A transmitter mast send a multimedia signal m(t) with bandwidth of 400 kHz. Its

Question

A transmitter mast send a multimedia signal m(t) with bandwidth of 400 kHz. Its assigned bandwidth is [2.3 MHz, 2.8 MHz]. As shown in the transmitter diagram of Figure P4 5-3, this is achieved by an ideal BPF bandpass fitter HT(f) at the transmitter. Complete the design of the VSB system in Fig. P4.5-3 by specifying the carrier frequency and a detailed receiver system block diagram. For distortionless detection, derive and plot the receiver filter frequency response needed at the front end of the demodulator.

Explanation / Answer

the multiplier multiplies the two signals m(t) and cos(wct) and produce the results as m(t)cos(wct)

the output of multiplier is passed through the BPF the BPF allows the signals in the frequency signals in the range of 2.3MHZ and 2.8MHZ range only

hence the bandwidthe of the resultant signals in 2.8-2.3=0.5MHZ

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