Title :
Optimal subchannel assignment in a two-hop OFDM relay
Author :
Hottinen, Ari ; Heikkinen, Tiina
Author_Institution :
Nokia Group, Espoo
Abstract :
The paper studies subchannel assignment in a two-hop OFDM relay system in which the transmitting nodes (source and relay) have access to channel information and interference-related information. We show that with L-superadditive relay (performance) functions a simple ranking of subchannels leads to the optimal assignment with a very low computational complexity. Numerical results quantify the benefit of subchannel assignment in a frequency-selective channel.
Keywords :
OFDM modulation; channel allocation; computational complexity; fading channels; optimisation; L-superadditive relay performance functions; channel information; computational complexity; frequency-selective channel; interference-related information; optimal assignment; optimal subchannel assignment; two-hop OFDM relay; Computational complexity; Computer science; Convolution; Finite impulse response filter; Heuristic algorithms; Interference; OFDM; Radio communication; Relays; Transmitters;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2007. SPAWC 2007. IEEE 8th Workshop on
Conference_Location :
Helsinki
Print_ISBN :
978-1-4244-0955-6
Electronic_ISBN :
978-1-4244-0955-6
DOI :
10.1109/SPAWC.2007.4401425
