[Legacy Report] Seminar by IT Chapter

---

A talk by Prof. Aria Nosratinia,
University of Texas at Dallas

Title: Recovering the Multiplexing Loss of Half-Duplex Relaying via Spectrally Efficient Relay Selection

Abstract: This talk addresses one of the main issues in half-duplex relay systems: the well-known multiplexing loss due to the causality of relays. We propose relay selection
methods to recover the multiplexing loss in decode-and-forward (DF) relay networks. A key feature of this work is that the interference of relays on each other are fully
taken into account. Two network topologies are studied: relaying with and without direct source-destination links. For the former topology we design relay selection
methods that achieve the MISO upper bound on the Diversity-Multiplexing Tradeoff (DMT) with very little feedback and no carrier synchronization requirements. For the
latter topology we propose non-orthogonal DF methods that feature an unequal error protection ability via an embedded family of DMT curves. Even considering the
latter method\'s minimal DMT, a marked improvement over previous DF methods is observed, especially in high spectral efficiencies. By addressing one of the most
prominent drawbacks of relay systems, it is hoped that this work will pave the way to a more widespread acceptance of the usage of DF relays in communication
networks.

---

---

---

---