MPSK on OFDM system program Speaker: 沈遠博 1

OUTLINE 1.OFDM system theory. 2.MPSK system simulink. 3.OFDM system simulink. 4.Results comparison. 5.Conclusion. 2

OFDM THEORY 3

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Serial-to- Parallel Converter Signal Mapper IFFT Parallel- to-Serial Converter Guard Interval Insertion Serial Data Input x bits D/A & Low pass Filter Up- Converter Down- Converter A/D Guard Interval Removal Serial-to- Parallel Converter FFT One-tap Equalizer Signal Demapper Parallel- to-Serial Converter Serial Data Output x bits Channel 6

Serial-to- Parallel Converter Signal Mapper IFFT Parallel- to-Serial Converter Guard Interval Insertion Serial Data Input x bits D/A & Low pass Filter Up- Converter Down- Converter A/D Guard Interval Removal Serial-to- Parallel Converter FFT One-tap Equalizer Signal Demapper Parallel- to-Serial Converter Serial Data Output x bits Channel MPSK 7

M-ARY PHASE SHIFT KEYING(M- PSK) M-PSK signal can be represented by this 8

M-ARY PHASE SHIFT KEYING(MPSK) M-PSK 星座圖 9

QPSK 10

8PSK 11

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8PSK 13

QPSK 14

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CONCLUSION 1. The next generation communication system will join OFDM to their system. 2. I’ve made an MPSK simulink program in the OFDM program. 3. If the noise is added we can use some skill to reduce them. 16