Title :
Pilot-Aided Channel Estimation Techniques in OFDM System
Author :
Chunlong, He ; Li, Hao
Author_Institution :
Sch. of Inf. Sci. & Technol., Southwest Jiaotong Univ., Chengdu
Abstract :
The channel estimation techniques for OFDM systems based on pilot-aided are investigated. In view of the contradiction of LS and MMSE estimators between performance and computational complexity, two simplified estimator for LS and MMSE were presented. The simulation results show that the simplified estimator algorithm has preferable performance and lower complexity. In addition, we compared the BER performance of the constant interpolation, linear interpolation, second order interpolation and time domain interpolation algorithms based on comb-type pilot. The simulation results show that the time domain interpolation performs the best among all channel interpolation algorithms.
Keywords :
OFDM modulation; channel estimation; error statistics; interpolation; least mean squares methods; time-domain analysis; BER performance; LS estimation; MMSE estimator; OFDM system; comb-type pilot; linear interpolation; pilot-aided channel estimation technique; second order interpolation; time domain interpolation; AWGN; Channel estimation; Communication system software; Digital video broadcasting; Fading; Frequency conversion; Frequency estimation; Information science; Interpolation; OFDM; LS; MMSE; OFDM; channel estimation; time domain interpolation;
Conference_Titel :
Communication Software and Networks, 2009. ICCSN '09. International Conference on
Conference_Location :
Macau
Print_ISBN :
978-0-7695-3522-7
DOI :
10.1109/ICCSN.2009.23
