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STA400A Datasheet

  • STA400A

  • XMRADIO SDARS CHANNEL DECODER

  • 117頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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STA400A
XMRADIO SDARS CHANNEL DECODER
FRONT END INTERFACE
s
TWO INTERNAL 10 BIT A/D CONVERTERS
s
TWO QPSK DEMODULATORS FOR
SATELLITE BRANCH
s
ONE MULTICARRIER DEMODULATOR FOR
TERRESTRIAL BRANCH
s
SATELLITE SYMBOL FREQUENCY: 1.64
MBAUD
s
TERRESTRIAL SYMBOL FREQUENCY: 2.99
MBAUD
s
DIGITAL ROOT RAISED COSINE NYQUIST
FILTER: 15% ROLL-OFF
s
FFT LENGTH: 768 SUB-CARRIERS
s
FULL DIGITAL CARRIER AND FREQUENCY
RECOVERY AND TRACKING LOOPS
s
FREQUENCY INVERSION COMPENSATION
FOR HIGH-SIDE/LOW-SIDE MIXER
INJECTION
s
LOCK DETECTORS, C/N INDICATOR, ON
CHIP BER ESTIMATORS
s
TWO DIGITAL AGCs: INTERNAL SIGNAL
POWER ESTIMATION AND FILTERING
s
1 BIT PDM AGCs CONTROL SIGNAL
OUTPUTS
TDM DECODING AND MANAGEMENT
s
SATELLITE AND TERRESTRIAL FRAME
SYNCHRONIZATION
s
SATELLITE PHASE AMBIGUITY RESOLUTION
s
TDM DEMULTIPLEXING
s
PRIME RATE CHANNEL (PRC)
DEMULTIPLEXING
s
EXTERNAL MEMORY CONTROLLING
FORWARD ERROR CORRECTION
s
VITERBI DECODER: K=7, R=1/3
s
SATELLITE DEPUNCTURING: RATE 3/4
s
TERRESTRIAL DEPUNCTURING: RATE 3/5
s
CONVOLUTIONAL TIME DEINTERLEAVER
OVER 4.7 SEC
s
BLOCK DEINTERLEAVER OVER 2 RS
BLOCKS
s
REED-SOLOMON DECODER: (255,223). UP
TO 16 BYTES CORRECTION CAPABILITY.
September 2003
廬
TQFP144
ORDERING NUMBER: STA400A
T H I S D E V I C E C A N B E S O L D O N LY TO
CUSTOMERS THAT HAVE SIGNED A LICENSE
AGREEMENT WITH XM SATELLITE RADIO.
s
s
ENERGY DISPERSAL DESCRAMBLER
SAT-SAT AND TERR-SAT DIVERSITY
COMBINING
BACK END INTERFACE
s
TWO PAYLOAD CHANNEL BITSTREAM
INTERFACES
s
PAYLOAD CHANNEL SELECTION LOGIC
s
DESIGNED TO WORK WITH THE STA450A
SERVICE AND SOURCE DECODER
LOW POWER TECHNOLOGY
s
1.8V, 0.18碌m TECHNOLOGY
s
3.3V CAPABLE I/Os
CONTROL
s
IIC-BUS SLAVE CONTROL INTERFACE
s
DEVICE ADDRESS: 1101010
DESCRIPTION
The SDARS is a satellite transmission system based
on two geostationary satellites on the East and West
coasts of the Continental United States (CONUS). In
the urban areas, where the line of sight reception of
the satellites is difficult or not possible, the service is
covered by terrestrial repeaters adopting a MultiCar-
rier Modulation scheme.
Designed for digital radio receivers compatible with
the XMRadio SDARS System, the STA400A Chan-
nel Decoder integrates all the functions to demodu-
1/117

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