1 A The Magnitude Spectrum Of A Cosine Tone Modulated Fm Frequency Modulation Signal Is Shown In Figure Q1 A The S 1 (33.01 KiB) Viewed 32 times
1 A The Magnitude Spectrum Of A Cosine Tone Modulated Fm Frequency Modulation Signal Is Shown In Figure Q1 A The S 2 (28.29 KiB) Viewed 32 times
1. a) The magnitude spectrum of a cosine tone modulated FM (frequency modulation) signal is shown in Figure Q1(a). The spectrum only shows the significant sidebands within the bandwidth as per Carson's rule. The frequency deviation per volt of the FM signal is 5 x 102HzV-1 J.Vc(volt) 11.6 Luulin 4.4 2.6 940 -f(kHz) 960 1020 1040 1060 980 1000 Figure Q1(a) *Note: Only the positive frequency portion of the spectrum is shown i. Analyse the magnitude spectrum to obtain the audio signal. [12 marks]
ii. Produce the FM expression in time domain based on the magnitude spectrum [4 marks) iii. Calculate the percentage of the total FM signal power that lies within the Carson's rule bandwidth. [6 marks) iv. Compute bandwidth (using Bessel function) and frequency deviation of the FM signal. [6 marks) b) Describe one advantages of Frequency Modulation (FM) over Amplitude Modulation (AM) [2 marks]
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