STA400A

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 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 SELECT...