Direct-conversion radio (DCR) receivers can offer highly integrated low-cost hardware
solutions for spectrum sensing in cognitive radio (CR) systems. However, the DCR receivers …

Software-defined radio technology is experiencing more and more attention in modern
communication and radar systems. The main practical challenge in deploying such …

Direct-conversion radio receivers can offer highly integrated low-cost hardware solutions for
cognitive radio (CR) devices. Such receivers are, however, also very sensitive to various …

In this paper, we present a novel low-complexity technique, which improves the performance
of single-antenna multi-carrier communication systems, suffering from in-phase and …

We investigate the spectrum sensing problem in a single-input-multiple-output cognitive
radio system under in-phase and quadrature imbalance (IQI). To do this, the received signal …

In the context of Cognitive Radios (CRs), cyclostationary detection of primary users (PUs) is
regarded as a common method for spectrum sensing. Cyclostationary detectors rely on the …

In this paper, we investigate the performance of a spectrum sharing decode-and-forward
multiple-relay network (SSDMN) with direct link under the joint impact of two practical and …

Direct-conversion radio transceivers can offer reprogrammable and low-cost hardware
solutions for full-duplex (FD) cognitive radio networks (CRNs). However, they are …

During the last decades, wireless communications have evolved from a scarce technology,
used by professionals for niche applications to a rapidly advancing research field. Ever …

Inefficient use of radio spectrum is becoming a serious problem as more and more wireless
systems are being developed to operate in crowded spectrum bands. Cognitive radio offers …