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- W858217226 abstract "This paper is the concerning about the performance analysis of demapper which use the scattered pilot signals inserted in transmission part in COFDM(Coded Orthogonal Frequency Division Multiplexing) system that is the standard transmission system of digital terrestrial broadcasting. The digital data to be transmitted are mapped according to the mapping method which is depend on the constellation in transmission part and are demapped according to the distance difference between transmitted point in constellation diagram. In receiver part, at first, the scattered pilots are extracted in pilot extractor block and extracted scattered pilots are interpolated in time direction and in frequency direction respectively. By the interpolation the scattered pilot signals channel state information(csi) is deriver and this information is used in demapper block. This paper was simulated above method in Rayleigh and Ricean fading 20 multi-path channel that is the defined in ETS 300 744. From the simulation results, we obtained the 2.5~3dB better performance in Rayleigh fading and 0.5dB in Ricean fading without the changing of the Viterbi decoder structure in comparison with the conventional soft decision demapping method so concluded that this papers method is very efficient and be used in OFDM IC." @default.
- W858217226 created "2016-06-24" @default.
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- W858217226 date "1999-01-01" @default.
- W858217226 modified "2023-09-24" @default.
- W858217226 title "Performance Anaysis of Demmapper using Channel State Information in DVB-T System" @default.
- W858217226 hasPublicationYear "1999" @default.
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