Digital Communication Unit 3
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This document discusses various digital modulation techniques including binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), offset QPSK, frequency-shift keying (FSK), and minimum-shift keying (MSK). It covers topics such as the generation and detection of BPSK and QPSK signals, their error probabilities and power spectra, and the implementation of MSK transmitters and receivers.
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Digital Communication Unit 3
- 3. GENERATION AND DETECTION OF BPSK
- 4. ERROR PROBABILITY OF BPSK
- 6. POWER SPECTRA OF BPSK
- 10. GENERATION OF QPSK SIGNALS
- 11. DETECTION OF QPSK SIGNALS
- 12. ERROR PROBABILITY OF QPSK
- 13. POWER SPECTRA OF QPSK SIGNALS
- 14. OFFSET QPSK Fig. Possible paths for switching between the message points in (a) QPSK and (b) offset QPSK.
- 18. MINIMUM SHIFT KEYING (concept)
- 20. Phase trellis
- 21. Fig.: Phase trellis boldfaced path represents the sequence 1101000.
- 27. MSK TRANSMITTER
- 28. MSK RECEIVER