Downlink Signal Demodulation Using Indicated Resource Block Groups
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Solution Overview
Problem
The high processing complexity and signaling overheads in demodulating signals in wireless communication systems due to interference from multiple antenna ports in MIMO technology, particularly in 5G NR systems, result from the need to perform blind detection on all DMRS ports, leading to inefficient interference suppression.
Innovation Solution
A method where a network device indicates specific resource block groups to a terminal, distinguishing between those carrying the desired signal and those with interfering signals, allowing the terminal to focus demodulation efforts only on the indicated groups, thereby reducing the need for comprehensive blind detection and signaling overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind detection is performed on all DMRS ports to suppress interfering signals, then interference suppression capability is improved, but terminal processing complexity increases significantly
Solution Approach 1:
The patent segments the resource block groups into two categories: those containing interfering signals and those without. The network device indicates only the resource block groups containing interfering signals through indication information. The terminal then performs interference suppression processing only on the indicated resource block groups, rather than blindly detecting all DMRS ports across all resource block groups. This segmentation approach maintains interference suppression capability while significantly reducing terminal processing complexity.
2Measurement precision
If comprehensive blind detection on all resource block groups is performed, then signal demodulation accuracy is improved, but signaling overheads increase
Solution Approach 1:
The patent extracts and indicates only the specific resource block groups that contain interfering signals, rather than providing information about all resource block groups. The network device generates indication information that identifies only the resource block groups requiring interference suppression processing. This extraction approach reduces signaling overheads by transmitting only necessary information while maintaining signal demodulation accuracy through targeted processing on the indicated resource block groups.
Data Source
AI summary
A signal processing method includes receiving, by a terminal, first indication information and second indication information. The first indication information indicates at least one first resource block group. The second indication information indicates a second resource block group. The second resource block group belongs to the at least one first resource block group. The signal processing method also includes receiving, by the terminal, a downlink signal on the at least one first resource block group. The signal processing method further includes processing the downlink signal based on the second indication information.