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BCM4201
(R)
UNIVERSAL SATELLITE RECEIVER
FEATURES * Universal QPSK receiver for DIRECTV(R), DVB, and (R) * SUMMARY OF BENEFITS * A universal digital transmission solution for DVB, DSS, and
DigiCipher II systems * An integrated solution enabling low complexity/low-cost digital satellite IRDs * Variable data rates support all satellite systems worldwide
*
*
* * IEEE 1149.1 (JTAG) test interface * 80-pin PQFP pin package * 3.3V operation
DigiCipher II digital satellite reception Integrated satellite receiver * 2-85-Mbps variable rate BPSK/OQPSK/QPSK receiver * Dual integrated 8-bit A/D converters * Dual square-root Nyquist matched filters (a=0.2-0.35) * All digital clock and carrier recovery * Integrated PLLs DVB/DIRECTV/DigiCipher II-compliant FEC decoder * 64-state Viterbi decoder supports rates of 5/11, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 6/7, and 7/8 * Programmable convolutional deinterleaver, I=12 or I=13 with internal RAM * Reed-Solomon decoder: (n,k) = (204,188) or (146,130): t=8 Seamless interface to BCM3440 CMOS satellite tuner or direct IF input I2C and SPI compatible microcontroller interface
* Integrated 8-bit A/D converters and PLL reduce system
manufacturing costs
* Receives up to 85 Mbps for high-speed applications * Operates down to 1 Mbd with excellent adjacent channel
rejection characteristics due to 8-bit A/Ds for low-speed applications, such as SCPC * Specialized circuitry provided for cycle slip minimization * On-chip BER tester to simplify system optimization
Satellite IRD Block Diagram
Memory
Conditional Access
BCM7020
HD Video Audio
BCM4201
DVB-S Satellite Receiver
L-band
BCM3440 SatelliteTuner
HDTV MPEG-2 Transport Demux, Audio/ Video Decoder and Display Engine
Host CPU
OVERVIEW
RA_I +/ -
Down Conversion Pre-processing
8
A/D Phase/ Frequency Recovery A/D
8
Variable Rate Demod/ Equalizer
Nyquist = .20 - .35 Viterbi Decoder k=7 Nyquist = .20 - .35 Synch & Deinterleaver I=12,13
S_DATA
RS Decoder t=8 & Descram
S_VALID S_CLK S_SYNC P_DATA[7:0]
Deinterleaver RAM
AGC_CTRL
Acquisition/Tracking Loops and Clock Generation JTAG Interface
LNB_CTRL JTAG[3:0]
M-Bus/SPI Interface
MICRO[3:0]
The BCM4201 Universal Satellite Receiver is an integrated digital transmission solution for satellite Integrated Receiver Decoders (IRDs). Integrated features in the BCM4201 include a 2-85 Mbps variable rate BPSK/QPSK/OQPSK receiver, dual 8-bit A/D converters, a phase/ frequency recovery block, variable rate digital filters, square-root Nyquist matched filters, acquisition and tracking loops, and a DVB/ DIRECTV/DigiCipher II compliant concatenated Viterbi/ReedSolomon FEC decoder with deinterleaver. The receiver accepts an analog baseband or IF modulated (up to 480 MHz) signal, and transmits a demodulated error corrected output data stream. The BCM4201 supports the DVB digital transmission standard for satellite broadcasting that is in worldwide use today, DIRECTV digital transmission standard, and DigiCipher II ITU-R 217/11 digital transmission standard. Analog waveforms received by the BCM4201 are sampled by the integrated A/D converters, digitally mixed to baseband, resampled, and filtered by dual square-root Nyquist filters. Optimized soft decisions are delivered to a programmable rate 64-state Viterbi decoder, frame
synchronization block, deinterleaver, t=8 Reed-Solomon FEC, and derandomizer. The final error-corrected output is delivered in MPEG-2 or DIRECTV transport stream format. The BCM4201 is a flexible, cost-effective solution that is compatible with DVB, DIRECTV, and DigiCipher II ITU-R 217/11 standards. This enables manufacturers to design the BCM4201 into a single-standard IRD or a multi-standard IRD. The receiver supports variable bit rates up to 85 Mbps, which allows it to adapt to various satellite transponders in Europe, North America, and Asia. The BCM4201 is capable of supporting low rate applications (down to 1 MBd) for applications such as SCPC. The BCM4201 is optimized for high-volume manufacturing. This level of integration in the BCM4201 significantly reduces the cost and complexity of manufacturing IRDs. The BCM4201 contains an extremely accurate on-chip BER tester to simplify laboratory set-up and system optimization. Specialized circuitry has been implemented to virtually eliminate cycle slips.
Broadcom(R), the pulse logo, and Connecting everything(R) are trademarks of Broadcom Corporation and/ or its subsidiaries in the United States and certain other countries. All other trademarks mentioned are the property of their respective owners.
(R)
BROADCOM CORPORATION 16215 Alton Parkway, P.O. Box 57013 Irvine, California 92619-7013
(c) 2004 by BROADCOM CORPORATION. All rights reserved. 4201-PB04-R 06/30/04
Phone: 949-450-8700 Fax: 949-450-8710 E-mail: info@broadcom.com Web: www.broadcom.com

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