.
2Measurement precision
If position information is acquired from a well-furnished infrastructure, then high accuracy arrival direction calculation is achieved, but the cost increases significantly
Solution Approach 1:
The communication device performs self-calibration by autonomously calculating and adjusting the arrival direction based on its own received signals. The device uses its multiple antennas to measure phase differences, compute the arrival direction, and subsequently adjust the signal phase to maximize output voltage, thereby self-correcting measurement errors without external intervention.
Solution Approach 2:
The patent applies feedback by using the calculated arrival direction to adjust the phase of the received signal, then re-calculating the arrival direction based on the adjusted signal. This iterative feedback process continuously refines the arrival direction measurement, compensating for antenna individual differences, installation errors, and temperature changes without requiring external calibration devices.
Data Source
AI summary
A communication device includes: an acquisition unit that acquires first position information indicating a first position of the communication device and first position error information indicating an error of the first position; a reception unit that receives second position information indicating a second position of a communication device and second position error information indicating an error of the second position acquired by the communication device; a first calculation unit that calculates a first arrival direction and a first arrival direction error based on one or more pieces of information out of the first position information and so on; a second calculation unit that calculates a second arrival direction; and a judgment unit that makes the second calculation unit revise the second arrival direction based on the first arrival direction when the first arrival direction error is smaller than a first threshold value.