Question: a) What is the modulation techniques combined in QAM? b) Can the BPSK signal be noncoherently detected? c) Consider FSK system with the following transmitted

a) What is the modulation techniques combined in QAM? b) Can

a) What is the modulation techniques combined in QAM? b) Can the BPSK signal be noncoherently detected? c) Consider FSK system with the following transmitted signals S1(t)=cos(21100t) and S2(t)=cos(21000t). The bit rate is 100b/s. What is the value of the carrier frequency and the frequency deviation

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