Phase Noise Compensation Reference Signal Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively compensating for phase noise and Doppler impact, particularly in high-speed and high-frequency environments, which affect signal quality and transmission efficiency.
Innovation Solution
The introduction of a Phase Noise Compensation Reference Signal (PCRS) that considers the transmission location of a Demodulation Reference Signal (DMRS), allowing for transmission across multiple frequency axes to minimize phase noise and Doppler impact, thereby improving signal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a PCRS is transmitted through multiple frequency axes, then phase noise and Doppler impact are minimized, but device complexity increases
Solution Approach 1:
The patent transmits PCRS across multiple frequency axes (horizontal dimension) in addition to the time dimension, creating a two-dimensional transmission structure. This multi-frequency approach diversifies the signal path and reduces the impact of phase noise and Doppler effects that affect single-frequency transmissions, thereby improving signal quality while managing complexity through structured frequency allocation
2Measurement precision
If PCRS transmission location is optimized considering DMRS location, then compensation effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent performs preliminary coordination by determining the PCRS transmission location based on the DMRS location before actual transmission occurs. This advance planning ensures that the PCRS is positioned optimally for phase noise compensation while avoiding conflicts with DMRS resources, improving compensation accuracy without requiring complex real-time adjustments during transmission
3Reliability
If PCRS is transmitted across multiple frequency axes, then Doppler impact is reduced, but loss of information increases
Solution Approach 1:
The patent applies partial action by transmitting PCRS on selected frequency axes rather than all available frequencies. This selective approach provides sufficient phase noise and Doppler compensation through strategic frequency placement while minimizing the overhead and information loss associated with transmitting reference signals across the entire frequency spectrum
Data Source
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AI summary
A method for transmitting and receiving, by a user equipment (UE), a phase noise compensation reference signal (PCRS) in a wireless communication system is disclosed. The method includes receiving, from a base station, control information related to a transmission of a downlink data, the control information including at least one of a precoding scheme related to the downlink data, a number of transmission ranks, or a modulation and coding scheme (MCS) level; checking a transmission location of a demodulation reference signal (DM-RS) for demodulating the downlink data based on the received control information; and receiving, from the base station, the PCRS on at least one symbol after a transmission symbol of the DM-RS considering the checked transmission location of the DM-RS.