PTRS Phase Noise Estimation With Interference Parameter Feedback
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Solution Overview
Problem
In existing communication systems, non-linear precoding of phase tracking reference signals (PTRS) leads to improper phase noise estimation at the receive end, affecting communication performance due to damage in phase and amplitude, which cannot be accurately compensated.
Innovation Solution
The receive end determines phase noise estimation based on first information indicating interference parameters, such as phase and amplitude sets, to accurately compensate for phase noise, improving communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-linear precoding with modulo operation is performed on PTRS at the transmit end, then interference cancellation is improved, but phase and amplitude damage occurs leading to improper phase noise estimation at the receive end
Solution Approach 1:
The transmit end performs preliminary action by indicating the first parameter corresponding to interference information of the first PTRS to the receive end before the receive end performs phase noise estimation. This allows the receive end to compensate for the parameter introduced by non-linear operation, thereby resolving the contradiction between interference cancellation performance and phase noise estimation accuracy
Solution Approach 2:
The transmit end provides feedback information (first information indicating the first parameter) to the receive end, enabling the receive end to adjust its phase noise estimation process. This feedback mechanism allows the system to maintain both good interference cancellation performance and accurate phase noise estimation by compensating for the effects of non-linear precoding
2Power
If non-linear precoding is applied to PTRS, then signal power is increased through interference cancellation matrix, but phase and amplitude are damaged due to modulo operation
Solution Approach 1:
The transmit end performs preliminary action by indicating the first parameter corresponding to interference information of the first PTRS to the receive end before the receive end performs phase noise estimation. This allows the receive end to compensate for the parameter introduced by non-linear operation, thereby resolving the contradiction between interference cancellation performance and phase noise estimation accuracy
Solution Approach 2:
The invention changes the parameter representation by indicating the first parameter (which may include phase set and amplitude set) rather than directly transmitting the processed signal. This parameter change allows the receive end to reconstruct the signal with correct phase and amplitude information, resolving the damage caused by modulo operation while maintaining the power benefits of non-linear precoding
Data Source
AI summary
In accordance with an embodiment, a phase noise estimation method includes: obtaining, by a receive end, first information indicating a first parameter corresponding to interference information of a first phase tracking reference signal (PTRS), wherein the first parameter comprises one or more of a first phase set or a first amplitude set; obtaining, by the receive end, a first signal, wherein the first signal is determined based on the first parameter and the interference information of the first PTRS, wherein an amplitude of the first signal meets a first threshold; and determining, by the receive end based on the first information and the first signal, an estimated value of a phase noise corresponding to the first PTRS.