參數(shù)資料
型號(hào): VES1820X
廠商: NXP SEMICONDUCTORS
元件分類: 消費(fèi)家電
英文描述: Single chip DVB-C channel receiver(單片DVB-C頻道接收器)
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝: MQFP-100
文件頁(yè)數(shù): 35/40頁(yè)
文件大小: 182K
代理商: VES1820X
1999 March 01
35
Philips Semiconductors
Product specification
Single chip DVB-C channel receiver
VES1820X
FRAME SYNCRONIZATION (Con’t)
FORMULAS
The following formulas show frame synchronization parameter relationships.
TRF = 1
Pd
a
1631
ê
ê
Ps
1 - Ps
+ 1 - Pd
1 - Pd
a
é
ê
ù
ú
ú
ú
where, Pd = (1 - BER)8 is the probability of detecting a sync word
1
256
is the probability to miss-detect the sync word.
1631 Ps
a
Pd
and Ps
=
PF =
a
+ 1631 P
s
a
TMF = 1
qd
b
.
1 - qd
1 - qd
b
where qd = 1 - Pd is the probability of failing to detect a sync word.
FIGURE 16 : FRAME SYNCHRONIZATION STATE MACHINE DIAGRAM
ALIGNED
AL
S
MIS-ALIGNED
LOCKED MODE
SEARCH MODE
AS
S
MS
S
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