Receiver ICI Suppression via DMRS in Wireless Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-frequency wireless communication systems face challenges with inter-carrier interference (ICI) and increased signaling overhead, particularly in millimeter wave communication networks operating above 52.6 GHz, where beamforming and multiple transmission points complicate signal reception and processing.
Innovation Solution
A method for a receiving radio node that performs Inter Carrier Interference (ICI) suppression using Demodulation Reference Signaling (DMRS) based on received DMRS, employing a de-ICI filter determined from the DMRS, and avoiding additional Phase Tracking Reference Signal (PTRS) to reduce signaling overhead and improve high-frequency signal reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beamforming and multiple TRPs are used for high-frequency wireless communication, then communication bandwidth and capacity are improved, but inter-carrier interference and signal reception complexity increase
Solution Approach 1:
The patent applies preliminary action by performing ICI suppression on DMRS before data demodulation. The receiver first receives and processes DMRS to estimate and compensate for ICI effects, then uses the cleaned reference signal for accurate channel estimation and data demodulation. This preliminary ICI mitigation enables reliable high-frequency communication with beamforming and multiple TRPs.
2Measurement precision
If traditional reference signaling methods are used in millimeter wave communication, then channel estimation can be performed, but signaling overhead increases
Solution Approach 1:
The patent extracts and eliminates the need for separate PTRS by incorporating ICI suppression functionality directly into the DMRS processing. The receiver performs ICI suppression using only the DMRS that is already required for channel estimation, thereby achieving both ICI mitigation and channel estimation without adding extra reference signals, thus reducing signaling overhead.
Solution Approach 2:
The patent makes DMRS multi-functional by using it for both channel estimation and ICI suppression. The same DMRS reference signal serves dual purposes: estimating channel characteristics and compensating for inter-carrier interference. This eliminates the need for separate PTRS and reduces overall signaling overhead while maintaining measurement precision.
3Quantity of substance
If ICI suppression is performed using DMRS, then signaling overhead is reduced, but the complexity of signal processing increases
Solution Approach 1:
The patent applies self-service by having the DMRS serve its own processing needs for ICI suppression. The receiver uses the inherent structure and known sequence of the DMRS to estimate ICI effects and perform suppression without requiring additional external reference signals or complex auxiliary processing. The DMRS essentially suppresses ICI in itself, simplifying the overall system while reducing signaling overhead.
Data Source
AI summary
There is disclosed a method of operating a receiving radio node in a wireless communication network. The method includes receiving first signaling, the first signaling covering at least one allocation unit carrying Demodulation Reference Signaling, DMRS. Receiving includes performing Inter Carrier Interference, ICI, suppression for the at least one allocation unit carrying DMRS based on received DMRS. The disclosure also pertains to related devices and methods.