參數(shù)資料
型號: STA400A
廠商: 意法半導(dǎo)體
英文描述: XMRADIO SDARS CHANNEL DECODER
中文描述: XMRADIO衛(wèi)星數(shù)字收音機(jī)信道解碼器
文件頁數(shù): 52/117頁
文件大?。?/td> 910K
代理商: STA400A
STA400A
52/117
attenuation function:
;
α
(k + 1) =
α
(k) +b
k
0
=
channel window length (in Symbol Rate), a = attenuation factor (in dB) and b= corr_weight_factor / 2
13
Constant Channel Window (Ko=180 samples):
Constant Attenuation (3dB):
HistLen_M
-
History Register Length
Stores the last 15 shift operations of the window start position. The chosen value will restrict the array out of
which the minimum shift operation will be searched.
b3-b0
: 0000=Current correlation maximum will be proceeded
.
1111=Current and the last 15 correlation positions will be taken account
CN_M
-
Estimated Noise ans Signal to Noise Power
Uses 12 adjacent carriers besides the active carriers. Estimates power within these 24 adjacent carriers
(mff_n_guard) and power within all 637 active carriers (mff_cpn_act).
b23-b12
:
b11-b0
:
mff_n_guard
mff_cpn_act
Attenuation
b (*2
13
)
0dB
8192
3dB
8184
6dB
8176
12dB
8160
Channel Window
b(*2
13
)
180
8184
90
8176
45
8160
Type:
SingleByte - R/W
Word Length:
4
Byte Name
Address (Hex)
Bit Map
Reset Value (Hex)
HistLen_M
0117
3-0
0F
Type:
MultiBytes - R
Word Length:
24
Byte Name
Address (Hex)
Bit Map
Reset Value (Hex)
CN3_M
011B
23-16
--
CN2_M
011A
15-8
--
CN1_M
0119
7-0
--
α
k
( )
10
0
---------
--------------
=
b
10
0
---------
--------------
=
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