802.11b/b+ (Packet Binary Convolutional Coding, PBCC).
. , . . , , , r = 1/2. , 2/3.
, . . , , , , , . (K = 7).
, , , , , .
PBCC (K = 7) r=1/2. . , . .
, , , . , .
802.11b 5,5 11 /. , 802.11b+ 802.11b. , 802.11b+ , . 802.11b+ 22 / PBCC.
5,5 / , , , 11 / . 11 / , 5,5 / ( ). 5,5 /, 11 / 11×106 .
|
|
22 / PBCC . , 8- (8-PSK), , 3 . , (Puncture). : , 2 ( ), , , , , .
, , , , .
, . . 4/3.
1/2, 2/3, .
, PBCC 22 / 802.11b+.
(K = 7, R = 1/2) 22 /. 44 / 4:3, , . , 33 / ( , ). 8-PSK, . 11×106 , 22 / (. 2).
. 7.2. 22 / 802.11g. |
802.11b/b+ (. 1).
1. 802.11b/b+ | ||||||
, / | , 106 / | |||||
() | DBPSK | - | ||||
() | DQPSK | - | ||||
5,5 | () | K | DQPSK | - | 1,375 | |
() | PBCC | DBPSK | 1/2 | 0,5 | ||
() | K | DQPSK | - | 1,375 | ||
() | PBCC | DQPSK | 1/2 | |||
22* | () | PBCC | DQPSK | 3/4 | ||
* . 22 / 802.11b+. |
|
|