Assignment-1_MM (1)

5 a) Consider the sample sequence (5000, 5000, 5000, 5000, -5000, -5000, -5000, -5000}. These are samples of a square wave with a period of eight samples or 1ms at 16 KHz sampling frequency. What are the sinusoidal frequencies in the output waveform?

For an FM signal, the maximum frequency of the modulating signal is 100 kHz and the frequency deviation is 10 kHz. Find out the bandwidth of the FM modulated waveform.

The subject is Communication Systems ( FREQUENCY MODULATION (FM) AND DEMODULATION ) Please send the answer by typing i don't want any handretten.   Q 01) What are the applications of FM? Define frequency deviation in FM? What are the advantages of FM over AM?

7-24

The plot below shows a sampled continuous signal, with red dots indicating sample points. Determine if the signal has been sampled appropriately, so as to avoid aliasing. For the case where the signal has not been sampled appropriately determine the aliased frequency and enter the result in the answer field below (enter a numerical value only +- 5% tolerance). For the case where the signal has been sampled sufficiently enter the sampling frequency. Amplitude 30 20 10 0 -10 -20 -30 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 Time (seconds)

Consider the following continous time signal x(t).  Assume that the signal was sampled at a sampling frequency of 20 Hz.  Plot the magnitude spectrum of the sampled signal as a function of cyclic frequency. Be sure to include n values of up to +-2. Label x and y axis.  Did aliasing occur? If so, what is the aliased frequency? x(t) = 1 + 2cos(2pi25t)