MU-MIMO Steering Matrix Computation for Extended Antenna Configurations
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Solution Overview
Problem
Existing MU-MIMO transmission algorithms are limited in supporting configurations where the number of receive antennas exceeds the number of transmit antennas, leading to suboptimal performance and the need for antenna reduction or interference cancellation protocols.
Innovation Solution
A method for computing a steering matrix that involves channel inversion and singular value decomposition to optimize MU-MIMO transmission, allowing for more receive antennas than transmit antennas without requiring antenna reduction or interference cancellation protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing MU-MIMO transmission algorithms are used, then the system can operate with standard antenna configurations, but the performance is suboptimal when the number of receive antennas exceeds the number of transmit antennas
Solution Approach 1:
The patent changes the mathematical parameters of the steering matrix computation by incorporating channel inversion and singular value decomposition. This allows the system to handle cases where the number of receive antennas exceeds transmit antennas, transforming the system from being limited to standard configurations to supporting extended configurations with improved performance.
2Adaptability or versatility
If antenna reduction protocols are used to handle configurations with more receive than transmit antennas, then the system can operate in such configurations, but hardware resources are underutilized
Solution Approach 1:
The patent extracts the limitation of existing algorithms that require antenna reduction. By removing this constraint through advanced mathematical computation (channel inversion and SVD), the system can utilize all available receive antennas effectively, preventing hardware resources from being underutilized while maintaining configuration adaptability.
3Adaptability or versatility
If interference cancellation protocols are used to handle configurations with more receive than transmit antennas, then the system can operate in such configurations, but the device complexity increases
Solution Approach 1:
The patent replaces complex interference cancellation protocols with a mathematical computation approach using channel inversion and singular value decomposition. This substitution maintains the ability to handle extended antenna configurations while reducing protocol complexity, as the mathematical framework naturally manages interference without requiring additional complex cancellation mechanisms.
Data Source
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AI summary
It is provided a method 10 for obtaining a steering matrix Q to be applied for MU-MIMO transmission of data for a MU-MIMO communication system 20 which comprises at least a transmitter 200 comprising at least NTX = 2 transmit antennas 201, 202 and K = 2 receivers 230, 240, with each dth receiver comprising NRX(d) receive antennas 231, 232 or 241, 242, respectively, wherein ∑d NRX(d) ≥ NTX. The method is implemented at the level of the transmitter 200. The obtained steering matrix Q to be applied for DL-MU-MIMO transmission allows of supporting extended configurations of a DL-MU-MIMO communication system 20 and allows of improving significantly the quality of subsequent DL-MU-MIMO transmissions, when the number of receive antennas ∑d NRX(d) is larger than the number NTX of transmit antennas.