The author presents a unified treatment of this highly interdisciplinary topic to help define the
notion of cognitive radio. The book begins with addressing issues such as the fundamental …

A broadband digital beamforming algorithm is proposed for directional filtering of temporally-
broadband bandpass space-time plane-waves at radio frequencies (RFs). The …

In this study, the authors consider the problem of distributed relay beamforming in an
underlay-based cognitive relay network in which a secondary network transmits its data …

This paper considers the spectrum sharing multiple-input multiple-output (MIMO) cognitive
radio network, in which single primary user (PU) coexists with multiple secondary users …

In this paper, we design downlink (DL) beam-forming vectors for a multiuser multicell
cognitive radio (CR) network with imperfect channel state information (CSI) at base stations …

A broadband digital beamforming algorithm is proposed for directional filtering of temporally-
broadband bandpass space-time (ST) plane-waves (PWs) at radio frequencies (RFs). The …

In this study, the authors consider the problem of distributed relay beamforming in an
underlay-based cognitive relay network in which a secondary network transmits its data …

In modern wireless communication systems, the per-user data rate demand is constantly
growing. To sustain the heavy user data rate demand, network operators try to deploy …

The ever shrinking cell sizes to accommodate more users make the performance of wireless
cellular networks interference limited. To mitigate inter-cell interference in downlink …

We consider multiple peer-to-peer secondary users that are assisted by multiple multi-
antenna relays for mitigating spatial interference and forwarding signals. We propose a joint …