Q: An audio signal transmitted from a radio station has a bandwidth of 10kHz is passed through a Band Pass Filter with a centre frequency of 1000 MHz after getting multiplied by cos wct to produce Xc(t):I- Sketch the spectrum at each point.II- Find the value of wc, if you know that the carrier frequency is only 20% of Xc(t) bandwidth.III- Is there any type of modulation you studied corresponds to this modulator.IV- What will occur when remove the BPF (the Band Pass Filter).V- Suggest a method to regenerate the audio signal at the receiver radio (Car, House…etc.).
