BCM3137 Features
• The Broadcom BCM3137 is a headend QPSK/QAM burst receiver for CMTS applications
• DOCSIS/EuroDOCSIS, IEEE 802.14, DAVIC and DVBcompliant
• Programmable Demodulation: QPSK/16 QAM
• Variable symbol rates from 100 kBaud up to 5.12 MBaud
• Analog front-end featuring dual gain stages and dual 10-bit ADCs, plus a 6-bit ADC to estimate wideband channel
• Fast burst acquisition: preamble size as small as 4 bytes
• Programmable components include:
• Flexible symbol demapping: Differential / Non-Differential
• RS decoder block size (N), GF (256), T = 1 to 10
• Last RS codeword size: fixed or shortened
• 23-bit derandomizer: polynomial, seed, type
• Derandomizer location: before/after RS decoder
• Internal burst FIFOs for receive rate de-coupling
• Choice of serial data receive interfaces
• JTAG Test Interface
• 100-pin PQFP Package
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