Title :
Viterbi decoding method using channel state information in COFDM system
Author :
Lee, Weon-Cheol ; Park, Hyung-Mo ; Park, Jong-Seok
Author_Institution :
DTV Res. Lab., LG Electron. Inc., Seoul, South Korea
fDate :
8/1/1999 12:00:00 AM
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 the CSI is calculated by an interpolation method using the pilots in the receiver. We simulated this method in Rayleigh fading defined in an ETSI standard (ETI 300 744 (1997)). From the simulation, we obtained the results that this method has the 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 conventional soft decision Viterbi decoding with or without a bit interleaver where constellations are QPSK, 16-QAM and 64-QAM
Keywords :
OFDM modulation; Rayleigh channels; Viterbi decoding; digital television; interpolation; quadrature amplitude modulation; quadrature phase shift keying; television receivers; video signal processing; 0.15 to 2.9 dB; 16-QAM; 64-QAM; COFDM system; CSI; ETI 300 744; ETSI standard; QPSK; Rayleigh fading; Viterbi decoding method; channel state information; digital terrestrial television broadcasting system; interpolation method; performance; pilots; receiver; Bandwidth; Channel state information; Decoding; Euclidean distance; Fading; Interleaved codes; OFDM modulation; Rayleigh channels; System performance; Viterbi algorithm;
Journal_Title :
Consumer Electronics, IEEE Transactions on
