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VES1993

NXP
Part Number VES1993
Manufacturer NXP
Description SINGLE CHIP SATELLITE CHANNEL RECEIVER
Published Apr 16, 2005
Detailed Description VES 1993 SINGLE CHIP SATELLITE CHANNEL RECEIVER FEATURES • DSS and DVB-S compatible single chip demodulator & forward er...
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VES1993
VES1993

Overview
VES 1993 SINGLE CHIP SATELLITE CHANNEL RECEIVER FEATURES • DSS and DVB-S compatible single chip demodulator & forward error correction.
• Dual 6-bit ADC on chip.
• PLL for crystal frequency multiplication.
• Variable rate BPSK/QPSK coherent demodulator.
• Modulation rate from 1 to 45MBaud.
• Automatic Gain Control output.
• Digital symbol timing recovery : Acquisition range up to ±240ppm • Digital carrier recovery : Acquisition range up to ±12% of symbol rate • Half Nyquist baseband filters on chip roll-off = 0.
35 for DVB and 0.
2 for DSS • Channel quality estimation.
• Viterbi decoder : Supported rates : from 1/2 to 8/9.
Constraint length K = 7 with G1 = 1718 G2 = 1338 VBER measurement provided.
• Convolutional deinterleaver and Reed Solomon decoder according to DVB and DSS specifications.
• Automatic Frame Synchronization.
• Selectable DVB-S descrambling.
• I2C bus interface.
• 100-pin MQFP package.
• CMOS technology (0.
35 µm 3.
3V).
APPLICATIONS • DSS receivers.
• DVB-S receivers (ETS 300-421).
• Direct Broadcast Satellite (DBS).
DESCRIPTION The VES 1993 is a single-chip channel receiver for satellite television reception which matches both DSS and DVB-S standards.
The device contains a dual 6-bit flash analog to digital converter, variable rate BPSK/QPSK coherent demodulator and Forward Error Correction functions.
The ADCs directly interface with I and Q analog baseband signals.
After A to D conversion, the VES 1993 implements a bank of cascadable filters as well as antialias and half-Nyquist filters.
Analog AGC signal is generated by an amplitude estimation function.
The VES 1993 performs clock recovery at twice the Baud rate and achieves coherent demodulation without any feedback to the local oscillator.
Forward Error Correction is built around two error correcting codes : a Reed-Solomon (outer code), and a Viterbi decoder (inner code).
The Reed-Solomon decoder corrects up to 8 erroneous bytes among the N bytes of one data packet.
Convolutional deinterleaver is...


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