Digital Beam Forming Cross-Polarization Cancellation
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Solution Overview
Problem
Existing radio frequency communication systems face interference due to cross-polarized components, which are not adequately addressed by traditional digital beam forming techniques that prioritize co-polarized components, leading to compromised system performance.
Innovation Solution
An advanced digital beam forming technique that utilizes the relationship between co-polarized and cross-polarized components to increase co-polarized energy while suppressing cross-polarized components by applying electronic weightings and adaptive optimization loops, leveraging orthogonal polarized signal components to double the system's degrees of freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If digital beam forming techniques are used to maximize co-pol in-phase alignments, then co-pol signal strength is increased, but cross-pol interference is not adequately suppressed
Solution Approach 1:
The patent segments the beam forming process into two independent optimization loops: one for co-pol components and another for cross-pol components. This allows separate optimization of each polarization type without interference, enabling simultaneous maximization of co-pol signal strength and minimization of cross-pol interference through independent weight adjustment
Solution Approach 2:
The patent extends the traditional single-loop beam forming into a dual-loop optimization structure, adding another dimension to the optimization process. By creating separate optimization paths for co-pol and cross-pol components, the system can independently control each polarization type, effectively resolving the contradiction between signal strength and interference suppression
2Object-affected harmful factors
If additional constraint conditions are added to suppress cross-pol, then cross-pol mitigation performance is improved, but co-pol performance is degraded
Solution Approach 1:
The patent divides the optimization into separate segments for co-pol and cross-pol, allowing cross-pol mitigation to be achieved through a dedicated optimization loop that does not interfere with co-pol performance. Each loop optimizes its specific polarization type independently, preventing the degradation that would result from combined optimization constraints
3Adaptability or versatility
If both co-pol and cross-pol are optimized simultaneously, then both components are considered, but degrees of freedom are limited
Solution Approach 1:
The patent segments the optimization problem into two independent sub-problems, one for co-pol and one for cross-pol. This segmentation increases the effective degrees of freedom by allowing each polarization type to be optimized independently with its own set of weight coefficients, rather than constraining both simultaneously within a single limited optimization framework
Data Source
AI summary
An advanced digital beam forming technique is achieved that is capable of simultaneously forming multiple beams and attenuating the cross-pol component at multiple locations. The proposed invention, comprising a series of signal inputs, optimization loops and weighting processes, successfully eliminates the side effect of an increase of the cross-pol in the process of beam-forming, thus reducing potential interference. This technique utilizes the orthogonally polarized signal component which is already available and can minimize both the horizontally polarized and vertically polarized cross-pol at the same time. The complexity of computation can be reduced by using only part of the orthogonal polarized components in the optimization.