Modulo-Processed PTRS Phase Noise Estimation at the Receiver
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Solution Overview
Problem
In existing communication systems, non-linear precoding processing of phase tracking reference signals (PTRS) causes damage to the phase and amplitude, preventing the receive end from accurately estimating phase noise, which affects communication performance.
Innovation Solution
The receive end obtains first information indicating a parameter set corresponding to interference information of the PTRS, determining a first signal with an amplitude meeting a threshold, allowing accurate phase noise estimation and compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If non-linear precoding processing is performed on PTRS to reduce signal power, then signal power is reduced, but phase and amplitude are damaged
Solution Approach 1:
The transmit end performs preliminary action by pre-compensating the phase and amplitude of PTRS before non-linear precoding processing. This allows the receive end to accurately estimate phase noise despite the non-linear processing, resolving the contradiction between power reduction and phase accuracy preservation
Solution Approach 2:
The patent introduces an intermediary mechanism where the transmit end adds auxiliary information about phase and amplitude adjustments to the transmitted signal. This intermediary information enables the receive end to compensate for the non-linear processing effects, maintaining phase accuracy while achieving power reduction
2Object-affected harmful factors
If non-linear precoding processing is performed on PTRS to cancel interference, then interference cancellation is improved, but phase and amplitude are damaged
Solution Approach 1:
The transmit end performs preliminary phase and amplitude compensation on PTRS before applying non-linear precoding for interference cancellation. This preliminary action ensures that the receive end can accurately estimate phase noise even after interference cancellation processing
Solution Approach 2:
The patent introduces auxiliary information as an intermediary that carries details about the non-linear precoding processing applied to PTRS. This intermediary enables the receive end to reverse the processing effects and maintain phase accuracy while achieving interference cancellation
3Power
If modulo operation is applied to reduce signal power, then signal power is reduced, but phase and amplitude are damaged
Solution Approach 1:
The transmit end performs preliminary amplitude compensation before applying the modulo operation. This preliminary action preserves amplitude information that would otherwise be lost, enabling the receive end to accurately estimate both phase and amplitude despite the non-linear modulo processing
Solution Approach 2:
The patent introduces auxiliary information as an intermediary that conveys amplitude adjustment details to the receive end. This intermediary allows the receive end to compensate for the modulo operation's amplitude distortion while maintaining the power reduction benefit
Data Source
Figure 1a~1b
Figure 1c~1d(b)
Figure 1e(a)~1f
AI summary
Embodiments of this application provide a phase noise estimation method, an apparatus, and a system, relate to the field of communication technologies, and can resolve an existing technical problem that a receive end cannot properly estimate a phase noise corresponding to a PTRS due to a non-linear modulo operation introduced when a transmit end performs precoding processing on the PTRS. The method includes: The receive end obtains first information and a first information, and determines, based on the first information and the first signal, an estimated value of a phase noise corresponding to a first PTRS. The first information indicates a first parameter corresponding to interference information of the first PTRS. The first parameter includes one or more of the following: a first phase set, and a first amplitude set. The first signal is determined based on the first parameter and the interference information of the first PTRS. An amplitude of the first signal meets a first threshold.