參數(shù)資料
型號: L64780
廠商: LSI Corporation
英文描述: DVB-T COFDM Demodulator(對地數(shù)字視頻廣播 正交編碼頻率分割多路處理解調(diào)器)
中文描述: 的DVB - T COFDM解調(diào)器(對地數(shù)字視頻廣播正交編碼頻率分割多路處理解調(diào)器)
文件頁數(shù): 15/126頁
文件大小: 953K
代理商: L64780
RF Tuner Block Functions
1-5
Figure 1.3
illustrates how terrestrial and satellite reception can be
combined in one unit. For satellite reception, the IF signal (for example,
from 1 to 2 GHz) from the dish unit is fed into a satellite tuner. This tuner:
1.
Selects one RF signal from the 1 to 2 GHz range
2.
Converts the signal to one or more intermediate frequencies
3.
Down-converts the signal to base band
4.
Feeds its I and Q components into the L64724 single-chip DVB-S
satellite receiver
The L64724:
1.
Samples the I and Q baseband signals
2.
Demodulates the QPSK
3.
Processes the error correction functions
The L64724 also implements a bypass of the ADC and demodulation
functions. Thus, it can accept the soft decisions delivered by L64780 and
feed them directly to the Viterbi decoder. This architecture implements a
cost-effective solution for mixed satellite and terrestrial front-ends.
Figure 1.3
Receiver Architecture for Satellite and Terrestrial Reception
Satellite Tuner
MPEG Transport Stream
L64724
Terrestrial Tuner
L64780
UHF/VHF
L-band
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