Spectrum sensing detects the availability of the radio frequency spectrum, which is essential
and vital to cognitive radio. Traditional techniques for spectrum sensing fail to take the …

For a cognitive radio (CR) system, we investigate the estimation problem in which a
secondary user (SU) estimates the channel parameters such as the sojourn times on the …

As part of the effort toward building a cognitive radio (CR) network testbed, we have
demonstrated real-time spectrum sensing. Spectrum sensing is the cornerstone of CR …

Spectrum efficiency (SE) and energy efficiency (EE) are two key design objectives in future
wireless communication networks. In traditional cognitive radio (CR) network, a secondary …

Spectrum sensing is considered as the cornerstone of cognitive radio networks (CRNs).
However, sensing the wide-band spectrum results in delays and resource wasting …

Dynamic spectrum access is a must-have ingredient for future sensors that are ideally
cognitive. The goal of this paper is a tutorial treatment of wideband cognitive radio and radar …

Response delay problem and measurements of such delays have been reported in Part I.
The response delay has a negative impact on the accuracy of spectrum sensing, which is …

Although most of the research on Cognitive Radio is focused on communication bands
above the HF upper limit (30 MHz), Cognitive Radio principles can also be applied to HF …

Spectrum sensing is performed at the beginning of each time slot in traditional cognitive
radio networks, which is unreasonable and needless since the presence or the absence of a …

Cognitive radio is an emerging technology for sensing and dynamic access of spectrum in
mobile radio environments. It aims at dynamically allocating unused bandwidth among …