器件名称:
STA002
功能描述:
STARMANO CHANNEL DECODER
文件大小:
362.57KB 共43页
简 介:
STA002 STARMAN CHANNEL DECODER FRONT_END INTERFACE: IF input carrier frequency: f = 1.84 MHz Single internal 6 bit A/D converter QPSK demodulation Input symbol frequency: Fs = 1.84 Msymbols/s Digital Nyquist root filter: - roll-off value of 0.4 Digital carrier loop: - on-chip quadrature demodulator and tracking loop - lock detector - C/N indicator Digital timing recovery: - internal timing error evaluation, filter and correction Digital AGC: - internal signal power estimation and filter - output control signal for AGC (1 bit PWM) FORWARD ERROR CORRECTION: Inner decoder: - Viterbi soft decoder for convolutional codes, constraint length M=7, Rate 1/2 Deinterleaver block Outer decoder: - Reed-Solomon decoder for 32 parity bytes; correction of up to 16 byte errors - Block lengths: 255 - Energy dispersal descrambler BACK_END INTERFACE: Broadcast Channel selection Audio Service Component selection to MPEG decoder Service Component selection CONTROL: I2C serial Bus control interface TQFP44 DECRYPTION: WES scheme supported DESCRIPTION Designed for World Space satellites digital audio receivers, the STA002 Digital Receiver Front-end integrates all the blocks needed to demodulate incoming 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 ……
