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Demodulator conforming ISDB-T Standard

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AiraChrisXette

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Good day. We are conducting some research about digital signal receiver and we are focusing on the demodulator part. Here are some concerns regarding the research topic :
What are the possible testings for a demodulator for a digital tv receiver conforming to the ISDB-T Standard?
How will I choose the best demodulation technique (QPSK, 16 QAM, 64QAM, DQPSK)?
Is it really impossible to use the 128 QAM? Why?
What are the problems on the existing demodulator?

Your answers will be much appreciated. Thank you.
 

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