OFDM Subcarrier Allocation for Integrated Sensing and Communication
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Solution Overview
Problem
Existing integrated sensing and communication systems face inefficiencies in resource allocation, particularly in time division and frequency division methods, leading to underutilization of sensing resources and difficulties in continuous target tracking and reduced sensing resolution.
Innovation Solution
A signal processing method that allocates communication and sensing information on separate subcarrier sets within OFDM waveforms, allowing for the superimposition of time domain sequences to enhance resource utilization and maintain sensing resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If time division or frequency division resource allocation is used for integrated sensing and communication, then communication and sensing can be performed simultaneously, but sensing resources are not fully utilized and sensing resolution is reduced
Solution Approach 1:
The patent segments the OFDM signal into multiple subcarrier sets, with each subcarrier set independently carrying both communication and sensing information. This segmentation allows parallel processing of communication and sensing functions on different subcarriers, fully utilizing sensing resources while maintaining communication performance, thereby resolving the contradiction between resource utilization and sensing resolution.
2Productivity
If time division or frequency division resource allocation is used, then communication and sensing functions are separated, but continuous target tracking becomes difficult
Solution Approach 1:
The patent implements continuous sensing information acquisition across all subcarrier sets simultaneously, rather than alternating between communication and sensing in time or frequency domains. This continuous acquisition on all subcarriers ensures uninterrupted target tracking while maintaining full resource utilization for both communication and sensing functions.
3Productivity
If separate subcarrier sets are used for communication and sensing information, then resource allocation is optimized, but device complexity increases
Solution Approach 1:
The patent designs subcarrier sets that simultaneously serve both communication and sensing functions. Each subcarrier set is configured to carry communication data while also embedding sensing information, allowing a single signal structure to fulfill multiple functions. This multi-functionality approach optimizes resource allocation without requiring separate independent systems, thereby controlling device complexity.
Data Source
AI summary
Provided are a signal processing method, a communication device, a storage medium, and a program product. The method includes: determining a first subcarrier set and a second subcarrier set in to-be-transmitted information, where a first time domain sequence corresponding to the first subcarrier set is obtained according to communication information; obtaining a projection signal according to a vector corresponding to a first dataset and a target signal, where the first dataset includes at least part of data in the first time domain sequence corresponding to the first subcarrier set; obtaining a second time domain sequence corresponding to the second subcarrier set according to the projection signal; superimposing the first time domain sequence and the second time domain sequence to obtain a time domain signal corresponding to the to-be-transmitted information; and sending the time domain signal.