Description: Abs tra c t: A f ter a band pass f ilter, QDPSK signal′ s symbo l can be divided into steady sect i on and t ransit i on sect i on, so the
demodulat i on and synch ronizat i on fo r th is signal can be realized w ith DFT 1 In such a digital demodulato r, it is i mpo r tant to design a
p roper band pass f ilter to get r id of side beam pow er effect ively and don′ t change the w avefo rm in steady sect i on1 Th is paper
int roduces the scheme select i on, parameter design method and si mulate effect fo r th is f ilter based onM at lab1
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