Title :
Achievable Degrees of Freedom of MIMO Y Channel With Delayed CSIT
Author :
Qingyun Li ; Hongxiang Li ; Gang Wu ; Xinping Yi ; Bing Zhou ; Weiyao Lin ; Shaoqian Li
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this letter, we study the degrees of freedom (DOF) for multiple-input-multiple-output (MIMO) Y channel in frequency division duplex (FDD) systems. Assuming each node has delayed channel state information at the transmitter (CSIT), we propose a physical layer network coding multi-stage transmission (PLNC-MST) scheme during broadcast (BC) phase. The results show that PLNC offers significant DOF gain in MIMO Y channel.
Keywords :
MIMO communication; broadcast channels; frequency division multiplexing; network coding; radio transmitters; wireless channels; DOF; FDD; MIMO Y channel; PLNC-MST; broadcast phase; degrees of freedom; delayed CSIT; delayed channel state information at the transmitter; frequency division duplex systems; multiple-input-multiple-output; physical layer network coding multistage transmission scheme; Antennas; Channel state information; Equations; MIMO; Network coding; Relays; Vectors; Degrees of freedom (DOF); channel state information (CSI); interference alignment (IA); network coding;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2014.2344665
