Frequency-Domain Nonlinearity Compensation Using Dual Reference Signals
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Solution Overview
Problem
The non-linearity of signals transmitted and received between terminals and base stations in wireless communication systems causes interference and deteriorates data reception performance, particularly in ultra-high frequency bands like THz, necessitating methods to acquire and compensate for non-linearity information.
Innovation Solution
A method and apparatus for acquiring non-linearity information of interference signals in the frequency domain using reference signals, enabling non-linearity compensation (NC) by processing first and second RS-related information to improve signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-linearity compensation is performed using traditional methods, then data reception performance improves, but the method cannot accurately acquire non-linearity information of interference signals in the frequency domain
Solution Approach 1:
The patent segments the non-linearity information acquisition process into multiple components by introducing separate reference signals for the first terminal and second terminal. This allows independent estimation of non-linearity parameters for each terminal's signal, enabling accurate frequency-domain non-linearity information acquisition while maintaining data reception performance.
Solution Approach 2:
The patent introduces reference signals as intermediary elements to facilitate non-linearity measurement. These reference signals serve as mediators between the transmitted signals and the non-linearity compensation mechanism, enabling accurate acquisition of non-linearity information in the frequency domain without directly processing the data signals themselves.
2Measurement precision
If reference signals are added to acquire non-linearity information, then non-linearity compensation accuracy improves, but system complexity increases
Solution Approach 1:
The patent designs reference signals that serve multiple functions: they enable non-linearity information acquisition, provide channel estimation, and support signal synchronization. By making the reference signals multi-functional, the patent improves measurement precision without proportionally increasing system complexity.
Solution Approach 2:
The patent performs non-linearity information acquisition in advance using reference signals before actual data transmission. This preliminary action allows the system to pre-compute compensation parameters, reducing the computational burden during data reception and thereby limiting the increase in overall system complexity.
3Area of stationary object
If non-linearity information of interference signals is acquired, then coverage increases, but processing time increases
Solution Approach 1:
The patent employs periodic reference signals transmitted at regular intervals to acquire non-linearity information. This periodic action allows the system to update non-linearity parameters continuously without requiring continuous processing, thereby extending coverage while controlling processing time through time-division multiplexing.
Solution Approach 2:
The patent uses reference signals as copies or representatives of the actual data signals. By measuring non-linearity characteristics on these reference signal copies rather than directly processing all data signals, the system can acquire non-linearity information for extended coverage areas with reduced processing time.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate a post-4G communication system such as LTE. A method performed by a UE in a wireless communication system includes receiving first RS-related information for the UE and second RS-related information for an interference UE that is causing nonlinearity interference to the UE, receiving a first RS based on the first RS-related information and a second RS based on the second RS-related information, obtaining first nonlinearity information for nonlinearity of a first signal that a BS transmits to the UE and second nonlinearity information for nonlinearity of a second signal that the BS transmits to the interference UE, based on the first RS and the second RS, and performing NC for a DL signal received from the BS, based on the first nonlinearity information and the second nonlinearity information.