Reference Signal Subband Configuration for Precise Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The performance of existing reference signals in carrier phase positioning technologies, such as SRS and PRS, fails to meet positioning requirements in certain scenarios, necessitating improved signal configuration to enhance precision and reduce interference.
Innovation Solution
Configuring a reference signal with multiple subbands on the same time domain resource, where adjacent subbands are separated in the frequency domain by specific units, and utilizing indication information to optimize frequency domain positions and signal sequences, thereby reducing resource overheads and peak-to-average power ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reference signal uses a single continuous frequency domain resource, then the signal power is concentrated, but the positioning precision and signal-to-interference ratio are insufficient
Solution Approach 1:
The reference signal is divided into multiple subbands in the frequency domain, where each subband is separated by at least one frequency domain unit. This segmentation distributes the signal across multiple frequency resources, improving positioning precision through diverse frequency measurements while reducing signal interference through frequency diversity
Solution Approach 2:
The patent transitions from a single continuous frequency resource to a multi-dimensional frequency distribution pattern by introducing frequency domain separations between subbands. This creates a distributed frequency structure that simultaneously achieves better positioning precision and interference reduction
2Measurement precision
If multiple frequency domain resources are allocated for reference signals, then positioning precision improves, but resource overhead increases
Solution Approach 1:
Different subbands are configured with specific frequency domain positions and bandwidths tailored to local requirements. The first configuration information includes first indication information for a first frequency domain resource and second indication information for positions of subbands, allowing optimized resource allocation in different frequency regions
Solution Approach 2:
The patent uses at least two subbands with frequency domain separations, which is more than the traditional single continuous resource but avoids allocating resources to all possible frequency positions. This partial distribution achieves improved positioning precision while controlling resource overhead through selective subband configuration
3Measurement precision
If reference signal bandwidth is increased, then positioning precision improves, but peak-to-average power ratio increases
Solution Approach 1:
The reference signal bandwidth is segmented into multiple subbands separated in frequency domain. This segmentation allows the total bandwidth to be distributed across non-contiguous frequency resources, maintaining the bandwidth benefit for positioning precision while reducing peak power concentration
Solution Approach 2:
The patent changes the frequency domain parameters by introducing separations between subbands. The first configuration information includes parameters for frequency domain positions and bandwidths of subbands, transforming the power distribution characteristics to reduce peak-to-average ratio while preserving positioning precision
Data Source
Figure 1~3
Figure 4
Figure 5(a)~5(b)
AI summary
This application provides a signal configuration method, an apparatus, and a system, and may be applied to the field of communication technologies, to improve positioning precision. The method includes: A terminal device receives first configuration information, and configures a reference signal based on the first configuration information, where the reference signal corresponds to at least two subbands on a same time domain resource, and adjacent subbands in the at least two subbands are separated in frequency domain by at least one frequency domain unit.