
Inside a Cable Modem
• Demodulator
– Performs analog-to-digital (A/D) conversion,
demodulation (QAM-64/256), Reed Solomon error
correction and MPEG frame synchronization
• In the receive direction, the interface signal feeds a
demodulator
– Companies
• Broadcom, Conexant Systems, SGS Thomson, VLSI
Technologies/Philips, LSI Logic, Fujitsu
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