PTRS Mapping Position Adjustment for Phase Noise Compensation
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Solution Overview
Problem
Future radio communication systems, such as 5G, lack a defined method for mapping Phase Tracking Reference Signals (PTRS) in downlink and uplink signals, leading to ineffective compensation of phase fluctuations caused by phase noise, resulting in potential quality degradation of radio link signals.
Innovation Solution
A radio transmission device that includes a transmitter for sending a radio link signal with a phase tracking reference signal and a controller to determine the optimal mapping position of the PTRS in the time domain based on a reference position, ensuring effective phase fluctuation correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Phase Tracking Reference Signal (PTRS) is introduced to correct phase fluctuations in future radio communication systems, then phase noise compensation capability is improved, but the mapping arrangement method becomes undefined and complex
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the mapping position of PTRS in the time domain based on the reference position. The controller modifies the time domain position parameter of PTRS according to the reference position from higher layer signaling, enabling flexible adaptation to different phase noise conditions without requiring complex predefined mapping arrangements.
2Device complexity
If PTRS mapping position is fixed without defined arrangement method, then device complexity is reduced, but phase fluctuation correction effectiveness deteriorates
Solution Approach 1:
The patent implements dynamics by making the PTRS mapping position adjustable rather than fixed. The controller dynamically determines the time domain position of PTRS based on the reference position received from higher layers, allowing the system to adapt to varying propagation channel conditions and frequency characteristics, thereby maintaining effective phase fluctuation correction without overly complex predefined arrangements.
Data Source
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AI summary
A terminal (20) comprising a controller (203) configured to map a phase tracking reference signal, PTRS, to at least one symbol used for an uplink shared channel; and a transmitter (209) configured to perform transmission processing for the uplink shared channel and the PTRS, characterized in that when the transmitter (209) transmits a demodulation reference signal, DMRS, using a first symbol and a second symbol in the uplink shared channel, the controller (203) is configured to set the second symbol as a reference for mapping a PTRS which is mapped in a temporally backward of the second symbol.