Virtual Array Antenna Power Estimation for Shared-Band Signals
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Solution Overview
Problem
Existing communication systems face inefficiencies in estimating power values for multiple signal sources sharing the same band, as they require stopping system operations and using complex, costly array antenna structures to measure interference and signal sources sequentially.
Innovation Solution
A method using a mobile antenna to form a virtual array antenna structure, moving along a linear or circular path, and applying an approximation singular value decomposition (SVD) algorithm to generate a 2D data set for power estimation, allowing for simultaneous power estimation of signal sources without the need for multiple antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed array antenna structure with multiple antennas is used to simultaneously estimate power values of multiple signal sources, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent employs a mobile antenna that moves along a predetermined path instead of using a fixed array of multiple antennas. By dynamically changing the antenna position over time, the system creates a virtual array antenna effect, achieving the same measurement capability as a complex fixed array structure with simpler hardware
Solution Approach 2:
The mobile antenna system creates a virtual copy of the array antenna structure through movement. Instead of physically deploying multiple antennas simultaneously, the single antenna replicates the spatial sampling function of an array by visiting equivalent positions sequentially, reducing hardware complexity while maintaining measurement precision
2Measurement precision
If a mobile antenna moves at low speed to capture sufficient signal variations, then measurement precision is improved, but productivity decreases due to longer measurement time
Solution Approach 1:
The system compensates for low mobile antenna speed by adjusting algorithmic parameters in the approximation SVD process. By modifying the mathematical processing parameters to account for limited signal variation, the system achieves accurate power estimation even when the antenna moves slowly, thus maintaining measurement precision without requiring high movement speed
3Measurement precision
If sequential power estimation is performed by stopping system operation, then measurement precision is improved by eliminating interference, but productivity decreases due to system downtime
Solution Approach 1:
The patent enables continuous power estimation during normal system operation by using the mobile antenna to capture signal characteristics in real-time. The approximation SVD algorithm processes the collected data to separate signal components from interference, allowing the communication system to maintain operational continuity while achieving accurate power measurement without sequential stopping
Data Source
AI summary
An operating method of a power estimation apparatus comprising a fixed antenna and a mobile antenna may comprise: a first operation of obtaining N measurement values by receiving a signal from signal sources using the fixed antenna and the mobile antenna that moves at a speed v from a first point to an Nth point; a second operation of generating a two-dimensional (2D) data collection set comprising N×M measurement values, by repeating the first operation M times; applying an approximation singular value decomposition (SVD) algorithm to the 2D data collection set; and obtaining information of the signal sources based on an application result of the approximation SVD algorithm, wherein N and M are natural numbers.