BRS to PBCH Power Ratio Determination for 5G UE
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Solution Overview
Problem
There is no method proposed for receiving and decoding beam reference signals (BRS) and physical broadcast channels (PBCH) in next-generation 5G wireless communication systems.
Innovation Solution
A method and device for user equipment (UE) to determine the power ratio of BRS to PBCH per resource element based on the number of BRS ports, detect BRS and demodulation reference signals, and decide whether to compensate the power ratio for channel estimation, allowing efficient decoding of PBCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power ratio of BRS to PBCH per resource element is determined based on the number of BRS ports, then the coverage problem is solved and PBCH can be decoded efficiently, but the device complexity increases due to the need to determine and compensate power ratios dynamically
Solution Approach 1:
The patent changes the power ratio parameter of BRS to PBCH per resource element based on the number of BRS ports. When the number of BRS ports is 2, the power ratio is set to 2; when the number of BRS ports is 4 or 8, the power ratio is set to 1. This parameter adjustment ensures that the total power consumed by BRS and PBCH remains constant while adapting to different beamforming configurations, thereby solving coverage problems and enabling efficient PBCH decoding without requiring complex dynamic adjustments.
2Reliability
If the number of BRS ports is increased to improve beamforming capability and coverage, then the system performance improves, but the power ratio compensation complexity increases
Solution Approach 1:
The patent establishes a direct relationship between the number of BRS ports and the power ratio parameter. By pre-defining the power ratio based on the detected number of BRS ports (2 ports → power ratio 2; 4 or 8 ports → power ratio 1), the system adapts to different beamforming capabilities without requiring complex real-time compensation calculations, thus maintaining simplicity while improving coverage.
3Measurement precision
If power ratio compensation is applied to channel estimated based on DMRS, then PBCH decoding accuracy improves, but the processing time and complexity increase
Solution Approach 1:
The patent performs power ratio determination in advance based on the detected number of BRS ports, before PBCH decoding. By pre-calculating the appropriate power ratio (2 or 1) and applying it to the channel estimate derived from DMRS, the system prepares the corrected channel information ahead of time, enabling accurate and efficient PBCH decoding without adding processing delays during the critical decoding phase.
Data Source
AI summary
A method for a terminal receiving a beam reference signal (BRS) and a physical broadcast channel (PBCH) in a wireless communication system can comprise the steps of: determining a power ratio of BRS to PBCH per resource element (RE) on the basis of the number of BRS ports; detecting the BRS and a demodulation reference signal (DMRS) on the basis of the number of the BRS ports; and determining whether or not the determined power ratio of BRS to PBCH is to be compensated to an estimated channel on the basis of the DMRS.