. (). , , . , , .
, - (, , DBPSK ), S { s 0, s 1, , sn -1 }, , ( sps (samples persymbol)). E { e 0, e 1, , em -1}, ei =1. , . , E S . , S.
, ei S, sps ( 1).
1
S . r S E (1) . .
S S . , :
,(1)
k 0.. n - sps -1.
.
S { s 0, s 1, , sn -1 } ;
n ;
E { e 0, e 1, , em -1} , ei =1
m ;
sps S, , .
k .
1. S (k = 0).
2. m ( m - E) S. sps . , sps ∙ m S, . m ( AVG).
3.
4. k - S 2 4, S.
. , , AVG SUM, m c . SUM , , .
|
|
2
2 . SUMk -1 , SUMk SUMk = SUMk -1 Sk -1 + Sk + sps -1.
k - AVGk = SUMk / sps
3 - .