1. Which value of r (roll off factor) is considered as Nyquist minimum bandwidth case?

2. A pulse shaping filter should satisfy two requirements. They are

3. Examples of double side band signals are

4. Channel’s phase response must be a linear function of

5. Amplitude distortion occurs when

6. Phase distortion occurs when

7. Equalization process includes

8. The maximum likelihood sequence estimator adjusts _______ according to _____ environment.

9. The filters used with the equalizer is of ______ types.

10. Transversal equalizers are ________ and decision feedback equalizers are ______

11. Symbol spaced has ____ sample per symbol and fractionally spaced has ___ samples per symbol.

12. The _______ of the opening of eye pattern indicates the time over which the sampling for detection might be performed.

13. Range of time difference of the zero crossing gives the value of

14. The range of amplitude difference gives the value of

15. As the eye opens, ISI _______

16. Pseudo noise signal has _______ and _______ SNR for the same peak transmitted power.

17. The index value n, in transversal filter can be used as.

18. The over-determined set of equations can be solved using

19. If the filter’s tap weight remains fixed during transmission of data, then the equalization is called as

20. Equalization method which is done by tracking a slowly time varying channel response is

21. Preamble is used for

22. The disadvantage of preset equalizer is that

23. For AWGN, the noise variance is

24. Performance of BFSK signal is ________ than BPSK.

25. A Gaussian distribution into the non linear envelope detector yields

26. The non coherent FSK needs ________ Eb/N0 than coherent FSK.

27. The DPSK needs ________ Eb/N0 than BPSK.

28. Coherent PSK and non coherent orthogonal FSK have a difference of ______ in PB.

29. Which is easier to implement and is preferred?

30. Which is the main system consideration?

31. Wavelength and antenna size are related as

32. The detection method where carrier’s phase is given importance is called as

33. The coherent modulation techniques are

34. The real part of a sinusoid carrier wave is called as

35. Antipodal signal sets are those vectors that can be illustrated as

36. The FSK signal which has a gentle shift from one frequency level to another is called as

37. Which modulation scheme is also called as on-off keying method?

38. In amplitude phase keying each phase vector is separated by

39. The transformation of the waveform into a single point in signal space is called as

40. The correlating detector is also known as

41. The minimum nyquist sampling rate is given as, fs =

42. Phase-locked loop circuitry is used for

43. In differential PSK the date is

44. Envelope detector consists of

45. The minimum required spacing is the difference between the

46. The minimum tone separation corresponds to

47. Matched filter is used for

48. In differential encoding the _________ different between two wave forms is measured.

49. The error probability of DPSK is ________ worse than PSK.

50. The limit which represents the threshold Eb/N0 value below which reliable communication cannot be maintained is called as