LTE

, , . . -2014

, ., G1991 1999 20022006 2009 4G3.5G3G2.5G2G

LTE

LTE (1)

LTE (2)1. 12 180 . 2. 6 NRB 100. 3. ( LTE ). 10 . 4. OFDM- . OFDM- ( ) , OFDM-, . 5. . , , .

LTE (3)

LTE (4)1. - ( ). OFDM- 2. 12 (. . 180 ) OFDM-, , , 0,5 . 3. , . 4. .

LTE (5) 4-, 16- 64- - (QPSK, 16-QAM 64-QAM). , 2, 4 6 . 14000 /, , FDD-, 28 84 / .

2. 20 100 1200 , 33,6 100,8 /. 3. ( ) .

LTE (6)1. LTE SC-FDMA (Single-Carrier Frequency-Division Multiple Access). 2. , OFDMA , SC-FDMA , . 3. OFDMA .4.SC-FDMA . 5. OFDM, ( ).

LTE (7)LTE : 1.4, 3, 5, 10, 15, 20. , , , , eNodeB UE, . . GSM LTE - , , . , LTE, . 3. LTE , .

GSM, WCDMA LTE 1. GSM WCDMA , .. (). 2. ( ).3. WCDMA GSM , , , .

GSM LTE 1. GSM ( - ) LTE ( ) - , , . 2. , LTE, . 3. LTE , .

LTE 1. LTE .2. , , , () 3. () , , , .

GSM, WCDMA LTE 1. GSM WCDMA () ( ).2. . , : , ; ; , .

3. LTE , , ,

: , () () , ,

, , . () - , . , (, ).

(1)

, , , , . , () . , , . (2)

. , , .. . ( ). , , ( ), .. , . - () , ..

GSM, WCDMA LTE

LTE

LTE LTE : 1. . 2. .3. .4. , ( ) . 5. , .

LTE , , . , , .. eNB , -, , eNB.

LTE :1. 2. 3. 4. .

- ( )

LTE. LTE , . MCS (- ) LTE, / , . / , .. MCS .

LTE LTE . . . " " "" , , , .

LTE , . LTE . 3GPP (X2 ). , . . , LTE , , .

, LTE GSM (. Cell cluster). GSM () , - . , . / (/).

, , . / P() . P(C) 0,1...0,15. , P()

LTE .

LTE . , . , , . , , .

LTE .

. , , ( ). , , . . , , . , .. . . .

LTE

)

2)

, . , . - . , D , () d4 , d (), , , (M=1)1=2=(q1)-4, 3=4=q-4, 5=6=(q+1)-4, = 3, 1=(q+ 0,7)-4, 2=q-4, = 61=(q+1)-4

()

xi (); i xi; i- ln xi, .

, , :

,

/

/ (/)thr

, ,

:

LTE

. . .

: 1 ( ) . 2, 3 4 ( ) . 3. . c P() 4 ( ), 7 () 10 () , QPSK 1/3 1. ( A): R/r=1,5 =4,7,10 P()= 3,4%, 15,9%, 35,4% R/r=2,0 =4,7,10 P()= 0,3%, 5,2%, 13,5% R/r=2,5 =4,7,10 P()= 0,03%, 1,3% 7,9% 2. ( ): R/r=1,5 =4,7,10 P()= 0,3%, 4,7%, 12,8% R/r=2,0 =4,7,10 P()= 0,02%, 0,9%, 6,9% R/r=2,5 =4,7,10 P()= 0,01%, 0,7%, 3,7%

(7,21) 7 , : 4 , 3 ( ). . . , , . c P() 4 ( ), 7 () 10 () , QPSK 1/3 1. ( A): R/r=1,5 =4,7,10 P()= 3,1%, 13,4%, 29,2% R/r=2,0 =4,7,10 P()= 0,2%, 4,1%, 12,2% R/r=2,5 =4,7,10 P()= 0,01%, 0,7%, 6,4% 2. ( ): R/r=1,5 =4,7,10 P()= 0,1%, 4,3%, 10,9% R/r=2,0 =4,7,10 P()= 0,01%, 0,6%, 5,5% R/r=2,5 =4,7,10 P()= 0.01%, 0,3%, 2,5%

, LTE, , . , , , , , , .

- , () (). , (). , , .

, - , , /, , ( .), .. LTE , 148 10 , 144 15 140 20 . , DL , , UL . ( - ) , .

LTE , , :- 10 (125,8 - 148 ) , , 4. - 15 (121,8 144,2) , , 8. - 20 (117,8 139,9) , , 16.

,

28 (700 )

2,6

1

9.54.52.7

7.43.52.1

6.331.8

5.22.51.5

4.72.21.3

4.321.2

QPSK 1/3

16-QAM 3/4

64-QAM 5/6

N,

R,

1

QPSK 1/316-QAM 3/464-QAM 5/6

69.54.52.7

157.43.52.1

256.331.8

505.22.51.5

754.72.21.3

1004.321.2

1

QPSK 1/3

16-QAM 3/4

64-QAM 5/6

N,

R,

2

QPSK 1/3

16-QAM 3/4

64-QAM 5/6

N,

R,

3

c/ 6 100

1

173.3QPSK 1/3 (6 )QPSK 1/3 (6 )

161.1QPSK 1/3 (100 )QPSK 1/3 (100 )

16-QAM 3/4 (6 )16216-QAM 3/4 (6 )

16-QAM 3/4 (100 )149.816-QAM 3/4 (100 )

64-QAM 5/6 (6 )64-QAM 5/6 (6 )154.2

64-QAM 5/6 (100 )64-QAM 5/6 (100 )142

SNR = 0,3

SNR = 11,6

SNR = 19,4

MSC

L, dB

SNR = 0,3

SNR = 11,6

SNR = 19,4

1

QPSK 1/3 (6 )16-QAM 3/4 (6 )64-QAM 5/6 (6 )QPSK 1/3 (100 )16-QAM 3/4 (100 )64-QAM 5/6 (100 )

0.3160148

11.6149137

19.4141129

SNR = 0,3SNR = 11,6SNR = 19,4

QPSK 1/3 (6 )173.3

QPSK 1/3 (100 )161.1

16-QAM 3/4 (6 )162

16-QAM 3/4 (100 )149.8

64-QAM 5/6 (6 )154.2

64-QAM 5/6 (100 )142

1

SNR = 0,3

SNR = 11,6

SNR = 19,4

MSC

L, dB

SNR = 0,3

SNR = 11,6

SNR = 19,4

2

3

28 (700 ), 6 100

7 (2600 ), 6 100

, LTE 2300 2400 10, 15 20 , :- QPSK 1/3 - 3.3, 2.8 2.4 . - 16QAM 1/2 - 1.8, 1.6 1.45 - 64QAM 3/4 - 1, 0.8 0.7 - , .

( )

( )

1. , , , . , . 2. R/r , 3. , R 4. 5. , , =16 (R = 2r)

= 16 = 18,78

LTE , . (//) LTE FDD 3GPP. , . ( ) , 15*72 = 1,08 = 6 , - 16-QAM 1/3 (CQI=7). . PCFICH, PHICH PDCCH 2 OFDM- . CP (7 OFDM- 0,5 )

LTE FDD. LTE.

, OFDM- (1008000 96000 144000 1152 28800)*4*1/3 = 738048*1,33 = 981603 / ..0,98 /. , UE 2 , MIMO 2x2 , 0,98*2=1,96 /. ( ) 1,96/1,08 = 1,81 //.

-

LTE 1800 ( ) LTE 1800

LTE 1800 ( )

, LTE 20 (180*100 = 18) , , MIMO 2x2 , 1,81 /c/ .

( )

( VoIP) . 10 . , VoIP 1 ( 39.7 / ). , 10 . 55 . 0.025 1% 42.4 , -1696

: 1. 2. 3. 4. 5.

, .

(, , 3GPP TS 32.511). LTE, . : , , , . , , (SIB). E-UTRAN . , , SIB . LTE 2G/3G, UMTS/HSPA, GSM/GPRS 1x/1xEV-DO ( CDMA2000) . LTE , , .

LTE 504 () PCI (. Physical Cell Identity - ). PCI . (P-SCH) 62- - 0, 1 2. . , . , P-SCH WCDMA.

.

62- - ( ). 0167. , , . 168 , .

() . . , . , . , , MIMO. .

() , , . (PCI).

() : . . PUSCH PUCCH . , (.. ) , . - , .

. , . , . , , . PRACH (. Physical Random Access Channel - ), . .

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