Wireless and Mobile Communications Practice Test 5

1. In QAM, the amplitude is _______ and phase is _______

2. QPSK provides twice the bandwidth efficiency and _______ energy efficiency as compared to BPSK.

3. ISI is ________ by increasing channel bandwidth.

4. In DPSK system, input signal is differentially encoded and then modulated using a ________ modulator.

5. Which of the following is defined as the range of frequencies over which the signal has a non zero power spectral density?

6. Modern mobile communication systems use analog modulation techniques.

7. The performance of modulation scheme is not measured in terms of __________

8. How is the performance of SSB AM systems in fading channels?

9. A product detector in AM systems is also called ___________

10. The name minimum phase shift keying implies minimum _________