MU-MIMO Sub-Precoder Generation via Antenna Partitioning
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Solution Overview
Problem
MIMO systems face computational complexity due to the need for adaptive precoding in wireless communication networks, which requires channel state information and is challenging to optimize for multiple users simultaneously.
Innovation Solution
A method for generating sub-precoders using channel information from user equipment, allowing for joint transmit and receive optimization without complete channel knowledge, by partitioning antennae into subsets and using precoding matrix indicators for improved PMI reporting and precoder generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complete channel state information is used for adaptive precoding in MIMO systems, then data transmission quality is improved, but computational complexity increases significantly
Solution Approach 1:
The patent segments the channel information processing into two parts: full channel state information is used for initial precoder generation, while partial channel information (PMI) is used for iterative refinement. This segmentation allows the system to balance between using complete information for quality and reducing complexity through incremental updates using only partial information in subsequent iterations.
Solution Approach 2:
The patent applies partial action by using only partial channel information (precoding matrix indicators from feedback) for the iterative precoder refinement process. Instead of requiring complete channel state information for every iteration, the system uses partial information to progressively improve the precoder, thereby reducing computational complexity while maintaining transmission quality.
2Productivity
If adaptive precoding is implemented for multiple users simultaneously in MU-MIMO systems, then system capacity increases, but optimization difficulty increases
Solution Approach 1:
The patent implements self-service through iterative self-feedback mechanisms where each user equipment provides precoding matrix indicators that are used to refine the precoder for that user and subsequent users. The system uses the feedback from each user to automatically adjust and optimize precoding for multiple users without requiring centralized complex optimization, thereby increasing system capacity while managing optimization difficulty.
3Measurement precision
If channel information is collected from all user equipments for precoder generation, then precoding accuracy is improved, but feedback overhead increases
Solution Approach 1:
The patent uses partial channel information in the form of precoding matrix indicators (PMI) rather than complete channel state information. This partial information approach maintains sufficient precoding accuracy for iterative refinement while significantly reducing the feedback overhead that would be required to transmit full channel state information from all user equipments.
Data Source
AI summary
A method and system for data communication in a Multiple-Input and Multiple-Output (MIMO) system is provided. The method includes receiving, from a first UE, first channel information relating to a first subset of a plurality of antennae of the MIMO system and second channel information relating to a second subset of a plurality of antennae. The method further includes generating first and second sub-precoders according to the first and second channel information, respectively. A precoder is then generated according at least in part to the first sub-precoder and the second sub-precoder, and data is transmitted to the first UE using the precoder.