Multi-band Joint Communications and Radar Resource Allocation
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Solution Overview
Problem
Conventional wireless communication systems face challenges in achieving effective multi-band joint communications and radar operations, resulting in poor radar range estimation at long distances, multi-radar interference, and high power consumption due to limited resources in single-band operations.
Innovation Solution
The implementation of multi-band joint communications and radar techniques, where wireless devices transmit capability messages to indicate supported and unsupported bands for JCR operations, allowing for resource allocation and parameter configuration for joint communications and radar sensing, enabling improved frequency diversity and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-band operations are used for joint communications and radar, then device complexity is reduced, but radar range estimation deteriorates at long distances and multi-radar interference increases
Solution Approach 1:
The patent divides the radar and communication operations into multiple frequency bands. Different bands are allocated for different functions: lower bands (e.g., 6 GHz) are used for radar sensing to achieve long-range detection, while higher bands (e.g., 28 GHz, 38 GHz) are used for high-speed communications. This segmentation allows each band to be optimized for its specific purpose, resolving the contradiction between system simplicity and radar range estimation accuracy.
Solution Approach 2:
The patent introduces a frequency dimension by operating across multiple bands simultaneously. Instead of relying on a single frequency band, the system exploits the frequency domain to separate radar and communication signals. This dimensional expansion enables the system to achieve both accurate radar range estimation and high-data-rate communications without increasing overall system complexity.
2Device complexity
If single-band operations are used for joint communications and radar, then resource allocation is simplified, but multi-radar interference increases due to limited resources
Solution Approach 1:
The patent segments the spectrum into multiple bands and allocates specific bands for radar operations and others for communications. By separating radar and communication resources in the frequency domain, the system eliminates multi-radar interference while maintaining simple resource allocation protocols. Each band operates independently with dedicated resources.
3Productivity
If higher frequency bands are used for joint communications and radar, then data rate is improved, but power consumption increases
Solution Approach 1:
The patent segments frequency bands and assigns them to different functions based on their characteristics. Lower bands with better propagation properties are used for radar sensing, while higher bands are used for communications when needed. This segmentation allows the system to achieve high data rates only when necessary, reducing overall power consumption compared to continuous high-band operation.
Solution Approach 2:
The patent dynamically changes operational parameters including frequency band selection, transmit power levels, and duty cycles based on communication and radar requirements. By adjusting these parameters adaptively, the system achieves high data rates only when required while minimizing power consumption during radar-only or communication-only periods.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. For example, a wireless device may support multi-band joint communication and radar (JCR) techniques. In some cases, a first wireless device may transmit, to a second wireless device, a capability message indicating whether a set of bands supports JCR operations. The second wireless device may transmit control signaling, based on the capability message, indicating a set of parameters for JCR operations including resources allocated for JCR operations. The first wireless device may transmit a JCR signal based on the control signaling via the allocated resources. For example, the first wireless device may transmit the signal for both communications and radar sensing in accordance with the set of parameters via the allocated resources.