Dynamic Precoding Matrix for MIMO Polarization Interference
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Solution Overview
Problem
Conventional MIMO systems do not effectively change the precoding matrix to account for polarization, leading to potential interference between signals transmitted from different antennas, which can degrade data reception quality.
Innovation Solution
A method is introduced where the precoding matrix is calculated and adjusted based on feedback information to ensure that signals transmitted from horizontal and vertical polarized antennas minimize interference, using equations to determine optimal values for θ, a, and b to satisfy specific conditional equations, thereby improving signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed precoding matrix is used in MIMO transmission, then the device complexity is reduced, but signal interference increases and reception quality deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed precoding matrix to a dynamic precoding matrix that changes based on channel conditions. The base station calculates the precoding matrix adaptively using feedback information from the terminal about channel state, polarization information, and rank values, allowing the system to optimize signal transmission in real-time while managing complexity through structured calculation methods.
Solution Approach 2:
The patent implements parameter changes by incorporating polarization information as an additional dimension for precoding matrix determination. Instead of relying solely on traditional channel state parameters, the system now considers polarization characteristics (horizontal/vertical) along with rank values and feedback information, enabling more precise signal separation and interference reduction through multi-parameter optimization.
2Reliability
If polarization surfaces are switched for specified antennas only, then the implementation complexity is reduced, but the channel matrix quality improvement is limited
Solution Approach 1:
The patent applies universality by creating a unified precoding framework that simultaneously handles both polarization switching and signal transmission optimization. The precoding matrix calculation method integrates multiple functions including polarization management, channel adaptation, and signal weighting into a single cohesive process, eliminating the need for separate polarization switching control mechanisms.
Data Source
AI summary
A first transmission signal and a second transmission signal are generated from a first modulated signal and a second modulated signal by using a precoding matrix, and parameters of the precoding matrix are calculated from feedback information.