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Rate variable COFDM-system with a correction block against channel interferences

Takt-variables COFDM-System mit einem Korrekturblock gegen Kanal-Interferenzen

IEEE Communications Society; Institute of Electrical and Electronics Engineers -IEEE-:
1992 IEEE International Workshop on Intelligent Signal Processing and Communication Systems. Workshop notes : March 19-21, 1992, International Convention Center, Taipei, Taiwan
Taipei, 1992
International Workshop on Intelligent Signal Processing and Communication Systems (ISPACS) <1, 1992, Taipei>
Conference Paper
Fraunhofer IIS A ( IIS) ()
Digitalübertragung; Rundfunktechnik; Codierung; Digitalmodulation; Fehlerhäufigkeit; Fehlerkorrektur; Interferenz; Modelluntersuchung; Mobilfunk

In this paper, the land mobile digital transmission system of high quality music signals with the COFDM (Coded Orthogonally Frequency Division Multiplex) approach is simulated. According to the bit stream structure of the ASPEC (Advanced Spectral Entropy Coder) scheme, a channel coder with the adaptive varying of the coding rate is used, for the implementation a few convolutional codes and punctured convolutional codes are combined. So that the synchronization between signals is ensured and the reconstruction quality of signals is improved. A few comparison results for the different average coding rates are shown. In the simulation of the mobile broadcasting channel two different channel models are used, that is, the Rayleigh process model and the Suzuki process model.