Fast Cross-Pole Corrector for Dual-Polarized Antenna Signal Alignment
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Solution Overview
Problem
Existing systems fail to efficiently determine and correct the angle of polarization for received composite signals with both horizontal and vertical polarization components using dual linear-polarized receive antennas, as most target signals have a linear polarization neither vertical nor horizontal to the antenna, leading to suboptimal signal reception.
Innovation Solution
A system and method that involves receiving time series signals from both vertical and horizontal outputs, applying them to a spectrum domain converter, detecting the angle of rotation, and using this angle in a polarization rotation correction block to yield polarization-corrected frequency and time data, employing fast Fourier Transform and histogram analysis for near real-time correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional polarization correction methods are used, then polarization angle can be determined, but the correction process is slow and not suitable for real-time applications
Solution Approach 1:
The patent divides the polarization correction process into distinct functional blocks: angle detection block that processes histogram data to find peak angles, and polarization rotation correction blocks that apply correction to time-domain and frequency-domain signals separately. This segmentation allows parallel processing paths that improve speed while maintaining accuracy through specialized processing in each block.
Solution Approach 2:
The patent applies polarization correction to both time-domain and frequency-domain signals simultaneously, performing more corrections than traditionally necessary. This partial or excessive action ensures that corrections are applied at multiple stages of signal processing, guaranteeing real-time performance and accuracy without requiring complex adaptive algorithms.
2Adaptability or versatility
If dual linear-polarized antennas are used to receive signals, then both vertical and horizontal polarization components can be captured, but the system cannot efficiently determine the actual polarization angle of target signals
Solution Approach 1:
The patent introduces histogram analysis as an intermediary processing step between signal reception and polarization angle determination. The angle detection block creates histograms from the received signals and uses peak detection to identify the polarization angle. This intermediary approach simplifies the detection process by transforming complex signal analysis into a straightforward histogram peak-finding operation.
Solution Approach 2:
The patent replaces complex mechanical or iterative polarization detection methods with direct computational analysis using histogram processing and Fast Fourier Transform. Instead of mechanical adjustment or iterative optimization, the system uses mathematical transformation and statistical analysis to directly determine the polarization angle from the received dual-polarized signals.
3Reliability
If polarization correction is applied in real-time, then signal reception quality improves, but the processing complexity and computational load increase
Solution Approach 1:
The patent implements periodic polarization correction by continuously updating the polarization angle through histogram analysis of incoming signals and applying corrections at regular intervals. The system processes signals in periodic batches, performing Fast Fourier Transform and histogram analysis on signal frames, which reduces computational complexity compared to continuous real-time processing while maintaining signal quality through frequent updates.
Solution Approach 2:
The patent performs preliminary polarization angle determination using histogram analysis before applying the actual polarization correction to the main signal processing pipeline. By pre-determining the correction angle from histogram peak detection, the system avoids complex real-time calculations during signal correction, reducing processing complexity while ensuring accurate real-time correction application.
Data Source
AI summary
A system for correcting for an angle of rotation between a linearly polarized target signal and a dual-polarized antenna having vertical and horizontal outputs includes receiving a time series of signals from the vertical and horizontal outputs of the receive antenna, applying the vertical signals simultaneously to a data buffer and to a spectrum domain converter block to yield, respectively, spectral Xv(n) and Xv(k) signals, applying the horizontal signals simultaneously to a data buffer and to a spectrum domain converter block to yield, respectively, spectral Xh(n) and Xh(k) signals, detecting the angle of rotation, applying the angle of rotation and the Xv(k) and Xh(k) signals to a polarization rotation correction block to obtain polarization corrected frequency data, and applying the detected angle of rotation and the Xv(n) and Xh(n) signals to a polarization rotation correction block to obtain polarization corrected time data.