Phase Compensation Reference Signal for 5G Phase Noise
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Solution Overview
Problem
High-frequency bands in 5G communication systems experience signal attenuation due to phase errors, which are not effectively compensated by existing reference signals, particularly in environments using higher order modulation schemes like 16QAM, 64QAM, and 256QAM.
Innovation Solution
A phase compensation reference signal (PCRS) is generated and transmitted by the base station, allowing terminals to estimate channel information and compensate for phase noise, using the same precoding as demodulation reference signals (DMRS), thereby improving signal transmission and reception efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If higher frequency bands (mmWave) are used to achieve higher data rates, then data transmission speed is improved, but signal attenuation due to phase errors increases
Solution Approach 1:
The patent segments the reference signal function into two distinct parts: DMRS for channel estimation and PCRS for phase noise compensation. This segmentation allows each reference signal to be optimized for its specific purpose, with PCRS specifically designed to address phase errors in high-frequency bands without interfering with the channel estimation function of DMRS.
Solution Approach 2:
The PCRS acts as an intermediary reference signal that mediates between the transmitted signal and the receiver. It provides a dedicated mechanism for measuring and compensating phase noise, enabling reliable high-frequency communication by isolating and correcting phase errors separately from the main data transmission path.
2Device complexity
If existing reference signals are used in high-frequency bands, then device complexity is reduced, but phase noise compensation effectiveness is insufficient
Solution Approach 1:
The patent applies local quality by creating a specialized PCRS with specific properties tailored for phase noise measurement. The PCRS uses distinct resource element allocations and signal structures in specific locations within the time-frequency grid, providing locally optimized phase compensation without requiring complex changes to the entire reference signal system.
3Adaptability or versatility
If PCRS is transmitted with different precoding than DMRS, then adaptability to different transmission modes is improved, but terminal processing complexity increases
Solution Approach 1:
The patent implements dynamics by allowing the precoding of PCRS to be independently configurable relative to DMRS. The base station can dynamically adjust whether PCRS uses the same or different precoding based on transmission conditions, while the terminal adapts its processing based on received indications, enabling flexible operation without fixed complex processing requirements.
Data Source
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AI summary
A method and system for converging a 5th-generation (5G) communication system for supporting higher data rates beyond a 4th-generation (4G) system with a technology for Internet of Things (IoT) are provided. The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The method for transmitting and receiving a phase compensation reference signal (PCRS) to compensate for phase noise. The method may determine whether a first precoding is applied to a demodulation reference signal (DMRS) and the PCRS to be transmitted to a terminal. The base station may also generate the DMRS and the PCRS, based on whether the first precoding is applied to the DMRS and the PCRS, and transmit data, the DMRS, and the PCRS to the terminal.