Beamforming Vector Calculation with Interference Degradation Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In broadband wireless communication systems, beamforming for interference cancellation often results in significant degradation of the target signal, leading to adverse effects on communication quality due to the correlation between target and interfering channel matrices.
Innovation Solution
A method is introduced to calculate a degradation factor indicating the signal power ratio when prioritizing interference cancellation, and a new noise power value is determined if the degradation factor exceeds a threshold, allowing for the calculation of an optimal beamforming vector that minimizes signal degradation, using a combination of Maximum Ratio Combining (MRC) and Minimum Mean Square Error (MMSE) beamforming vectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If beamforming for interference cancellation is performed, then interference from neighboring cells is reduced, but the target signal size significantly decreases
Solution Approach 1:
The patent changes the parameter of beamforming vector determination by introducing a degradation factor calculation that compares target channel matrix and interfering channel matrix. When the degradation factor exceeds a threshold, the system adjusts the beamforming approach to prevent excessive target signal degradation, thus resolving the contradiction between interference cancellation and target signal maintenance
Solution Approach 2:
The system dynamically adjusts the beamforming strategy based on real-time channel conditions. By calculating the degradation factor and comparing it with a threshold, the system switches between different beamforming approaches (normal beamforming vs. degradation-controlled beamforming), making the interference cancellation process adaptive rather than static
2Object-affected harmful factors
If beamforming vector prioritizes interference cancellation, then interfering signal size is decreased, but target signal degradation increases
Solution Approach 1:
The patent implements a feedback mechanism where the degradation factor is calculated based on the correlation between target channel matrix and interfering channel matrix. This feedback information is used to control the beamforming vector determination process, ensuring that target signal quality is maintained while still achieving interference cancellation when conditions permit
Data Source
AI summary
An apparatus and method for beamforming in a broadband wireless communication are provided. The apparatus includes a first calculator for determining a degradation factor to indicate a degradation degree of a target signal due to interference cancellation by using a target channel matrix and at least one interfering channel matrix, a second calculator for determining a new noise power value to be used to calculate a beamforming vector if the degradation factor is greater than or equal to a threshold, and for determining the beamforming vector by using the new noise power value, and a beamformer for performing beamforming on a signal transmitted/received with a target Mobile Station (MS) by using the beamforming vector.