Due to the under-utilization problem of the allocated radio spectrum, cognitive radio (CR)
communications have recently emerged as a reliable and effective solution. Among various …

In critical medical emergency situations, wireless body area network (WBAN) equipped
health monitoring systems treat data packets with critical information regarding patients' …

Transmission over multiple frequency bands combined into one logical channel speeds up
data transfer for wireless networks. On the other hand, the allocation of multiple channels to …

We present the state-of-the-art system level evaluation of the IEEE 802.22-2011 standard
using a highly detailed simulator implementation in NS-2. In the evaluation our attention is …

Multistage sensing is a novel concept that refers to a general class of spectrum sensing
algorithms that divide the sensing process into a number of sequential stages. The number …

Wireless microphones operating in the TV white spaces often appear at specific venues
such as schools or churches, and at specific times. Hence, their location and appearance …

Abstract IEEE 802.22 Wireless Regional Area Networks (WRAN) utilizes the Cognitive
Radio dynamic spectrum access technique in TV bands. When allocating available …

We present results on the system level performance of the IEEE 802.22 standard with
sensing functionality, using a highly detailed implementation of the IEEE 802.22 protocol …

This paper proposes an effective cooperative communication scheme to obtain high
reliability in a long-term evolution-advanced (LTE-A) uplink system. The proposed scheme …

Access to unused spectrum bands of primary networks requires a careful optimization of the
secondary cooperative spectrum sensing, if the transmission powers in the two networks are …