DFT-s-OFDM Uplink PTRS Allocation for Multi-Stream Phase Noise
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Solution Overview
Problem
In 5G mobile communication systems, the use of high-frequency bands leads to phase noise issues, and existing protocols lack a time domain resource mapping rule for multiple PTRS ports when using DFT-s-OFDM waveforms, hindering accurate phase noise measurement for multiple data streams.
Innovation Solution
A method for determining and sending PTRS signals through multiple PTRS ports, allocating PTRS samples and groups to these ports to resolve time domain resource mapping, improving pilot density and phase noise measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple data streams are transmitted using DFT-s-OFDM waveform, then transmission performance is improved, but phase noise measurement accuracy deteriorates due to lack of mapping rules for multiple PTRS ports
Solution Approach 1:
The patent segments the time domain signal into multiple distinct regions, each assigned to a specific PTRS port. This segmentation allows multiple PTRS ports to be clearly distinguished in the time domain, enabling accurate phase noise measurement for each data stream while maintaining the benefits of multi-stream transmission.
2Device complexity
If a single PTRS port is used, then protocol simplicity is maintained, but the ability to measure phase noise for multiple data streams is insufficient
Solution Approach 1:
The patent introduces a time domain dimension for PTRS port differentiation. By allocating specific time domain regions to each PTRS port, the system can support multiple ports without significantly increasing protocol complexity, as the differentiation is achieved through time domain positioning rather than complex signaling mechanisms.
Data Source
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AI summary
This application provides a data transmission method and a related apparatus. This helps resolve a problem of time domain resource mapping of a plurality of PTRS ports. The method includes: determining x phase tracking reference signal PTRS groups, where each of the x PTRS groups includes y PTRS samples, and x and y are integers greater than or equal to 2; determining a first PTRS signal corresponding to a first PTRS port, where the first PTRS signal includes z1 PTRS samples; determining a second PTRS signal corresponding to a second PTRS port, where the second PTRS signal includes z2 PTRS samples; and during uplink data transmission, sending the first PTRS signal corresponding to the first PTRS port and the second PTRS signal corresponding to the second PTRS port. z1 and z2 are positive integers, and a sum of z1 and z2 is equal to a product of x and y.