Wireless Phase-Stable Signal Transmission via Laser Path Length Feedback
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Solution Overview
Problem
Wireless transmission of complex signals in dynamic environments, such as flying platforms, faces challenges due to continuous changes in the transmission path length, causing phase shifts that are difficult to correct, especially in high-frequency and antenna near-field measurements.
Innovation Solution
A device and method that synchronizes the transmission of electrically complex signals with simultaneous distance measurement, using laser technology to modulate signals parallel to the distance measurement section, allowing for precise correction of phase shifts through electrical phase shifters or post-processing calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless transmission is used for moving platforms, then mobility and measurement flexibility are improved, but phase stability deteriorates due to continuous path length changes
Solution Approach 1:
The system continuously measures the actual path length using distance measurement devices and feeds this information back to the signal transmission device. Based on this feedback, the system dynamically adjusts the phase of the transmitted signal through electrical phase shifters or post-processing calculations to compensate for path length changes, thereby maintaining phase stability while enabling wireless mobility
Solution Approach 2:
The system changes the phase parameter of the transmitted signal dynamically based on the measured path length. By adjusting the phase shift in real-time according to the actual distance between transmitter and receiver, the system compensates for path length variations and maintains stable phase relationships in the transmitted complex signals
2Stability of the object's composition
If wired transmission is used, then phase stability is maintained, but mobility and measurement flexibility are limited
Solution Approach 1:
The patent introduces distance measurement devices as an intermediary between the transmitter and receiver. These devices continuously monitor the path length and provide information that enables phase compensation, allowing the system to achieve both wireless mobility and phase stability that would otherwise be incompatible
3Device complexity
If path length changes are not corrected, then transmission simplicity is maintained, but measurement precision deteriorates
Solution Approach 1:
The system performs preliminary measurement of the path length using distance measurement devices before and during signal transmission. By knowing the actual path length in advance and during transmission, the system can pre-calculate or dynamically adjust phase corrections, ensuring measurement precision is maintained without requiring complex real-time processing during the actual measurement
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 ensures accurate and stable wireless transmission of complex signals, maintaining measurement integrity even with changing path lengths, enhancing measurement capabilities for large antenna systems and installations with high antenna density.
Implementation Method 1
The ground-based device (1) measures the length of the transmission path
Implementation Method 2
measure the length of the transmission path from the ground-based facility (1) to the moving platform (5)
Implementation Method 3
the electrical measurement signal is modulated onto a free-space laser beam and transmitted optically
Implementation Method 4
transmitted optically parallel to the distance measurement section
Implementation Method 5
the device (2) is the source or receiving part for the (high-frequency) measurement or reference signal to be transmitted
Data Source
Figure 1
AI summary
The invention relates to a device comprising a device for measuring the length of a transmission path to a moving platform (5) and a device for transmitting complex measurement or reference signals, wherein at least components of the device for transmitting complex measurement or reference signals are arranged next to at least components of the device for measuring the length of the transmission path to a moving platform (5) in such a way that the changes in the length of the transmission path are always the same for both devices.