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Ali Al- Saihati ID# 200350130

King Fahd University of Petroleum & Minerals  Electrical Engineering Department EE 578 Simulation of Wireless Systems PSK Based Digital Transmission Schemes Assignment # 3 . Ali Al- Saihati ID# 200350130. OUTLINE. Introduction. BPSK. QPSK. OQPSK. MSK. GMSK QAM. Introduction.

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Ali Al- Saihati ID# 200350130

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  1. King Fahd University of Petroleum & Minerals Electrical Engineering DepartmentEE 578 Simulation of Wireless SystemsPSK Based Digital Transmission Schemes Assignment # 3 Ali Al-Saihati ID# 200350130

  2. OUTLINE • Introduction. • BPSK. • QPSK. • OQPSK. • MSK. • GMSK • QAM

  3. Introduction • Signal Waveform: S(t)= A cos {2πfct + Ѳ(t)} • QPSK has better transmission rate than BPSK . • QPSK doesn’t achieve high BW efficiency.

  4. BPSK • Input data of 0 & 1 are converted to phases 0 & π. • Waveform signal: S(t)= A cos {2πfct +π dk} • dkis the information data sequence.

  5. Nyquist Filter

  6. Channel Compensation • Channel compensation at transmitter and receiver.

  7. Results

  8. BER Performance

  9. QPSK • Generated by two BPSK signals. • Uses two orthogonal carrier signals (cos 2πfct, sin 2πfct) . • Signal: • dk is converted into parallel data.

  10. Transmitter & Receiver

  11. Results

  12. OQPSK • Has 4 states for I & Q: (1,1), (1,-1), (-1,1), (-1,-1). • Same QPSK configuration but with different mapping circuit. • Signal: • BER same as QPSK.

  13. Mapping

  14. Results

  15. MSK • Amplitude is weighted to eliminate fluctuation in amplitude. • Weighting function for I is cos (πt/ 2Tb) and Q is sin (πt/ 2Tb). • Singnal: • BER same as QPSK.

  16. Mapping

  17. Results

  18. GMSK • Used in GSM mobile phone system. • Amplitude is constant. • Keeps the transition phase smooth at kTb.

  19. Mapping

  20. Results

  21. QAM • Signal: • BER M=16:

  22. Results

  23. Thank You

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