Channel Measurement Method Reducing Resource Overheads
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Solution Overview
Problem
In communication systems, especially those with a large quantity of antennas, the resource overheads for channel measurement are high due to the need to estimate multiple ports, which reduces resources available for data transmission and decreases frequency efficiency and throughput.
Innovation Solution
A channel measurement method that reduces the number of ports required for measurement by using K signals to determine channel state information corresponding to R ports, where R is greater than K, allowing for a decrease in the number of signals and resources needed for channel measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the quantity of ports is increased to support a large quantity of physical antennas, then the channel measurement capability is improved, but the resource overheads for channel measurement increase
Solution Approach 1:
The patent segments the R ports into two groups: K ports that are directly measured using reference signals, and R-K ports that are inferred through linear combination. This segmentation allows the system to measure only a subset of ports directly while deriving the remaining port information through mathematical relationships, thereby reducing the number of reference signals needed while maintaining complete channel state information for all R ports
Solution Approach 2:
The patent introduces linear combination coefficients as an intermediary mechanism. These coefficients enable the transformation of measurements from K ports to channel state information for R ports through mathematical linear combination, serving as a mediator that bridges the gap between reduced measurements and complete channel information
2Measurement precision
If the quantity of ports is increased to support a large quantity of physical antennas, then the channel measurement capability is improved, but the proportion of resources available for data transmission decreases
Solution Approach 1:
The patent segments the port measurement process into direct measurement of K ports and inferred measurement of R-K ports through linear combination. This segmentation reduces the number of reference signal resources required, thereby increasing the proportion of time-frequency resources available for data transmission while maintaining the ability to obtain channel state information for all R ports
Solution Approach 2:
The patent applies partial action by measuring only K ports (where K < R) directly through reference signals, rather than measuring all R ports. The remaining port information is obtained through linear combination of the measured ports, which reduces the measurement overhead while still providing complete channel state information needed for data transmission
Data Source
AI summary
Embodiments of this application provide a channel measurement method and a communication apparatus. The method includes: A first apparatus receives K signals, where the K signals correspond to K ports. The first apparatus measures the K signals to obtain measurement results, where the measurement results are used to determine channel state information corresponding to R ports, R is greater than K, and K is greater than or equal to 1. According to solutions provided in embodiments of this application, resource overheads for channel measurement can be reduced.