Multi-Antenna CSI Operations for Phase Stability and Lower Feedback
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Solution Overview
Problem
In communication systems with multiple receiving antennas, random phase fluctuations affect channel state information (CSI), leading to increased feedback overheads due to the need for CSI feedback from each antenna to select an optimal result, which is inefficient.
Innovation Solution
Perform division or conjugate multiplication operations on CSI from two receiving antennas to eliminate random phase fluctuations, reducing the need for full CSI feedback and minimizing reporting overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CSI from each receiving antenna is fed back to the base station for optimal result selection, then the sensing accuracy is improved, but the feedback overhead is greatly increased
Solution Approach 1:
The terminal performs division or conjugate multiplication operations on CSI from multiple receiving antennas before feedback to eliminate random phase fluctuations in advance. This preliminary processing reduces the dimensionality of the feedback data while preserving the essential sensing information, thereby reducing feedback overhead without sacrificing sensing accuracy.
Solution Approach 2:
The patent extracts only the necessary sensing information by performing operations that eliminate random phase fluctuations. Instead of feeding back all raw CSI data from each antenna, the terminal extracts the essential components needed for accurate sensing while discarding redundant phase information, thus reducing feedback overhead.
2Stability of the object's composition
If division or conjugate multiplication operations are performed on CSI from multiple receiving antennas, then the random phase fluctuation is eliminated, but the processing complexity increases
Solution Approach 1:
The patent changes the parameter representation of CSI by performing division or conjugate multiplication operations. This transforms the phase-unstable CSI into phase-stable results, eliminating random phase fluctuations while maintaining computational feasibility through standard mathematical operations.
3Reliability
If all CSI data from multiple antennas is reported, then the system can select optimal results, but the reporting overhead increases significantly
Solution Approach 1:
The terminal performs division or conjugate multiplication operations on CSI from multiple receiving antennas before feedback to eliminate random phase fluctuations in advance. This preliminary processing reduces the dimensionality of the feedback data while preserving the essential sensing information, thereby reducing feedback overhead without sacrificing sensing accuracy.
Data Source
AI summary
This application discloses an information transmission method and apparatus, and a communication device. The information transmission method in embodiments of this application includes: A first device measures a first signal to obtain a first result corresponding to each receiving unit. The receiving unit includes a receiving antenna or a receiving channel. The first signal includes at least one of a reference signal, a synchronization signal, a data signal, and a special signal. The first device sends a first message. The first message includes at least one first result satisfying a first condition or at least one second result satisfying a second condition. Each second result is obtained by performing target operation processing on first results corresponding to two receiving units. A target operation is a division operation or a conjugate multiplication operation.