Design And Performance Of A Fully-Digital DOCSIS CMTS Receiver (2001)

By F. Buda, E. Lemois, A. Popper, J. Boutros, G. Karam, and H. Sari, Pacific Broadband Communications

This paper describes a DOCSIS-compliant cable modem termination system (CMTS) receiver architecture with very advanced features. All receiver functions are implemented digitally, and this feature, together with the advanced signal processing techniques used, leads to an ultra compact and highly scalable CMTS. The receiver architecture adopted makes it possible to implement in a single-chip several upstream burst demodulators along with the corresponding downstream modulators and medium access control (MAC)- layer functions. We report simulation and measurement results confirming the extremely high performance of the described CMTS receiver both in the QPSK and the16-QAM modes.

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