PT-RS Frequency Domain Pattern Selection for Phase Noise
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in phase tracking reference signals (PT-RS) due to phase errors caused by phase noise, carrier frequency offset, and Doppler shift, leading to increased bit error rates and reduced throughput.
Innovation Solution
The method involves selecting and transmitting frequency domain patterns for PT-RS pilot signals based on channel conditions and scheduled bandwidth, allowing for dynamic adjustment of PT-RS tone locations and density to improve phase tracking accuracy and system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequency domain patterns for PT-RS pilot signals are dynamically adjusted based on channel conditions and scheduled bandwidth, then phase tracking accuracy is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic selection of frequency domain patterns for PT-RS pilot signals based on channel conditions and scheduled bandwidth. The system transitions from static to dynamic configuration by selecting different frequency domain patterns (e.g., dense or sparse patterns) according to real-time channel conditions and bandwidth requirements, thereby optimizing phase tracking accuracy while adapting to varying system states
Solution Approach 2:
The patent changes key parameters of the PT-RS configuration including frequency domain pattern density, tone spacing, and resource element allocation based on channel conditions and scheduled bandwidth. By adjusting these parameters dynamically, the system achieves improved phase tracking accuracy in challenging conditions while maintaining efficient resource utilization in better conditions
2Productivity
If PT-RS configuration is optimized based on channel conditions and bandwidth, then data rates are increased, but device complexity increases
Solution Approach 1:
The system dynamically optimizes PT-RS configuration parameters including frequency domain patterns, time domain positions, and resource allocation based on real-time channel conditions and scheduled bandwidth. This dynamic adaptation enables the system to achieve higher data rates by allocating appropriate PT-RS resources only when and where needed, rather than using fixed over-provisioned configurations
Solution Approach 2:
The patent adjusts multiple PT-RS parameters including frequency domain pattern selection (dense or sparse), tone spacing, resource element mapping, and time domain positioning based on channel conditions and bandwidth. These parameter changes enable optimized phase tracking that directly improves data rates while adapting to varying system requirements
3Reliability
If frequency domain patterns are selected to improve phase error estimation, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent selects and adjusts frequency domain pattern parameters including tone spacing, pattern density, and resource element allocation to optimize phase error estimation accuracy. By changing these parameters based on channel conditions, the system achieves improved reliability in phase tracking, particularly in challenging channel environments with high phase noise or Doppler shift
Solution Approach 2:
The system dynamically selects frequency domain patterns to match current channel conditions, transitioning between dense patterns for poor conditions and sparse patterns for good conditions. This dynamic adaptation improves reliability by ensuring adequate phase tracking resources are allocated when needed while reducing complexity when conditions permit
Data Source
AI summary
An apparatus for wireless communication selects a recommendation for the need. The apparatus selects the resource to transmit a phase tracking reference signal based on a condition of a communication system. The apparatus performs at least one of transmitting an indication of the selected recommendation for the resource to a second wireless communication device or transmitting at least one of information or a reference signal to the second device to assist the second device in determining the resource. In an aspect, the selection may be made based on receiving a request for a recommendation from the second wireless communication device or the transmitting the at least one of the information or the reference signal are based on a request received.