BCM3142 - 12-Channel Universal DOCSIS®/EuroDOCSIS™ 3.0 Burst Receiver

12-Channel Universal DOCSIS®/EuroDOCSIS™ 3.0 Burst Receiver

The BCM3142 QAMLink® Universal QPSK/QAM burst receiver is a highly integrated solution that significantly decreases the board space and cost of demodulators in digital cable modem headend applications. The BCM3142 provides 12 independent cable network receivers that accept QPSK and m-QAM burst data in TDMA or SCDMA schemes. Advanced features in the BCM3142 include an analog front end (AFE), a SCDMA despreader, a QAM demodulator, a generalized equalizer, and an enhanced Reed Solomon (RS) FEC decoder with dynamic deinterleaving.

The AFE performs analog-to-digital conversion (ADC) on RF input (either at 164 MHz or 204 MHz). The BCM3142 incorporates unique word detections of programmable length and pattern in the burst preamble for signal acquisition as fast as 16 symbols. An adaptive equalizer and ingress canceller characterizes the RF channel response, cancels ingress noise, and removes intersymbol interference (ISI) caused by microreflections in the channel. The FEC decoder consists of a programmable derandomizer, a programmable RS decoder with T values programmable up to 16, and a byte deinterleaver with burst-by-burst reconfiguration capability.

  • The BCM3142 is a universal headend advanced TDMA and SCDMA physical layer QPSK/QAM burst receiver
  • DOCSIS 3.0-based, IEEE 802.14&trade, DAVIC, and DVB compliant
  • Presents a high-performance, integrated solution for upstream demodulation in cable-over-data, video, and telephony applications
  • 12 independent burst receivers per package enable high-density equipment designs, reducing equipment board space requirements