| 1. |
Consider a signal  with its Hilbert Transform  .Show that the correlation function  .
|
| (20%) |
| 2. | Draw block diagrams for (a) binary FSK transmitter. (b) Coherent binary FSK receiver, and (c) Non-coherent binary FSK receiver. |
| (20%) |
| 3. |  |
Consider a convolutional encoder shown in Fig. 1. Find
(a) The generator polynomial.
(b) The output polynomial if the input polynomial is  .
(c) The encoder sequence.
|
| (20%) |
| 4. | (a) | An AM Modulator has output
 .
Determine the modulation index, the equation for  and the efficient.
|
| (15%) | ||
| (b) | A transmitter uses a carrier frequency of 1000 Hz. Determine both the phase and frequency deviation for the
transmitter output
| |
| (10%) |
| 5. | A pseudo-noise sequence is generated using a feedback shift register of length m=4. The chip rate is 107 chips per second. Find the following parameters (a)PN sequency length. (b)Chip duration of the PN sequency (c)PN sequence period. |
| (15%) |