Spectrum Sensing in the Presence of Multiple Primary Users

TL;DR

This paper analyzes a spherical test-based detector for multi-antenna cooperative spectrum sensing in cognitive radio networks with multiple primary users, providing accurate analytical formulas for performance metrics.

Contribution

It introduces a new analytical framework for spectrum sensing with multiple primary users, deriving closed-form expressions for key performance metrics.

Findings

Analytical formulas accurately predict detector performance.

The spherical test detector performs well in multi-primary user scenarios.

Simulation results validate the theoretical analysis.

Abstract

We consider multi-antenna cooperative spectrum sensing in cognitive radio networks, when there may be multiple primary users. A detector based on the spherical test is analyzed in such a scenario. Based on the moments of the distributions involved, simple and accurate analytical formulae for the key performance metrics of the detector are derived. The false alarm and the detection probabilities, as well as the detection threshold and Receiver Operation Characteristics are available in closed form. Simulations are provided to verify the accuracy of the derived results, and to compare with other detectors in realistic sensing scenarios.