參數(shù)資料
型號(hào): L64777
英文描述: L64777 DVB QAM Modulator technical manual 6/00
中文描述: L64777的DVB QAM調(diào)制器技術(shù)手冊(cè)6 / 00
文件頁數(shù): 16/124頁
文件大?。?/td> 988K
代理商: L64777
2-2
Modulator Architecture
2.1 Introduction
The L64777 implements the modulator processing chain defined in
ETS 300 429. This processing chain is illustrated in Figure 2.1.
Figure 2.1
ETS 300 429-Compliant Modulation Operation
Figure 2.2 is a block diagram of the L64777 architecture. The input clock
drives only the input synchronizing stage. The OCLK, which is four times
the QAM symbol rate, is the base of all residual processing.
A numerically controlled oscillator (NCO) module allows the L64777 to
interface with LSI Logic L64724. In this case, the chip must receive the
L64724 PCLK clock; thus, the byte_clock output from L64724 must be
applied to ICLK. This assumes the PCLK has generated the byte clock.
Energy
Dispersal
RS
(204,188)
Encoder
Convol.
Interleaver
QAM
Mapping
Byte to
m-tuple
conversion
Differential
Encoder
I
Q
Square
Root
Nyquist
Filter
相關(guān)PDF資料
PDF描述
L64777 Digital Video Broadcasting(DVB)-Compliant,quadrature amplitude modulation (QAM)Modulator(數(shù)字視頻廣播系統(tǒng)適配的積分調(diào)幅調(diào)制器)
L64825 Non-VGA Video Controller
L64845 64-Bit Graphics (GUI) Accelerator
L64850GC-25 DRAM Controller
L64850GC-33 DRAM Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L64780 制造商:未知廠家 制造商全稱:未知廠家 功能描述:L64780 DVB-T COFDM Demodulator technical manual 2/00
L64781 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single-Chip COFDM Receiver
L64782 制造商:未知廠家 制造商全稱:未知廠家 功能描述:L64782 Single-Chip COFDM Receiver
L6480 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:The L6480, realized in analog mixed signal technology, is an advanced fully integrated solution suitable for driving two-phase bipolar stepper motors with microstepping.
L64801GC-20 制造商:未知廠家 制造商全稱:未知廠家 功能描述:32-Bit Microprocessor