Merging Pilot Signal Power Reporting in Four-Branch MIMO Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In four-branch multiple-input-multiple-output (MIMO) wireless communication systems, there is a need for a method to effectively inform user equipment (UE) of the power values of pilot signals transmitted by the base station, which are essential for channel estimation and data demodulation, but existing systems lack an efficient way to report these power values.
Innovation Solution
The base station uses multiple antennas to transmit multiple pilot signals and reports pilot signal power information to the UE, including power values for each pilot signal, allowing the UE to estimate channels and demodulate data using these power values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the base station transmits pilot signals on multiple antennas, then the channel estimation accuracy is improved, but the complexity of reporting power information increases
Solution Approach 1:
The patent combines the power information of multiple pilot signals (specifically the third and fourth antenna pilots) into a single reported value. Instead of reporting four separate power values for four antennas, the system reports a consolidated power value that represents multiple antennas, thereby reducing reporting complexity while maintaining the ability to perform accurate channel estimation for each antenna
Solution Approach 2:
The reported power information serves multiple functions: it enables channel estimation for multiple antennas, supports data demodulation, and provides a basis for calculating channel quality indicators. The consolidated power value acts as a universal reference that can be used across different antennas and processing stages
2Loss of information
If the base station reports separate power values for each pilot signal, then the information accuracy is improved, but the signaling overhead increases
Solution Approach 1:
The patent merges the power information of the third and fourth antenna pilot signals into a single reported value. This consolidation reduces the number of separate power indicators that need to be transmitted to the UE, thereby reducing signaling overhead while still providing sufficient information for accurate channel estimation and data demodulation across all four antennas
Data Source
AI summary
A base station (102), comprising a first antenna (111) for transmitting a first pilot signal; a second antenna (112) for transmitting a second a pilot signal; a third antenna (113) for transmitting a third pilot signal; and a fourth antenna (114) for transmitting a fourth pilot signal. The base station is configured to transmit pilot signal power information for indicating power values to a user equipment (104), UE, receiving the pilot signal power information. The pilot signal power information comprises: a first power value corresponding to the first pilot signal, a second power value corresponding to the second pilot signal, a third power value corresponding to the third pilot signal, and a fourth power value providing information regarding at least two demodulation pilot signals.