Casa Systems, Inc.

Douglas Keith Rosich

Weidong Chen

Tao Yu

David Bryan Fox

Jerry Guo

The techniques described herein relate to methods, apparatus, and computer readable media configured to decode modulated data. A modulated signal is received. A format of the modulated signal is determined, wherein the format can include a first format comprising a first type of modulated signal, or a second format comprising the first type of modulated signal and a second type of modulated signal that is different than the first type. The modulated signal is decoded by determining a frequency shift amount based on the format of the modulated signal, shifting a frequency band of the first type of modulated signal from an original position to a shifted position, thereby shifting a center frequency of the first type of modulated signal by the frequency shift amount, and filtering, based on the format of the modulated signal, signals outside of the frequency band of the shifted first type of modulated signal.

Dynamic sharing of OFDMA and ATDMA signals

A system and method for signal processing in a cable modem termination system (CMTS) is provided. A CMTS receiver in communication with a plurality of cable modems at a upstream signal or a cable modem receiver in communication with the CMTS at a downstream signal. A plurality of Advanced Time Division Multiple Access ('ATDMA') channel processors include a filter for recovering an ATDMA signal and a Orthogonal Frequency Division Multiplexing ('OFDM') channel processor includes a filter for processing a combined OFDM and ATDMA signal. A summation module subtracts the ATDMA signal from the combined ATDMA and OFDM signal to obtain a clean OFDM signal.

System and method for reducing interference in OFDM channels

Systems and methods are provided for improving the signal quality and performance in a cable operator's Hybrid Fiber Coax (HFC) plant by adding DOCSIS intelligence to components within the HFC plant. These intelligent DOCSIS devices, referred to here as DOCSIS Intelligent Nodes (DINs), intercept the upstream signal from cable modems and set top boxes, and perform various types of signal processing on the signals based upon knowledge of the signal characteristics obtained from CMTS control structures such as MAPs and Upstream Channel Descriptors (UCDs). The DIN functionality can be integrated into any type of device found in HFC networks such as RF amplifiers and fiber nodes.

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North Reading, MA, United States of America

Douglas Keith Rosich