massoud2
Newbie level 4
hi every one i am happy to join this forum
please i have two question
1-
in dvb-t / Mapper: the digital bit sequence is mapped into a base band modulated sequence of complex symbols. There are valid modulation schemes: QPSK, 16-QAM, 64-QAM,256-QAM . what is the frequency of this modulation ? .....Mhz
2- OFDM Modulation: the sequence of blocks is modulated according to the OFDM technique, using 2048, 4096, or 8192 carriers (2k, 4k, 8k mode, respectively). how can generate this carrier with same amplitude and deference frequency ?
please i have two question
1-
in dvb-t / Mapper: the digital bit sequence is mapped into a base band modulated sequence of complex symbols. There are valid modulation schemes: QPSK, 16-QAM, 64-QAM,256-QAM . what is the frequency of this modulation ? .....Mhz
2- OFDM Modulation: the sequence of blocks is modulated according to the OFDM technique, using 2048, 4096, or 8192 carriers (2k, 4k, 8k mode, respectively). how can generate this carrier with same amplitude and deference frequency ?
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