Title :
An Adaptive MIMO-OFDMA Relay System
Author :
Munoz, Daniel ; Xie, Baile ; Minn, Hlaing
Author_Institution :
Dept. of Electr. Eng., Univ. of Texas at Dallas, Dallas, TX, USA
fDate :
10/1/2012 12:00:00 AM
Abstract :
We consider multi-input multi-output (MIMO) antennas relay systems under time-varying channels and propose a joint relay, antenna, subband, and MIMO transmission mode adaptation scheme which enables antenna selection to exploit channel state information (CSI) at the beginning of transmission and switch to space-frequency block coding (SFBC) when CSI becomes outdated. Moreover, we propose temporal power and bit loading for the cascaded source-relay-destination link with/without inter-hop power allocation to further enhance the system performance.
Keywords :
MIMO communication; OFDM modulation; adaptive antenna arrays; block codes; channel coding; frequency division multiple access; time-varying channels; CSI; MIMO transmission mode adaptation scheme; SFBC; adaptive MIMO-OFDMA relay system; antenna selection; bit loading; cascaded source-relay-destination link; channel state information; interhop power allocation; joint relay; multiinput multioutput antenna relay systems; space-frequency block coding; temporal power; time-varying channels; Bit error rate; Delay; Loading; MIMO; OFDM; Relays; Signal to noise ratio; Relay; adaptive transmission; time-varying;
Journal_Title :
Wireless Communications Letters, IEEE
DOI :
10.1109/WCL.2012.071612.120357
