Federal Incumbent Radar Detection via ESC Segmentation
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Solution Overview
Problem
The challenge is to detect Federal Incumbent signals in the 3.5 GHz band to prevent interference from licensed and unlicensed users in shared spectrum environments, ensuring protection for Federal incumbent services.
Innovation Solution
A system and method that utilize an Environmental Sensing Capability (ESC) sensor and ESC core to estimate power spectral density, segment frequency bins, and apply radar spectral signal matching algorithms or additional techniques to detect signals, with an encrypted backhaul communication link and signal processing functions to provide indications to a Spectrum Access System.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional spectrum sharing rules are implemented allowing commercial use of 3.5 GHz band, then spectrum utilization is improved, but interference risk to Federal incumbent services increases
Solution Approach 1:
The system performs preliminary detection of Federal Incumbent signals before allowing licensed and unlicensed users to transmit. The ESC sensor continuously monitors the spectrum and identifies FIR signals in advance, enabling the SAS to make informed decisions about spectrum allocation that prevent interference before it occurs.
Solution Approach 2:
The system implements continuous feedback through the ESC sensor that monitors the shared spectrum for Federal Incumbent signals. This feedback loop provides real-time information to the SAS, which adjusts spectrum access decisions dynamically to protect FIR services while enabling commercial utilization.
2Productivity
If spectrum sharing between Federal incumbent services and commercial users is implemented, then spectrum efficiency is improved, but detection complexity increases
Solution Approach 1:
The detection system is segmented into specialized components: an ESC sensor for signal detection, an ESC core for processing, and integration with the SAS. This segmentation divides the complex detection task into manageable parts, with each component performing specific functions to reduce overall system complexity while maintaining high detection capability.
Solution Approach 2:
The ESC sensor and ESC core act as intermediaries between the physical spectrum and the SAS decision-making system. They translate complex electromagnetic signal analysis into simplified detection results that the SAS can use for spectrum management, reducing the complexity burden on the overall system.
3Reliability
If Federal Incumbent signals are detected with high accuracy to prevent interference, then protection reliability is improved, but detection time increases
Solution Approach 1:
The ESC sensor performs continuous preliminary monitoring of the spectrum for Federal Incumbent signals before commercial users are granted access. This advance detection ensures high reliability in identifying FIR signals and prevents interference, while the continuous nature of monitoring reduces the effective detection time when actual transmission decisions are needed.
Solution Approach 2:
The system maintains continuous spectrum monitoring through the ESC sensor, ensuring that detection is an ongoing process rather than a periodic check. This continuity provides both high reliability in signal detection and rapid response time when spectrum access decisions must be made, as the detection function is already active and monitoring.
Data Source
AI summary
A method for detecting the presence of a signal in a frequency spectrum is provided. The method includes receiving the frequency spectrum. The power spectral density of the received frequency spectrum is estimated. A plurality of frequency bins are segmented for the frequency spectrum based on the estimated power spectral density. For segments with an estimated power spectral density above a first threshold, a radar spectral signature matching algorithm is applied to detect the presence of the signal and for segments with a power estimate below the first threshold and above a second threshold, additional techniques are applied to detect the presence of the signal.