A derivation on the equivalence between newton´s method and DF DFT-based method for channel estimation in OFDM systems

Author

Ku, Meng-Lin ; Huang, Chia-Chi

Author_Institution

Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu

Volume

7

Issue

10

fYear

2008

fDate

10/1/2008 12:00:00 AM

Firstpage

3982

Lastpage

3987

Abstract

In this paper, we derive the decision-feedback (DF) discrete Fourier transform (DFT)-based channel estimation method from Newton´s method for space-time block code (STBC)/ orthogonal frequency division multiplexing (OFDM) systems. Through our derivation, the equivalence between Newton´s method and the DF DFT-based method is established. Computer simulations are also used to demonstrate the equivalence of the two methods in terms of BER and normalized square error (NSE) performance. Finally, the results presented in this paper also hold for conventional OFDM systems.

Keywords

Newton method; OFDM modulation; automatic repeat request; block codes; channel estimation; discrete Fourier transforms; space-time codes; DF DFT-based method; Newton method; OFDM systems; channel estimation; decision feedback discrete Fourier transform; normalized square error; orthogonal frequency division multiplexing; space-time block code; Block codes; Channel estimation; Computer simulation; Demodulation; Digital modulation; Discrete Fourier transforms; Frequency estimation; Maximum likelihood estimation; Newton method; OFDM modulation; Orthogonal frequency division multiplexing, space-time block code, discrete Fourier transform, channel estimation, Newton´s method, decision-feedback;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/T-WC.2008.070583

Filename

4657342