In this paper, we consider the robust secure beamformer design for multiple-input-single-
output wiretap channels. Assuming that the eavesdroppers' channels are only partially …

Energy efficiency (EE) is very crucial for future wireless communication systems, especially
for cognitive radio networks (CRNs). The EE performance relies on channel state …

We develop robust resource-allocation schemes for a cognitive radio network (CRN), where
the secondary users (SUs) try to communicate with each other from different small cell …

Transmitter power consumption and application throughput in cognitive radio-medium
access control (CR-MAC) protocol has direct impact on control message overhead and …

In cognitive relay networks, the interferences from secondary users (SUs) and relays to
primary users are constrained to be lower than a threshold. The interference constraints are …

We propose a robust beamforming design for underlay cognitive radio networks where
multiple secondary transmitters communicate with corresponding secondary receivers and …

In this paper, the robust transceiver design for multi-cell distributed antenna systems is
investigated, which is of great importance for the future mobile communication network …

We consider a cognitive radio (CR) relay network consisting of a cognitive source, a
cognitive destination and a number of cognitive relay nodes that share spectrum with a …

A robust transmit beamforming scheme is proposed for green cognitive radio networks in
presence of incorrect steering vector estimations. The beamformer is designed using a …

The authors study robust beamforming and power allocation in cognitive relay networks
using several relays in the secondary link. The channel state information is imperfect …