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OFDM??????PAPR????

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Title: OFDM PAPR Author: ffl Last modified by: ffl Created Date: 12/22/2004 2:11:00 AM Document presentation format: – PowerPoint PPT presentation

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Title: OFDM??????PAPR????


1
OFDM??????PAPR????
  • ?????????????? ??

2
????????????????
  • ????????(???????)????20Mbit/s,?????????2Mbit/s
  • ???????????510?,????????????????
  • ?????????????????????
  • ??????????????,???????
  • ??????????????

3
OFDM?????
  • Orthogonal Frequency Division Multiplexing
  • ??????????
  • ????????????????????????

4
ODFM???????
  • ???????????????????,????????????????,?????????????
    ???,??????????????
  • OFDM??????????????????,???????????

5
OFDM?????(1)
OFDM?????
6
OFDM?????(2)
7
OFDM??????????
8
OFDM???????
  • OFDM????????????????
  • ???????????(ISI),????????????
  • ??????IFFT/FFT?OFDM????
  • ????????

9
OFDM???????
  • ???????????OFDM???????????????,???????????????(ICI
    )
  • ????????????(Peak-to-Average Power Ratio,PAPR)?

10
??OFDM???????
  • ?????????????????

11
??OFDM????????
  • ????
  • ????

12
??????
  • ???????????????
  • ?????????PAPR?OFDM??, ???????????PAPR????????????
    ???????????SNR????
  • ????????????????N???????OFDM?,????PAPR???????OFDM
    ???N????????????PAPR ?????,????????????????,??????
    ????

13
??????(?)
  • ?????????????(Selection Function,SF)???PAPR????OF
    DM???????
  • ???????????????????????M??????,??????????????,???
    ?????????,???????????PAPR???OFDM?????

14
??????
  • ??????OFDM???????????????????, ????????????????
  • ?????????????????????????????PAPR???????????

15
??????(?)
  • ????????OFDM???????????,?????????????????
  • ???????????????Fourier????Gaussian??Hamming??????
    ??????PAPR?
  • ????????OFDM ??????????,?????????????????????????
    ?,?????????????????????

16
??????(?)
  • ???????PAPR?????????????????, ?????OFDM???????,??
    ????PAPR????
  • ??????????????????????????????????????????,??????
    ??????????????????OFDM??????????????????????????

17
??
  • OFDM????????????????????????????????????PAPR??????
    ????,??????????????????,???????OFDM
    PAPR?????????????OFDM???????????????????
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