Angular Error Detection Using Pilot Signal Phase Correction
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Solution Overview
Problem
Existing angular error detection methods in tracking receiving systems are hindered by phase differences in signal paths caused by varying cable lengths and temperatures, leading to inaccurate calculations when the calculating machine is not near the antenna.
Innovation Solution
An angular error detecting device that superimposes pilot signals on sum and difference signals, detects phase differences in these signals, and corrects the signals accordingly to maintain accurate angular error detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the calculating machine is arranged far from the antenna, then the system flexibility and ease of installation are improved, but phase differences in signal paths cause measurement precision to deteriorate
Solution Approach 1:
The patent introduces pilot signals as intermediary elements that travel through the signal paths alongside the sum and difference signals. These pilot signals serve as references to measure and detect phase differences caused by cable length variations and temperature changes, enabling correction of the angular error without requiring the calculating machine to be physically close to the antenna.
Solution Approach 2:
The patent implements a feedback mechanism where the phase differences detected from pilot signals are used to correct the angular error calculation. The detected phase information feeds back into the calculation process to compensate for signal path discrepancies, maintaining measurement precision even when the calculating machine is remotely located.
2Device complexity
If signal paths are not strictly aligned, then device complexity and installation flexibility are improved, but phase differences block accurate angular error calculation
Solution Approach 1:
Pilot signals act as intermediary references that enable the system to tolerate signal path misalignment. By comparing the phase of pilot signals transmitted through different paths, the system can detect and compensate for path differences without requiring strict physical alignment, thus reducing installation complexity while maintaining accuracy.
Solution Approach 2:
The patent changes the parameter approach by introducing additional pilot signals with known phases. This allows the system to measure and correct phase differences dynamically, transforming the problem from requiring fixed physical alignment to allowing flexible installation while maintaining calculation accuracy through parameter-based correction.
Data Source
AI summary
An angular error detecting device detects an angular error in a receiving direction of a frequency signal from a tracking target with respect to a front direction of an antenna based on a phase difference of a first reception signal received at a first receiving unit of the antenna and a second reception signal received at a second receiving unit having a receiving position in the antenna different from a receiving position of the first receiving unit. The angular error detecting device includes a reception signal output unit, a pilot signal supply unit, a pilot phase difference detection unit, a correction unit, and an angular error detection unit. The angular error detection unit detects the angular error based on the one side corrected at the correction unit and the other side that is not corrected of the sum signal and the difference signal.