MIMO Antenna Pattern Control via Discrete Channel Matrix Estimation
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Solution Overview
Problem
Existing MIMO radio communication technologies require significant computation to determine and continuously adjust antenna patterns, leading to inefficient directional control and reduced channel capacity.
Innovation Solution
A MIMO radio communication apparatus and method that estimates a channel matrix and calculates channel capacity to optimize antenna patterns, reducing computational complexity and enabling adaptive directional control for improved channel capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If eigenvalues of channel matrix are calculated and antenna pattern is determined through computation, then adaptive antenna direction is obtained, but the amount of computation increases significantly
Solution Approach 1:
The patent segments the antenna pattern selection process into discrete patterns rather than continuous adjustment. Instead of computing continuous adaptive patterns through eigenvalue decomposition, the system pre-divides the antenna pattern space into multiple discrete patterns and selects from these segments, significantly reducing computational complexity while maintaining adaptability.
Solution Approach 2:
The patent performs preliminary action by pre-calculating and storing multiple discrete antenna patterns before actual communication begins. This allows the system to avoid complex real-time computation during data transmission, as the antenna pattern selection can be made from pre-computed options based on channel conditions.
2Productivity
If antenna pattern is controlled continuously to approach calculated channel matrix, then channel capacity increases, but device complexity and computation requirements increase
Solution Approach 1:
The patent segments the continuous antenna pattern adjustment into discrete pattern selection. By choosing from a finite set of pre-defined patterns rather than continuously adjusting the antenna direction, the system achieves sufficient channel capacity improvement without the computational burden of continuous optimization.
Solution Approach 2:
The patent changes the parameter of antenna pattern from continuous values to discrete, predetermined patterns. This parameter transformation allows the system to achieve adaptive directional control while reducing the complexity of computation required, as only discrete pattern indices need to be selected rather than optimizing continuous parameters.
Data Source
AI summary
A multi-input multi-output (MIMO) radio communication apparatus and method are provided. The MIMO apparatus includes a plurality of reception antennas each having a plurality of antenna patterns; a channel matrix estimation unit for estimating a channel matrix between a plurality of transmission antennas and the plurality of reception antennas; a channel capacity calculation unit for calculating a channel capacity corresponding to a combination of antenna patterns of the plurality of reception antennas by using the estimated channel matrix; and an antenna pattern control unit for changing the antenna patterns of the plurality of reception antennas to maximize the channel capacity. According to the MIMO radio communication apparatus and method, direction can be controlled adaptively to a propagation environment.