-. A single toned message, m(t) = 4 sin (2 x100t), where time measured in seconds, is amplitude modulated onto a carrier

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A Single Toned Message M T 4 Sin 2 X100t Where Time Measured In Seconds Is Amplitude Modulated Onto A Carrier 1 (88.63 KiB) Viewed 14 times

-. A single toned message, m(t) = 4 sin (2 x100t), where time measured in seconds, is amplitude modulated onto a carrier c(t) = 20 cos(@t). The carrier frequency is fo=15 kHz. i. Sketch a diagram of a scheme to achieve this DSB-FC modulation. Include numerical values for any gains used. [3 marks] ii. What is the power in the modulated signal? [1 mark] ii. The signal is to be demodulated using a Coherent detector. Sketch a block diagram showing a Coherent detector. [2 marks] A DSB-SC signal, s(t)= 4 m(t)cos(at), with a message bandwidth of W, is transmitted over AWGN channel with two-sided noise power spectral density of No 2 - i. Write an expression for the transmitted power. [1 mark] ii. Derive an expression for the signal-to-noise ratio (SNR) on the channel. [2 marks] iii. What is AWGN channel? [1 mark] i) Briefly describe two methods that can be used to generate Wideband FM. [2 marks] ii) Explain with appropriate spectrum diagram(s) how VSB is generated from DSB-SC waveform. [3 marks]