Question

The following is the channel frequency assignment for a 12-channel AM radio system: (c) Channel No Fcy 1240 kHz 1370 kHz 500 kHz 1630 kHz Channel No.Frequency 2280 kHz 2410 kHz 2540 kHz 2670 kHz Channel No. Freqency 1760 kHz 1890 kHz 2020 kHz 2150 kHz 10 2 12 When the AM superheterodyne radio receiver is tuned to Channel 10, in addition to the signal carried on Channel 10, you can also hear a weak signal carried on Channel3 (i) Determine the value of the Intermediate frequency (IF) in this system (in Hz). (ii) Suggest a feasible value of the IF frequency (in Hz) such that all channels in this radio system will be free from this kind of interference from other channels (d) A signal, x(), with power spectral density Srd) = 4f2 (in W/Hz), for-w fs w(in Hz) is transmitted through a baseband communication channel with white noise, Sn(0- 2 . The signal plus noise is passed through an ideal lowpass filter with cutoff frequency W. Express the signal-to-noise ratio (SNR) at the output of the filter, in terms ofA, W, and η

Answer 1

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