5-PP Subcarrier Allocation for Low-Correlation ISAC Sensing
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Solution Overview
Problem
Consecutive subcarrier allocation in integrated sensing and communication systems leads to significant signal correlation between subcarriers, impairing accurate detection of range and velocity in radar systems.
Innovation Solution
Implementing a resource allocation method based on a quintic permutation polynomial (5-PP) interleaver to disperse subcarrier allocation, reducing correlation and optimizing frequency domain resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If consecutive subcarrier allocation is used, then resource allocation simplicity is improved, but signal correlation between subcarriers increases
Solution Approach 1:
The patent divides the frequency domain resources into multiple resource blocks and applies different 5-PP interleaver parameters to different resource blocks. This segmentation approach allows the system to maintain simple resource allocation while reducing signal correlation through varied interleaving patterns across different resource block segments.
Solution Approach 2:
The patent changes the interleaver parameters (specifically the 5-PP polynomial coefficients) dynamically across different resource blocks or time slots. By varying these parameters, the system transforms the fixed consecutive allocation pattern into a more distributed pattern that reduces signal correlation while maintaining operational simplicity.
2Reliability
If 5-PP interleaver is used for resource allocation, then signal correlation is reduced, but device complexity increases
Solution Approach 1:
The patent uses parameter changes to implement 5-PP interleaving with different polynomial coefficients for different resource blocks. This approach reduces signal correlation effectively while controlling device complexity by using a systematic parameter variation method rather than complex allocation algorithms.
Solution Approach 2:
The 5-PP interleaver algorithm is designed to be self-configuring based on resource block indices and predefined parameter tables. The system automatically determines the appropriate interleaver parameters without requiring complex external control, thereby reducing device complexity while maintaining the correlation-reduction benefits.
3Measurement precision
If subcarrier allocation is dispersed, then sensing detection resolution is improved, but frequency domain resource distribution becomes more complex
Solution Approach 1:
The patent segments frequency domain resources into multiple resource blocks and applies dispersed allocation through 5-PP interleaving to each segment. This segmentation enables improved sensing detection resolution by distributing subcarriers non-consecutively while managing frequency domain complexity through structured segment-based allocation.
Solution Approach 2:
By changing the 5-PP interleaver parameters systematically across resource blocks, the patent achieves dispersed subcarrier allocation that improves sensing detection resolution. The parameter changes provide a controlled method to manage frequency domain resource distribution complexity while obtaining the resolution benefits of dispersed allocation.
Data Source
AI summary
A resource allocation method in a communication system, includes: determining a resource allocation scheme, the resource allocation scheme being performing resource allocation based on a quintic permutation polynomial (5-PP) interleaver; allocating a frequency domain resource based on the resource allocation scheme; and sending frequency domain information, the frequency domain information being configured to determine the allocated frequency domain resource.