參數(shù)資料
型號(hào): STV0196
廠商: 意法半導(dǎo)體
英文描述: QPSK/BPSK DEMODULATOR AND FEC IC
中文描述: 調(diào)制/ BPSK調(diào)制解調(diào)器和FEC集成電路
文件頁數(shù): 21/23頁
文件大小: 236K
代理商: STV0196
NormalProcess
C/N
Estimation
Check
VSTATUS
SN < ----- 00
Collect C/N data 100 times
and calculateaverage value
S < 60
SN = 11
S < 40
m < ----- m - 4
Collect C/N data 100 times
and calculate average value
S < 20
m < ----- m - 4
Collect C/N data 100 times
and calculateaverage value
Compare with look-up table T3
Compare with look-uptable T2
Compare with look-up table T1
Output C/N estimation
SN < ----- SN + 1
Scaling S
Correction versus
Puncture Rate
A
Go to TuningRoutine
End of
Estimation
RestoreAGC Reference
Level to normal value
Return to normal process
A
N
Y
N
Y
N
Y
Y
N
Y
N
OK
T1 : Look-uptable for normal valueof m (AGC reference level)
T2 : Look-uptable for m - 4
T3 : Look-uptable for m - 8
0
B - FLOW CHART
Following is a simplified flow chart.
ANNEXE 1 :
C/n ESTIMATION(continued)
STV0196B
21/23
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