1. Diversity and Error Compensation in OFDM Transceivers: Principles and Implementation
Fire Tom Wada
Professor, Information Engineering, Univ. of the Ryukyus
Chief Scientist at Magna Design Net, Inc
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Fire Tom Wada, Univ. of the Ryukyus

2. Section 1 OFDM transceivers: Principles and design 3/25/2020
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3. 18.2.1 Single Carrier vs. Multi Carrier
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4. 18.2.2 OFDM signal generation (1)
Orthogonal relations
One subcarrier signal
Baseband OFDM signal
Complex baseband OFDM signal
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5. OFDM signal generation (2)
Sampled by N points
Passband signal
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6. OFDM Transmitter Block Diagram
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7. 18.2.3 OFDM signal reception (1)
Passband signal
Direct down conversion
Applying the low pass filter
Another direct conversion
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8. OFDM signal reception (2)
Combining SI(t) and SQ(t)
Sampling
IDFT operation
DFT operation
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9. Simple OFDM Receiver Block Diagram
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10. Multipath channel
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11. Guard Interval
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12. 18.2.5 Channel Estimation and Equalizer
Reception signal sR(t)
CTF
Frequency domain
Equalization
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13. 18.2.6 OFDM communication and broadcasting systems
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14. Synchronization Radio frequency (RF) synchronization
Sampling rate synchronization
Symbol timing (FFT window position) synchronization
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15. OFDM communication and broadcasting system
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16. OFDM WLAN design
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17. WLAN frame format and receiver tasks
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18. WLAN Block Diagram
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19. 18.2.8 OFDMA transceiver design
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20. TDD Frame and GAP
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21. simplified OFDMA and SC-FDMA
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22. Base Station TX and RX
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23. User Terminal TX and RX
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24. Section 3 Error Detection and Compensation 3/25/2020
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25. 18.4.1 Time domain RF error detection and compensation
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26. Time domain RF error compensation feedback
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27. 18.4.2 Time domain FFT window position detection and RF error detection
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28. 18.4.3 Time domain RF error, sampling error, and symbol timing detection and compensation
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29. Time domain RF error and sampling clock error compensation
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30. 18.4.4 Frequency domain RF error and sampling error detection
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31. Frequency domain RF error and sampling error detection (2)
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32. 18.4.5 Delay profile detection and frequency domain FFT position detection
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33. 18.4.6 FFT window shift detection by constellation rotation and compensation
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34. Section 4 Hardware Implementation and System Integration 3/25/2020
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35. 18.5.1 Four antenna adaptive array combiner LSI
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36. Four antenna adaptive array combiner LSI (2)
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37. 18.5.2 A 2/4/8 Antennas Configurable Diversity OFDM Receiver LSI
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38. A 2/4/8 Antennas Configurable Diversity OFDM Receiver LSI (2)
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39. 18.5.3 Joint Hardware-Software Implementation of Adaptive array antenna OFDM receiver by FPGA
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40. Joint Hardware-Software Implementation of Adaptive array antenna OFDM receiver by FPGA (2)
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41. Joint Hardware-Software Implementation of Adaptive array antenna OFDM receiver by FPGA (3)
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42. 3.2.4 Hybrid Pre-FFT Adaptive Array Antenna and Post-FFT Space Diversity Combining for Mobile ISDB-T Receiver by FPGA
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43. System configurations A and B
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44. Hybrid Pre-FFT Adaptive Array Antenna and Post-FFT Space Diversity Combining for Mobile ISDB-T Receiver by FPGA (3)
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45. Conclusion In section 1 In section 3
Basic OFDM equations are reviewed
3 key synchronization
Architecture examples
In section 3
Synchronization error detection and compensations
Time domain & Frequency domain
In section 4, Some real design examples
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