We consider a parallel multiple-input multiple-output (MIMO) relay network, in which a
source node communicates with a destination node assisted by multiple parallel relays. In …

Cooperative relay technologies are currently being researched to address the ever-
increasing demand for higher data rates, extended coverage, greater mobility, and …

For the sixth category of multipoint cooperative communication technology, we address the
relay/antenna selection schemes for the amplify-and-forward (AF) multiple-input multiple …

In the multiple-input and multiple-output relay system, distributed spatial-temporal precoding
(DSTP) has been proven to be capable of improving the system reliability and capacity with …

High data rate, reliability and secrecy are fundamental pursuits in wireless communications
systems. A multi-user wireless environment is particularly challenging because of …

Η παρούσα διδακτορική διατριβή πραγματεύεται την ανάπτυξη και αξιολόγηση μοντέλων
διαύλου τεχνολογίας ΜΙΜΟ για ευρυζωνικά ασύρματα συστήματα επικοινωνιών βασισμένα σε …

High altitude platforms (HAPs) are one of the most promising alternative infrastructures for
realizing next generation high data-rate wireless communications networks. Considering the …

A new precoder that reduces the feedback overhead in an OFDM-based relay network is
proposed. A joint Singular Value Decomposition (SVD) and QR Decomposition is employed …

Οι στρατοσφαιρικές πλατφόρμες (high altitude platforms-HAPs) αποτελούν μία από τις πολλά
υποσχόμενες εναλλακτικές τεχνολογίες για τη δημιουργία ασύρματων δικτύων υψηλών …