Bi-Static Beam Pairing With Non-Overlapping PDSCH Resource Mapping
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G NR, face challenges in integrating radio frequency (RF) sensing and communication effectively, necessitating improved resource mapping and channel estimation for enhanced performance.
Innovation Solution
The implementation of physical downlink shared channels (PDSCHs) on non-overlapping resource elements (REs) and resource block groups (RBGs) for orthogonal waveform orthogonality, enabling MIMO sensing and DMRS channel estimation, along with interleaving patterns for radar sensing and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PDSCHs are mapped on overlapping resource elements for communication efficiency, then data transmission capacity is improved, but channel estimation accuracy and sensing performance deteriorate
Solution Approach 1:
The patent segments the resource elements into communication resources and sensing resources, allocating non-overlapping REs for different PDSCH ports to enable orthogonal waveform transmission. This segmentation allows separate channel estimation for each port without interference, resolving the contradiction between resource utilization and estimation accuracy.
Solution Approach 2:
The patent introduces port dimension orthogonality by mapping different PDSCHs to different ports with non-overlapping REs. This dimensional separation in the port space enables simultaneous communication and sensing functions without resource conflict, improving both data transmission and channel estimation performance.
2Measurement precision
If resource elements are allocated for radar sensing, then sensing capability is improved, but communication data transmission efficiency deteriorates
Solution Approach 1:
The patent enables PDSCH resources to serve dual purposes: communication data transmission and radar sensing. By configuring specific PDSCH ports with non-overlapping REs for sensing, the system achieves multi-functionality where the same physical layer infrastructure supports both communication and sensing operations simultaneously.
Solution Approach 2:
The patent merges communication and sensing functions into a unified resource allocation framework. Through integrated PDSCH configuration and DMRS design, the system combines data transmission and sensing capabilities, allowing resources to be shared between the two functions without requiring separate dedicated resources.
3Productivity
If multiple PDSCHs are transmitted on the same resource elements for high spectral efficiency, then resource utilization is improved, but waveform orthogonality and demodulation performance deteriorate
Solution Approach 1:
The patent segments the frequency-time resources into non-overlapping sets for different PDSCH ports, ensuring waveform orthogonality. This segmentation prevents inter-port interference while maintaining efficient resource utilization through coordinated allocation across multiple ports.
Data Source
AI summary
Aspects presented herein may improve the performance of a JCS system by providing various resource mapping for the sensing and communication of the JCS system. Aspects presented herein may enable a base station to use PDSCH for MIMO sensing with FDM based waveform orthogonality, and may also enable a UE to support DMRS channel estimation when PDSCH is used for MIMO sensing with FDM based waveform orthogonality. In one aspect, a UE receives a plurality of PDSCHs on a plurality of ports, each PDSCH of the plurality of PDSCHs being received through a different port of the plurality of ports, each PDSCH of the plurality of PDSCHs being received on a different set of non-overlapping REs within each RB of a set of RBs. The UE demodulates each PDSCH of a port based on DMRS received through the port.