ISAC TDD Resource Allocation Using Kernel-Based Sparse Arrays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The design of large-scale sparse arrays in Integrated Sensing and Communication (ISAC) systems with Time-Division Duplexing (TDD) channels faces high computational complexity and resource allocation constraints due to the duplexing operation, leading to inefficiencies in sensing resource utilization.
Innovation Solution
A multi-tier array structure is introduced, simplifying the array design by breaking it into kernels, which are constrained to adhere to TDD channel duplexing restrictions, ensuring sensing signals are only placed within permissible Downlink resources, thereby reducing computational complexity and improving sensing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If large-scale sparse arrays are designed for ISAC systems, then sensing performance is improved, but computational complexity increases significantly
Solution Approach 1:
The patent divides the large-scale array design into multiple kernels, where each kernel represents a smaller sub-array configuration. This segmentation allows the system to achieve large-scale sensing performance through coordinated multiple small kernels rather than designing and computing a single large array, thereby reducing computational complexity while maintaining sensing accuracy.
2Productivity
If sensing signals are placed in all available resources, then sensing resource utilization is maximized, but TDD duplexing constraints are violated
Solution Approach 1:
The patent applies local quality by differentiating resource allocation between downlink and uplink periods in TDD systems. Sensing signals are selectively placed only in downlink resources where they can be transmitted, while uplink resources are excluded from sensing signal placement. This localized approach ensures TDD duplexing constraints are satisfied while still utilizing available downlink resources effectively for sensing.
Data Source
AI summary
Various solutions for determining array associated with resource allocation in an Integrated Sensing and Communication (ISAC) system with Time-Division Duplexing (TDD) channel with respect to an apparatus in mobile communications are described. The apparatus may determine an array according to one or more kernels. The array may be associated with a resource allocation. In at least one kernel, elements may be associated with unavailable resource units. The apparatus may transmit a plurality of signals based on the array associated with the resource allocation.