Antenna-Port Random Phase Measurement for Sensing Accuracy
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Solution Overview
Problem
Non-ideal factors in user equipment (UE) hardware and hardware circuits affect the accuracy of channel state information (CSI) measurement in integrated sensing and communication systems, particularly due to random phase offsets in uplink channel estimation, leading to sensing errors.
Innovation Solution
Perform random phase measurement on antenna ports of transmitting nodes, such as terminals, to obtain measurement results that are used to improve sensing performance by reducing the impact of random phases on sensing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel estimation is performed based on reference signal in integrated sensing and communication, then sensing measurement can be obtained, but random phase offsets in uplink channel estimation cause measurement errors and reduce sensing accuracy
Solution Approach 1:
The patent replaces traditional channel estimation methods based on reference signals with a random phase measurement method. Instead of relying on CSI measurement which is affected by random phase offsets, the invention directly measures random phases using a dedicated random phase reference signal, substituting the problematic measurement mechanism with a more accurate alternative that directly targets the phase parameters.
Solution Approach 2:
The patent changes the measurement parameter from channel state information (which includes amplitude and phase) to specifically measuring random phase offsets. By introducing a dedicated random phase reference signal and measuring only the phase component, the system transforms the measurement approach to focus on the critical parameter that was previously contaminated by other factors.
2Productivity
If uplink channel estimation is performed at different uplink moments, then channel information can be obtained, but discontinuous phases with random phase offsets are introduced, affecting sensing accuracy
Solution Approach 1:
The patent performs preliminary random phase measurement before the actual sensing measurement. By measuring the random phase offsets in advance using the random phase reference signal and storing these measurements, the system prepares correction data that can be applied to subsequent sensing measurements, preventing the accumulation of phase errors across multiple uplink moments.
Solution Approach 2:
The patent implements a feedback mechanism where random phase measurement results are obtained, stored, and then used to correct sensing measurements. The measured random phases are fed back into the sensing processing chain, allowing the system to compensate for phase discontinuities and maintain measurement accuracy across different uplink moments.
Data Source
AI summary
This application discloses a sensing method and apparatus, and a device, and belongs to the field of communication technologies. The sensing method includes: A first device receives a first signal sent by a second device, where the first signal is used for random phase measurement of an antenna port of the second device, the second device is a terminal, and the second device is a transmitting node of a signal related to a sensing service or an integrated sensing and communication service; the first device performs random phase measurement based on the first signal, to obtain a first random phase measurement result; and the first device performs a first operation, where the first operation includes at least one of the following: sending the first random phase measurement result to the second device or a third device; or performing a sensing-related operation based on the first random phase measurement result.