A method for extracting direction finding correction parameters for multi-antenna base station
By calculating and correcting the phase difference zero deviation and geometric distortion errors in direction finding of multi-antenna base stations, the problem of low direction finding accuracy and inability to achieve 360-degree full circumferential direction finding is solved, and high-precision 360-degree direction finding is achieved.
Patent Information
- Application Number
- CN202110586529.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-05-27
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2041-05-27
AI Technical Summary
In the multi-antenna direction finding method based on the arrival phase difference, there is zero deviation of the phase difference and the antenna geometric distortion error, resulting in a reduced direction finding accuracy and the 360-degree full-circumferential direction finding cannot be achieved.
By collecting the received phase difference data of each pair of antennas on the direction finding plane of multiple angles in the direction finding plane of the multi-antenna base station, the phase difference zero deviation parameters and internal angle parameters are calculated, the impact of phase difference zero deviation and geometric layout structure on direction finding, the direction angle data is calculated, and whether the monotonic conditions are met are met to determine the success or failure of the direction finding correction parameter extraction.
It effectively reduces the impact of phase difference zero deviation and geometric distortion error, improves direction finding accuracy, and achieves 360-degree full-circumferential direction finding.