Viterbi decoding method using channel state information in COFDM system

Author

Weon-Cheol Lee ; Choul-Hee Cho ; Jong-Ho Kwak ; Min-Young Park ; Kyung-Jin Kang

Author_Institution

DTV Res. Lab., LG Electron. Inc., Seoul, South Korea

fYear

1999

fDate

22-24 June 1999

Firstpage

66

Lastpage

67

Abstract

A Viterbi decoder using channel state information (CSI) is presented in a digital terrestrial television broadcasting system. The proposed Viterbi decoder uses the CSI derived from the pilots and CSI is calculated by interpolation method using the pilots in the receiver. We simulated this method in Rayleigh fading defined in ETSI standard. From the simulation, we obtained the results that this method has a better performance of about 0.15 dB to 0.7 dB and 2.2 dB to 2.9 dB in the Rayleigh channel than that of the conventional soft decision Viterbi decoding with or without bit interleaver where the constellation is QPSK, 16-QAM and 64-QAM.

Keywords

OFDM modulation; Rayleigh channels; Viterbi decoding; digital video broadcasting; interpolation; quadrature amplitude modulation; quadrature phase shift keying; 16-QAM; 64-QAM; COFDM system; ETSI standard; QPSK; Rayleigh channel; Rayleigh fading; Viterbi decoding method; bit interleaver; channel state information; constellation; digital terrestrial television broadcasting system; interpolation method; performance; pilots; AWGN; Additive white noise; Channel state information; Decoding; Equations; Gaussian noise; Rayleigh channels; Signal to noise ratio; Transmitters; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Consumer Electronics, 1999. ICCE. International Conference on

Conference_Location

Los Angeles, CA, USA

Print_ISBN

0-7803-5123-1

Type

conf

DOI

10.1109/ICCE.1999.785170

Filename

785170