4 2 6 two signals my f and m2 1 both band limited to 5000 hz are to be
Two signals my (f) and m2(1), both band-limited to 5000 Hz, are to be transmitted
simultaneously over a channel by the multiplexing scheme shown in Fig. P4.2-6. The signal
at point b is the multiplexed signal, which now modulates a carrier of frequency 20,000 Hz.
The modulated signal at point c is transmitted over a channel.
(a) Sketch signal spectra at points a, b, and c.
(b) What must be the bandwidth of the distortionless channel?
(e) Design a receiver to recover signals m₁ (1) and m2 (1) from the modulated signal at point c.
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