Title :
Adjustable Comb-Type Pilot Arrangement in Wireless OFDM
Author :
Hu, Chia-Chang ; Chen, Fu-How
Author_Institution :
Dept. of Commun. Eng., Nat. Chung Cheng Univ., Chiayi
Abstract :
An adaptive pilot-symbol assignment scheme is proposed for interpolation-based channel estimation in wireless orthogonal frequency division multiplexing (OFDM) communication systems. The channel transfer functions of data tones are interpolated by the piecewise-linear and the second-order polynomial methods due to their inherent simplicity. Simulations are conducted to demonstrate both system performance and bandwidth (BW) superiority and to provide a comparative evaluation of the proposed scheme with conventional fixed pilot-symbol channel estimation schemes.
Keywords :
OFDM modulation; channel estimation; interpolation; polynomial approximation; radio networks; transfer functions; adaptive pilot-symbol assignment scheme; adjustable comb-type pilot arrangement; bandwidth superiority; channel transfer functions; fixed pilot-symbol channel estimation schemes; interpolation-based channel estimation; orthogonal frequency division multiplexing; piecewise-linear methods; second-order polynomial methods; wireless OFDM; Bandwidth; Bit error rate; Channel estimation; Digital video broadcasting; Fading; Interpolation; Maximum likelihood estimation; OFDM; Polynomials; Transfer functions;
Conference_Titel :
Vehicular Technology Conference, 2008. VTC 2008-Fall. IEEE 68th
Conference_Location :
Calgary, BC
Print_ISBN :
978-1-4244-1721-6
Electronic_ISBN :
1090-3038
DOI :
10.1109/VETECF.2008.231
