In this paper, we consider the problem of spectrum sensing by using multiple antenna in
cognitive radios when the noise and the primary user signal are assumed as independent …

The paper presents a review of the scientific literature dealing with the wideband detection
of signals. Such problem is critical in Cognitive Radios (CRs), as it allows identifying the …

Dynamic spectrum access (DSA) is a promising approach for the more effective use of
existing spectrum. Of fundamental importance to DSA is the need for fast and reliable …

Cognitive radio has been an active research area in wireless communications over the past
10 years. TV Digital Switch Over resulted in new regulatory regimes, which offer the first …

In this paper we investigated the energy detection technique for spectrum sensing in
cognitive radio systems. The detection performance and the impact of the noise uncertainty …

Cognitive radio (CR) is a promising technology for overcoming the lack of available
communication bands. In CR technology, spectrum sensing is an important issue, which has …

The policy of permanently assigning a frequency band to a single application has led to
extremely low utilization of the available spectrum. Cognitive radio, with its ability to be both …

Cooperative spectrum sensing has recently become an important research topic for
cognitive radio systems because it solves the hidden terminal problem in single-user …

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 …

The paper presents a review of the measurement methods and the technologies for
wideband spectrum sensing. Wideband spectrum sensing is a relevant task in RF …