Uplink Receive Beamformer Calculation Complexity Reduction
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Solution Overview
Problem
Uplink receive beamformer calculations in 5G communication systems are computationally demanding, requiring methods to reduce complexity while maintaining accuracy.
Innovation Solution
The method involves using demodulation reference signal (DMRS)-based beamformer calculations, where instead of calculating beamformers for every resource element, a consolidated number of DMRS-based beamformers are calculated for an influence region, significantly reducing complexity and improving accuracy by using DMRS anchors and interpolating channel estimates across resource elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beamformers are calculated for every resource element, then accuracy is improved, but computational complexity increases significantly
Solution Approach 1:
The patent divides the resource elements into groups and selects specific anchor points (DMRS anchors) within each group. Instead of calculating beamformers for all resource elements, calculations are performed only at these anchor points, and the results are then applied to the entire group through association rules, thereby reducing computational complexity while maintaining accuracy.
Solution Approach 2:
The patent calculates beamformers at selected DMRS anchor resource elements and then copies/assigns these calculated beamformers to other resource elements within the same influence region. This copying approach avoids redundant calculations while preserving the beamforming accuracy across all resource elements.
2Productivity
If beamformer calculation complexity is reduced, then processing efficiency is improved, but accuracy may deteriorate
Solution Approach 1:
The patent applies different processing strategies to different resource elements based on their local characteristics. DMRS anchor resource elements receive full beamformer calculations, while other resource elements within the same influence region use the associated beamformers from anchors. This local differentiation maintains accuracy where needed while improving overall efficiency.
Solution Approach 2:
The patent performs beamformer calculations in advance at strategically selected DMRS anchor positions before needing to process all resource elements. These preliminary calculations at anchor points enable efficient subsequent processing of the entire resource element set through association, improving overall processing efficiency without sacrificing accuracy.
Data Source
AI summary
Methods, systems, and apparatuses for calculating and using uplink receive beamformers in wireless devices. In a demodulation reference signal (DMRS)-based beamformer calculation scheme, the computational complexity might be overwhelmingly high if a unique beamformer is calculated for each and every single resource element (RE). There may be combinations via frequency, time, or other means across resource block groups (RBGs) to consolidate the number of beamformers to be calculated.