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???????????????????