Beamforming Feedback Compression for Mixed Precoder Transmission
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Solution Overview
Problem
Existing beamforming technologies face challenges in efficiently reducing the size of feedback messages while maintaining transmission performance, particularly in mixed beamforming scenarios, due to predefined parameters that fail to optimize the trade-off between feedback size and performance.
Innovation Solution
An apparatus and method for computing a feedback message that selectively compresses narrowband precoder feedback messages using different compression processes for selected and non-selected data elements, allowing for real-time adjustment to changing link conditions, thereby reducing the feedback size without significant performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If narrowband precoder feedback messages are compressed using a single compression process, then the feedback size is reduced, but the transmission performance degrades significantly
Solution Approach 1:
The patent applies different compression processes to different data elements within the feedback message based on their importance. Specifically, it identifies and compresses less significant data elements (such as certain rows of the precoder matrix) using aggressive compression while preserving more critical elements with minimal or no compression, thereby achieving overall size reduction while maintaining transmission performance
Solution Approach 2:
The feedback message is segmented into different data elements that can be processed independently. The patent divides the precoder feedback into multiple rows or elements, evaluates their individual importance, and applies selective compression to specific segments rather than uniformly compressing the entire message, resolving the contradiction between size reduction and performance maintenance
2Ease of manufacture
If predefined parameters are used for compression, then the implementation is simple, but the trade-off between feedback size and performance cannot be optimized
Solution Approach 1:
The patent introduces dynamic adaptation by evaluating the importance of different data elements based on current channel conditions and link quality. Rather than using fixed predefined parameters, the system dynamically determines which elements to compress and which to preserve, allowing optimization to adapt to changing wireless conditions while maintaining reasonable implementation complexity through structured evaluation criteria
Data Source
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AI summary
There is provided an apparatus for computation of a feedback message to a beamforming device, comprising: a processor configured to: receive narrowband precoder feedback messages computed based on a calibration message transmitted by the beamforming device, the calibration message is analyzed to compute a parameter of a wideband precoder feedback message for a transmission bandwidth, and the narrowband precoder feedback messages are computed according to the parameter of the wideband precoder feedback message, select data element (s) from the narrowband precoder feedback messages for compression thereof using a first compression process that is different than a second compression process used for compression of non-selected data elements, generate compressed narrowband precoder feedback messages by compressing the selected data element (s) with the first compression process and compressing non-selected data elements with the second compression process, and provide the compressed narrowband precoder and the wideband precoder feedback message for transmission to the beamforming device.