Wireless Channel State Reporting with Precoded Artificial Noise
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing channel state information reporting, particularly in environments with interference and varying signal conditions, which affect data transmission quality and network performance.
Innovation Solution
The implementation of artificial noise injection techniques, where unprecoded reference signals are used to report beam information and precoded data signals are transmitted based on this information, enhancing the accuracy and reliability of channel state information reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional channel state information reporting is used in wireless communication systems, then the system can maintain basic communication functionality, but the accuracy and reliability of channel state information reporting deteriorates in environments with interference and varying signal conditions
Solution Approach 1:
The patent applies artificial noise injection to convert the harmful effect of interference into a beneficial mechanism. By intentionally injecting controlled noise signals into the channel state information reporting process, the system creates artificial interference patterns that help distinguish actual channel conditions from random interference, thereby improving measurement precision in noisy environments
Solution Approach 2:
The patent changes the parameters of the reference signals by applying artificial noise with specific statistical properties and spatial distributions. By modifying the noise characteristics (power levels, correlation structures, spatial directions), the system adapts the channel state information reporting to varying signal conditions, improving accuracy without requiring complete system redesign
2Measurement precision
If artificial noise injection is implemented to improve channel state information reporting accuracy, then measurement precision improves, but device complexity increases due to additional processing requirements
Solution Approach 1:
The patent segments the channel state information reporting process into distinct components: reference signal transmission, artificial noise injection, beam information extraction, and feedback reporting. By dividing the complex process into manageable segments, each handling a specific function, the system improves measurement precision while keeping individual processing stages relatively simple and modular
Solution Approach 2:
The patent performs preliminary action by pre-calculating and pre-injecting artificial noise into the reference signals before actual channel state information measurement. This advance preparation allows the receiving end to focus computational resources on extracting beam information from already-noised signals, rather than having to generate and manage noise in real-time, thereby reducing overall processing complexity
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may receive an unprecoded reference signal. The network node may report, based on the unprecoded reference signal, beam information associated with artificial noise (AN). The network node may receive one or more data signals protected by one or more precoded AN signals, wherein the one or more precoded AN signals are based on the beam information. Numerous other aspects are described.