Title :
Alternate versus simultaneous relaying in MIMO cellular relay networks: A degrees of freedom study
Author :
Salah, Aya ; El-Keyi, Amr ; Nafie, Mohammed
Author_Institution :
Wireless Intell. Networks Center (WINC), Nile Univ., Cairo, Egypt
Abstract :
In this paper, a two-hop cellular relay network consisting of two source-destination pairs equipped with M antennas is considered where each source is assisted by two decode-and-forward relays operating in half-duplex mode and the relays are equipped with N antennas. The DoF of the system is investigated for both simultaneous and alternate relaying configurations. For each relay configuration, an outer bound on the degrees of freedom (DoF) is developed. A new achievable scheme is proposed that meets the upper bound on the maximum DoF for all values of M andN except for M <; N <; 5M/2.
Keywords :
MIMO communication; cellular radio; decode and forward communication; relay networks (telecommunication); DoF; MIMO cellular relay networks; alternate relaying configurations; decode-and-forward relays; degrees of freedom; half-duplex mode; simultaneous relaying configurations; source-destination pairs; two-hop cellular relay network; Antennas; Base stations; Interference; MIMO; Protocols; Relays; Upper bound;
Conference_Titel :
Signals, Systems and Computers, 2014 48th Asilomar Conference on
Print_ISBN :
978-1-4799-8295-0
DOI :
10.1109/ACSSC.2014.7094434
