STA002
DESCRIPTION
Designed for World Space satellites digital audio receivers, the STA002 Digital Receiver Front-end integrates all the blocks needed to demodulate ining digital satellite audio signals from the tuner: analog to digital converter, QPSK demodulator, signal power estimator, automatic gain control, Viterbi decoder, deinterleaver, Reed-Solomon decoder and energy dispersal descrabler. Its advanced error correction functions guarantees a low error rate even with small low gain receiver antennas. Additional functions include the selection of broadcast channel, service ponents and audio ponents for source decoding:
- The MPEG Audio bitstream is provided at the serial audio output port.
- The Broadcast Channel is provided to the serial data output port.
- The Service ponent is provided at the SC output interface. World Space encryption scheme is supported for pay programs and paging.
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January 2002 1/43
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Fig. 1: Channel Decoder Block Diagram
BCCK BC DATA INTERFACE LOCK...
