Phase Jump Estimation for Sidelink DMRS Bundling
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Solution Overview
Problem
Sidelink DMRS bundling in wireless communication systems faces challenges due to phase jumps and phase noise, which disrupt coherent combining of signals across slots, leading to inaccurate channel estimation and reduced throughput.
Innovation Solution
The implementation of phase jump estimation techniques allows for the generation of a reference signal copy, enabling joint channel estimation by removing phase errors and facilitating coherent combining across slots, thereby improving channel estimation accuracy and increasing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phase jump estimation techniques are implemented to enable coherent combining across slots, then channel estimation accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by estimating phase jumps between slots before performing coherent combining of DMRS signals. The receiving device calculates phase differences using reference signals from multiple slots, then compensates for these phase jumps in advance to enable accurate channel estimation across slot boundaries, thereby resolving the technical contradiction between improving measurement precision and managing device complexity.
2Productivity
If DMRS bundling is performed across multiple slots to increase throughput, then productivity is improved, but reliability deteriorates due to phase jumps and phase noise
Solution Approach 1:
The patent implements feedback by using phase reference signals transmitted across multiple slots to measure and estimate phase jumps. The receiving device continuously monitors phase differences between slots and uses this feedback information to compensate for phase noise and jumps, thereby maintaining reliable coherent combining and channel estimation while enabling DMRS bundling across slots to improve throughput.
3Measurement precision
If phase errors are removed to facilitate coherent combining, then channel estimation accuracy is improved, but loss of information increases due to additional processing
Solution Approach 1:
The patent applies copying by generating a corrected version of the reference signal from the second slot by removing estimated phase jumps and errors. This corrected reference signal copy is then combined with the original first reference signal to perform coherent channel estimation. The copying approach preserves the essential signal information while eliminating phase-related distortions, thereby improving measurement precision without significant information loss.
Data Source
AI summary
Apparatus, methods, and computer-readable media for facilitating phase jump estimation for SL DMRS bundling are disclosed herein. An example method includes receiving, from another device, first information at a first symbol of a first slot, the first slot including at least the first symbol and a first reference signal. The example method also includes receiving second information at a second symbol of a second slot, the second slot including at least the second symbol and a second reference signal, the first information and the second information being repetitions. The example method also includes generating a first reference signal copy based at least on the second reference signal and a phase jump between the first slot and the second slot. Additionally, the example method includes performing channel estimation across the first slot and the second slot based on an aggregation of the first reference signal and the first reference signal copy.