Title :
Pilot and Data Aided Channel Estimation for OFDM systems in Rapidly Time-Varying Channels
Author :
Wee, Jungwook ; Jeon, Wongi ; Lee, Younsung ; Kwon, Kiwon ; Cho, Yongsoo
Author_Institution :
Adv. Mobile Technol. Res. Center, Korea Electron. Technol. Inst., Seoul
Abstract :
In this paper, we propose an efficient estimation technique for time-varying multipath channels by exploiting two dimensional delay-time nature in pilot inserted orthogonal frequency division multiplexing (OFDM) systems. The proposed technique consists of multipath snapshot estimation at periodic channel observation instances over an OFDM block and the linear interpolation of two consecutive multipath snapshots. Two decision-directed data utilizing schemes, data removed and data added correlation schemes, are proposed to enhance the performance of the multipath snapshot estimation.
Keywords :
OFDM modulation; channel estimation; interpolation; multipath channels; time-varying channels; OFDM system; data added correlation scheme; data aided channel estimation; data removed correlation scheme; decision-directed data utilizing scheme; linear interpolation; multipath channel; multipath snapshot estimation; pilot inserted orthogonal frequency division multiplexing system; time-varying channel; AWGN; Channel estimation; Delay estimation; Frequency estimation; Interference; Interpolation; Multipath channels; OFDM; Time domain analysis; Time-varying channels;
Conference_Titel :
Vehicular Technology Conference, 2009. VTC Spring 2009. IEEE 69th
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-2517-4
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2009.5073802
