Uplink Beamforming Channel Estimation via Eavesdropping
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Solution Overview
Problem
Existing wireless communication systems require significant bandwidth and capacity for channel estimation and updating, especially in mobile networks, due to frequent changes in transmission channels, which reduces system efficiency.
Innovation Solution
A method where a terminal eavesdrops beamformed signals intended for other devices, measures signal quality, and uses this information to estimate and update uplink channel information, allowing for more efficient channel estimation and reduced bandwidth usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated signaling overhead is used for channel estimation, then channel estimation accuracy is improved, but system capacity is reduced
Solution Approach 1:
The patent makes downlink beamformed signals serve dual purposes: delivering data to intended terminals and providing channel estimation information to other terminals. This multi-functionality eliminates the need for separate dedicated pilot signals, thereby improving system capacity while maintaining channel estimation accuracy.
Solution Approach 2:
Terminals perform self-service channel estimation by eavesdropping on downlink beamformed signals intended for other terminals. Instead of requiring dedicated signaling overhead from the base station, terminals autonomously extract channel information from existing signals, reducing system capacity consumption while maintaining estimation accuracy.
2Measurement precision
If channel estimation is performed frequently in mobile networks, then channel estimation accuracy is improved, but bandwidth consumption is increased
Solution Approach 1:
The patent enables downlink beamformed signals to simultaneously serve data transmission and channel estimation functions. This allows terminals to perform frequent channel estimations without requiring additional dedicated bandwidth for pilot signals, thus maintaining estimation accuracy while reducing overall bandwidth consumption.
Solution Approach 2:
Terminals autonomously perform channel estimation by utilizing existing downlink beamformed signals from other terminals. This self-service approach eliminates the need for separate bandwidth allocation for channel estimation, allowing frequent updates without increasing total bandwidth consumption.
Data Source
AI summary
A method of aiding uplink transmission is disclosed. One method includes a base station downlink transmitting signals to at least a first terminal, the transmitted signals directed and conveying data to at least the first terminal. The method further includes a second terminal eavesdropping the transmitted signals, and measuring a signal quality. The second terminal estimates uplink channel information based on the measured signal quality, for aiding uplink transmission. Based at least in part on the estimated transmission channel, the second terminal transmits uplink signals to the base station.