A scenario with two single-user links, one licensed to use the spectral resource (primary)
and one unlicensed (secondary or cognitive), is considered. According to the cognitive radio …

In recent years, the development of intelligent, adaptive wireless devices called cognitive
radios, together with the introduction of secondary spectrum licensing, has led to a new …

In this paper, the performance of cognitive radio systems is studied when the secondary
users operate under statistical quality of service (QoS) constraints. In the cognitive radio …

Inner and outer bounds are established on the capacity region of two‐sender, two‐receiver
interference channels (IC) where one transmitter knows both messages. The transmitter with …

In most of the existing works on cognitive radio (CR) systems, the spectrum sensing and the
cross-layer scheduling are designed separately. Specifically, the sensing module first …

In this paper, we investigate the performance of an amplify-and-forward (AF) cooperative
diversity system with multiple relays in the presence of channel estimation errors. We …

Strong secrecy capacity of compound wiretap channels is studied. The known lower bounds
for the secrecy capacity of compound finite-state memoryless channels under discrete …

A common model for transmission over wireless links is that of a multiantenna system
affected by an additive interfering signal. In some scenarios of interest, such as when the …

In the previous chapter, the benefits, from a theoretical perspective, of cooperative
communications were introduced. In this chapter we expand upon cooperative …

A dirty-paper channel is considered, where the transmitter knows the interference sequence
up to a constant multiplicative factor, known only to the receiver. Lower bounds on the …