Error analysis method for direction of arrival estimation based on active reconfigurable intelligent metasurface
By constructing a signal model and covariance matrix of an active reconfigurable smart metasurface, and combining it with a spatial spectrum estimation algorithm, the influence of active amplifiers on direction of arrival estimation is analyzed. This solves the error problem introduced by active amplifiers, improves estimation accuracy, and provides support for subsequent error compensation and robust estimation algorithms.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
- Filing Date
- 2026-03-04
- Publication Date
- 2026-07-17
AI Technical Summary
In the prior art, the introduction of active amplifiers in active reconfigurable smart metasurfaces can introduce errors into the direction of arrival estimation, affecting the estimation accuracy. Furthermore, existing research has not considered the error caused by active amplifiers.
A signal model based on an active reconfigurable smart metasurface is constructed. The received signal is transmitted to the signal model, and the corresponding output signal is output. The covariance matrix is constructed, and feature analysis is performed based on the spatial spectrum estimation algorithm to obtain the direction of arrival estimate. The influence of the active amplifier on the direction of arrival estimate is analyzed.
Error performance analysis of the direction of arrival estimation of an active amplifier in an active reconfigurable smart metasurface was achieved, laying the foundation for subsequent error compensation schemes and robust direction of arrival estimation algorithms, and improving the estimation accuracy.
Smart Images
Figure CN122410431A_ABST