Radio Wave Geometric Structure Reconstruction With OAM Basis Expansion
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Solution Overview
Problem
Existing radio wave analysis methods for communication, radar imaging, and object detection/recognition are limited in information representation capability due to the use of orthogonal bases with restricted freedom, leading to suboptimal communication capacity and object detection resolution.
Innovation Solution
A radio wave analysis apparatus that utilizes orthogonal basis components, including polarization and orbital angular momentum components, to reconstruct geometric structures on a spherical surface, allowing for increased information representation and enhanced communication capacity or object detection resolution through high-degree freedom combinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If orthogonal basis expansion with limited freedom is used, then the analysis method is simple, but the information representation capability is limited
Solution Approach 1:
The patent transitions from traditional 2D polarization basis representation to a 3D spherical surface representation by introducing the third orthogonal basis component. This dimensional expansion allows the system to represent radio wave characteristics in three-dimensional space (elevation angle, azimuth angle, and radius) rather than limited to two dimensions, thereby increasing information representation capability while maintaining analytical feasibility
Solution Approach 2:
The patent combines multiple orthogonal basis components (first, second, and third bases) to form a composite representation system. By superimposing these orthogonal bases and representing them as poles on a spherical surface, the system creates a composite information structure that captures more comprehensive radio wave characteristics than any single basis could provide alone
2Ease of operation
If traditional polarization observation is used, then the measurement process is simple, but the object detection resolution is limited
Solution Approach 1:
The patent extends traditional 2D polarization observation to 3D spherical surface representation by incorporating elevation angle, azimuth angle, and radius parameters. This dimensional transition enables the system to detect and represent spatial characteristics of radio waves in three-dimensional space, significantly improving object detection resolution while building upon familiar polarization observation concepts
3Productivity
If two orthogonal bases are used, then the analysis is computationally efficient, but the communication capacity is suboptimal
Solution Approach 1:
The patent introduces a third orthogonal basis component to the traditional two-basis system, expanding the representation space from 2D to 3D on a spherical surface. This additional dimension provides more degrees of freedom for information encoding, enabling higher communication capacity through increased modulation possibilities while maintaining computational tractability through systematic reconstruction algorithms
Data Source
AI summary
A radio wave analysis apparatus analyzes a radio wave having a geometric structure, and includes: a radio signal acquisition section that acquires, as a reception radio signal, a complex signal of a reception electric field of each of elements of an array antenna; an orthogonal basis expansion section that calculates orthogonal basis components including an orbital angular momentum component from the reception radio signal; a reference structure acquisition section that acquires reference structure information for identifying components of the radio wave corresponding to first and second orthogonal bases, respectively, used in modulation of the radio wave through a geometric structure; and a reconstruction computation section that uses the orthogonal basis components and the reference structure information to compute, as a reconstructed geometric structure, an elevation angle, an azimuth angle, and a radius on a spherical surface having the first and second orthogonal bases as poles.