OFDM

..

53427/2

12015

. ,

OFDM

2

OFDM. , OFDM : (rectangular REC); (raised cosine RC); (better than raised cosine BTRC); sinc (sinc power SP); sinc (improved sinc power ISP).

3

(1)

4

(2)

5

F(t) OFDM-;j ;N ;fc ;k (0N-1);fk k- ;Dk ( );p(t) , OFDM .

:

Ts OFDM-.

h(t) ;w(t) .

,

6

OFDM- ( ) ( ), . . , .

, :

(01);, n ;

7

ISP

8

ISP

ISP n=2( sinc) .

0.5 10 . , ISP .

REC, RC, BTRC

9

REC, RC BTRC

(0, 0.3 1).

=0 RC BTRC , REC.

=0.3 RC BTRC , =1.

, RC BTRC [0;1].

OFDM (N=1024)

10

OFDM

11

12

OFDM- .

REC OFDM , , ( ISP), ( ISP). .