Communication Systems Preparation Part 2 In radar systems PRF stands for PRF in radar systems means pulse repetition frequency. Which of the following cannot be the Fourier series expansion of a periodic signal? x(t) = cos t + 0.5 not satisfies the Dirichlet condition. The integration of constant term is ∞ Which of the following is the indirect way of FM generation? Armstrong modulator generates FM through phase modulation. A telephone exchange has 9000 subscribers. If the number of calls originating at peak time is 10, 000 in one hour, the calling rate is 10/9. Calling rate is the number of calls per subscriber. If C is capacity of noisy channel, (bits/s), δf is bandwidth Hz and S/N is signal to noise ratio, then bandwidth multiply by sum of 1 and signal to noise ratio As the frequency increases, the absorption of ground wave by earth's surface Increases. Because of this...
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