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Digital Communication: Bandpass Modulation & Demodulation
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Digital Communication: Bandpass Modulation & Demodulation
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25 Questions

1. The relation between the probability of bit error and probability of symbol error in M-ary orthogonal signalling is
2. Which system uses QAM?
3. In amplitude phase keying each phase vector is separated by
4. Which has 50% maximum power efficiency?
5. In non coherent reception _____ is measured.
6. In Binary Phase Shift Keying system, the binary symbols 1 and 0 are represented by carrier with phase shift of
7. Average energy per bit is given by
8. Which FSK has no phase discontinuity?
9. The limit which represents the threshold Eb/N0 value below which reliable communication cannot be maintained is called as
10. The term heterodyning refers to
11. In orthogonal signalling with symbols containing more number of bits we need ____ power.
12. Antipodal signal sets are those vectors that can be illustrated as
13. In On- Off keying, the carrier signal is transmitted with signal value 1 and '0' indicates
14. Energy per symbol Es is given as
15. 49.BPSK system modulates at the rate of
16. Which modulation technique have the same bit and symbol error probability?
17. For FSK signalling, WT is equal to
18. The detection method where carrier'
19. The transformation of the waveform into a single point in signal space is called as
20. In which system, bit stream is portioned into even and odd stream?
21. An amplifier uses ______ to take input signal.
22. In M-ary FSK as M tends to infinity, probability of error tends to
23. As limit of k increases, the ratio of PB/PE becomes
24. The FSK signal which has a gentle shift from one frequency level to another is called as
25. In M-ary FSK, as M increases error