The ever-increasing demand for higher data rates in wireless communications in the face of
limited or underutilized spectral resources has motivated the introduction of cognitive radio …

The problem of multiple antenna spectrum sensing in cognitive radio (CR) networks is
studied in this paper. We propose two new invariant constant false-alarm rate eigenvalue …

We investigate spectrum sensing in cognitive radios with large antenna arrays. Gigantic
MIMO and extra-large array antennas are fundamental technologies in 5G and future 6G …

This work proposes the concept and reports the implementation of an adaptive and cognitive
radio over fiber architecture. It is aimed at dealing with the new demands for convergent …

In this paper we deal with spoofing detection in GNSS receivers. We derive the optimal
genie detector when the true positions are perfectly known, and the observation errors are …

Cognitive Radio (CR) networks presents a paradigm shift aiming to alleviate the spectrum
scarcity problem exasperated by the increasing demand on this limited resource. It promotes …

Cyclostationary processes exhibit a form of frequency diversity. Based on that, we show that
a digital waveform with symbol period T can be asymptotically represented as a rank-1 …

We consider spectrum sensing of a second-order cyclostationary signal received at multiple
antennas. The proposed detector exploits both the spatial and the temporal correlation of the …

This paper presents a sequential likelihood ratio test (SLRT) detector for spectrum sensing
scenarios in cognitive radios (CRs). Similar to other CR detectors, we exploit the structure of …

We consider spectrum sensing of signals encoded with an orthogonal space-time block
code (OSTBC). We propose a CFAR detector based on knowledge of the eigenvalue …