Reference Signal Placement for Phase Noise and Multipath Compensation
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Solution Overview
Problem
Long Term Evolution (LTE) systems face challenges with out-of-band leakage and phase noise in terahertz scenarios, leading to inter-subband interference and reduced spectral efficiency, which existing technologies like phase tracking reference signals fail to adequately address.
Innovation Solution
A method involving the transmission of reference signals across specific symbols of physical resource blocks, where the first H symbols and last T symbols of each block are used for phase noise estimation and multipath delay compensation, respectively, without requiring additional guard intervals, ensuring continuity and reducing out-of-band leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reference signals are transmitted in a full-duplex system, then communication functionality is enabled, but self-interference occurs between transmission and reception signals
Solution Approach 1:
The patent introduces reference signals as an intermediary mechanism to measure and characterize the self-interference channel. By transmitting known reference signals and measuring the interference they experience, the system can estimate the self-interference characteristics and apply appropriate cancellation techniques, enabling full-duplex operation despite the presence of self-interference
Solution Approach 2:
The patent implements a feedback mechanism where reference signals are transmitted, the resulting self-interference is measured, and this measurement is used to adjust and optimize the full-duplex communication parameters. The base station uses the measured reference signals to estimate interference characteristics and apply cancellation, creating a closed-loop system that continuously optimizes performance
2Productivity
If multiple base stations coordinate to transmit reference signals at the same time, then measurement efficiency is improved, but interference between reference signals from different base stations occurs
Solution Approach 1:
The patent segments the reference signal transmission process by assigning different base stations to transmit reference signals in different time slots or resource configurations. This segmentation allows multiple base stations to perform reference signal measurements without causing mutual interference, as each base station's reference signals are transmitted at different times or with different characteristics that prevent confusion
Solution Approach 2:
The patent employs dynamic resource allocation where base stations can adaptively adjust their reference signal transmission timing and resources based on the operational state of neighboring base stations. When multiple base stations need to perform measurements, they dynamically coordinate to avoid simultaneous transmission that would cause interference, optimizing both measurement efficiency and interference avoidance
Data Source
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AI summary
Provided are a reference signal transmission method and apparatus, a communication node, and a storage medium. The method includes transmitting a first reference signal through the first H symbols of a physical resource block in the time domain, where H is greater than or equal to 2; and transmitting a second reference signal through the last T symbols of the physical resource block in the time domain, where T is greater than or equal to H.