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20. A multiplexed telecommunication system is used for a long-distance radio link. Voice signals are multiplexed using S
Posted: Fri Jul 08, 2022 6:24 am
by answerhappygod
- 20 A Multiplexed Telecommunication System Is Used For A Long Distance Radio Link Voice Signals Are Multiplexed Using S 1 (55.52 KiB) Viewed 37 times
20. A multiplexed telecommunication system is used for a long-distance radio link. Voice signals are multiplexed using SSB modulation and the distance between successive subcarriers is equal to fm. Signals at the outputs of the SSB modulators are summed and create a multiplexed low-pass signal used for FM modulation. Compute: a) ratio of noise power in the channel number n and channel number 1 at the output of FM demodulator; b) noise reduction factor for the channel number n. Assume that a single channel in the multiplexed signal takes the whole bandwidth between the subcarriers and the power spectral density of the voice signals is uniform. m (1) *** my(0) 么 SSB modulator G(0) SSB modulator ON (1) BPF transmitter x(t)=s(t)+n(t) Σ receiver FM demodulator m(t) FM modulator v(t)= m(0)+na(Ô) LPF 1 in (t)+no(t) Á s(t) BPF 1 BPF N SSB demodulator SSB demodulator m₂(0 iN(1)