Uplink Precoder Resource Bundling for MIMO Channel Measurement
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Solution Overview
Problem
Current wireless communication systems, such as 3GPP LTE, face challenges in efficiently managing uplink reference signals and achieving flexible frequency band use, cost reduction, and power efficiency, particularly in MIMO transmission schemes.
Innovation Solution
The implementation of a precoder based on resource bundling in the wireless communication system, specifically for uplink reference signal transmission, allows for efficient beam cycling and precoder configuration across time-frequency resource units, enhancing channel measurement and data transmission in both open-loop and closed-loop MIMO schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional uplink reference signal transmission is used without resource bundling, then each reference signal can be transmitted independently, but the control channel overhead increases and system complexity increases
Solution Approach 1:
The patent applies resource bundling to combine multiple uplink reference signals into a single resource unit. Instead of transmitting and controlling each reference signal independently, the system bundles them together and applies a single precoder configuration to the entire bundle, thereby reducing control channel overhead and system complexity while maintaining reference signal transmission functionality
2Measurement precision
If multiple precoders are applied to different uplink reference signals, then beam cycling and channel measurement improve, but the complexity of precoder configuration increases
Solution Approach 1:
The patent segments the uplink reference signals into resource bundles while maintaining the ability to apply different precoders to different bundles. This segmentation allows the system to manage precoder configurations in a structured manner, where each bundle can have its own precoder applied, but the overall configuration is simplified through the bundling structure
Solution Approach 2:
The patent enables dynamic precoder configuration where the same precoder can be applied to different resource bundles at different times. This dynamic approach allows beam cycling and channel measurement improvements while reducing configuration complexity through time-sharing of precoder applications across bundled reference signals
Data Source
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AI summary
Disclosed is a method for transmitting an uplink signal by a terminal in a wireless communication system. The method comprises the steps of: transmitting multiple precoded reference signals, to each of which a precoder cyclic pattern is applied in a predetermined resource unit, to a base station; receiving, from the base station, information indicating one among the multiple precoded reference signals; and transmitting an uplink data signal and an uplink demodulation reference signal to the base station by using a precoder cyclic pattern which has been applied to the indicated precoded reference signal.