. GSM, , , MIMO . , , OFDM GFDM .
OFDM
GFDM
PAPR Peek-to-Average Power Ratio
Pulse shaping filter —
Raised cosine filter — :
Root-raised cosine filter — :
OFDM
OFDM 4G.
: , . OFDM . : N (). , .. №1 №2. . .
. . , . , №1 №2 . , , . .
OFDM . . , .
, , , №2 №1 №3 . . OFDM . , .
, «». «» — .
. OFDM . . , 1 0.5 , 0.5 . ? - - .
. . , . , -. - .
. , , . - , . , , . . . PAPR . . OFDM . . , QPSK . . , . , , 100. , .
GFDM
GFDM . , GFDM . GFDM , . - ( OFDM) . , , .
GFDM. «pulse shaping» . . , .
: «sinc», «raised cosine» «root-raised cosine» . Sinc sinx/x . sinc , , . .
«root-raised cosine» . «pulse shaping», . «root-raised cosine» . ( ), «pulse shaping» «root-raised cosine» .
«root-raised cosine» «pulse shaping», «root-raised cosine» . -60 «root-raised cosine» .
. , «root-raised cosine» . . , . , Double side interference cancellation, OFDM.
, . , GFDM -60, - . , - . .
. , GFDM , . PAPR, .
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