Title :
Pilot tone selection in OFDM amplified-and-forward relay system
Author :
An, Linfeng ; Chen, Ming ; Wu, Bingyang
Author_Institution :
Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China
Abstract :
Channel estimation for OFDM amplify-and-forward relay system requires transmission of pilot tones in source node, and different pilot tones can be derived according to different channel estimation algorithms and OFDM scenarios. This paper derives two different pilot tones with different scenarios: 1) no virtual subcarrier is applied in OFDM system and LS algorithm is used in channel estimation; 2) virtual subcarriers are applied in OFDM system and RLS algorithm is used in channel estimation.
Keywords :
OFDM modulation; amplify and forward communication; channel estimation; least squares approximations; LS algorithm; OFDM amplified-and-forward relay system; RLS algorithm; channel estimation algorithm; orthogonal frequency division multiplexing; pilot tone selection; pilot tone transmission; source node; virtual subcarriers; Channel estimation; Mobile communication; Noise; OFDM; Relays; Time domain analysis; Vectors; LS; OFDM; RLS; pilot tone; relay; virtual subcarrier;
Conference_Titel :
Wireless Communications and Signal Processing (WCSP), 2011 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4577-1009-4
Electronic_ISBN :
978-1-4577-1008-7
DOI :
10.1109/WCSP.2011.6096783
