Abstract: A cable modem comprises transmitter circuitry, receiver circuitry, and memory. Upon power up of the cable modem in the field, the transmitter circuitry transmits one or more first signals into a network. The receiver circuitry measure echoes of the transmitted one or more first signals. The receiver circuitry generates an installation figure of merit based on the measured echoes and factory-calibration echo measurements stored in the memory. The communication device begins DOCSIS® network registration if the installation quality measurement meets a determined requirement and generates a notification to troubleshoot the installation of the communication device if the installation quality measurement does not meet a determined requirement.

Abstract: A system comprises local oscillator spur suppression circuitry, local oscillator generator circuitry), and beamforming circuitry. The local oscillator spur suppression circuitry is operable to generate a phase adjustment value. The local oscillator generator circuitry is operable to generate a local oscillator signal at a determined phase equal to a reference phase offset by the phase adjustment value. The beamforming circuitry is operable to receive the phase adjustment value, and generate a beamforming coefficient to be applied to a signal that is to be upconverted by the local oscillator signal and transmitted via an antenna element of a phased array, wherein the generation of the beamforming coefficient is based on the phase adjustment value and a location of the antenna element within the phased array.

Abstract: A multi-carrier transmitter apparatus is disclosed. The apparatus includes an outer encoder, a shell mapper and an inner encoder. The outer encoder is configured to receive a signal, perform error correction using an outer code on the received signal and generate an outer encoder signal. The shell mapper is configured to perform constellation shaping on a subset of bits from the outer encoder signal and generate one or more constellation shaping bits. The inner encoder is configured to perform inner error correction/encoding using an inner code on a second subset of bits from the outer encoder signal and generate an inner correction signal.

Abstract: Systems, methods, and circuitries are disclosed generating a dynamic clock signal having a dynamic clock signal frequency for a data processing system from an input clock signal having an input clock signal frequency. In one example, adaptive frequency scaling circuitry includes scaling control circuitry and clock gating circuitry. The scaling control circuitry includes hardware configured to receive a performance indicator value indicative of an operating parameter of the data processing system and select a dynamic clock gating control value based at least on the performance indicator value. The clock gating circuitry is configured to receive the dynamic clock gating control value, and in response, selectively gate the input clock signal based on the dynamic clock gating control value to generate the dynamic clock signal.

Abstract: Systems and methods are provided for reducing outage scope in cable networks with ideal taps. An ideal tap may have a plurality of ports that include at least an input port configured for receiving downstream (DS) signals from and transmitting upstream (US) signals to upstream nodes, an output port configured for transmitting downstream (DS) signals to and receiving upstream (US) signals from downstream nodes, and one or more drop ports for receiving signal from and transmitting signals to customer premise equipment (CPE) in the coaxial network. The ideal tap may further include one or more mitigation components configured for reducing scope of outage in the ideal tap, with the one or more mitigation components configured to, when an outage occurs in the ideal tap, provide or maintain inter-port connectivity within the ideal tap, the inter-port connectivity including at least connectivity between the input port and the output port.

Abstract: Methods and systems are provided for using frequency spreading during communications, in particular communications in which multiple carriers (or subcarriers) are used. The frequency spreading may comprise generating a plurality of spreading data vectors based on transmit data, such as by application of a spreading matrix to portions of the transmit data. Each spreading data vector may comprise a plurality of elements, for assignment to the multiple subcarriers. The receive-side device may then apply frequency de-spreading, to obtain the original transmit data. The frequency de-spreading may comprise use of the same spreading matrix on data extracted from received signals, which (the data) may correspond to the plurality of spreading data vectors.

Abstract: An ideal tap may have a plurality of ports that include at least an input port configured for receiving downstream (DS) signals from and transmitting upstream (US) signals to nodes upstream from the tap within the coaxial network, and one or more other ports that comprise at least one of an output port configured for transmitting downstream (DS) signals to and receiving upstream (US) signals from nodes downstream from the tap within the coaxial network, and a drop port for receiving signal from and transmitting signals to customer premise equipment (CPE) in the coaxial network. The ideal tap may further include processing circuits for handling signals received and transmitted via the tap, with the one or more processing circuits being configured to meet particular predefined tap performance criteria, and to specifically apply, during handling of signals in the tap, frequency shifting based on one or more frequency spectrum shift conditions.

Abstract: A high-speed serial interface (HSIF) for communicating between an analog front end (AFE) and a System on a Chip (SoC) digital radio via a bi-directional serial bit connection for an OFDM cable modem includes generating Status Frames and Data Frames to be communicated between the tuner and AFE and sending the generated Status Frames and Data Frames on a continual basis. Each Frame is a 10-bit K.28 Comma Sync word followed by a payload and when no data is queued to be communicated, Status Frames are sent asynchronously as filler frames.

Abstract: Network devices (e.g., a modem, router, wireless user device, laptop, personal digital assistant or other similar wireless network devices) can be configured to monitor and detect a biological presence. In response to determining a biological presence (e.g., a human being or other similar being), a network device can alter parameters related to the generation of radio frequency (RF) energy in order to further ensure or guarantee safety from potential radiation as the number and power of network devices within a certain premises or vicinity increases.

Abstract: A system comprises a plurality of antenna elements arranged in a two-dimensional array, and a plurality of transmitter circuits communicatively coupled to the antenna elements, wherein the antenna elements and transmitter circuits are configured such that desired components of signals output by the plurality of transmitter circuits and radiated via the antenna elements coherently combine in a desired direction. Each of the transmitter circuits is operable to generate a corresponding second signal for transmission via a respective one of the antenna elements by shifting a phase of undesired components in the signal relative to a phase of desired components in the signal.

Abstract: A device comprises a memory configured to store, for each one of a plurality of communication lines, an associated relative weight and an associated noise value indicative of a signal-to-noise ratio of transmission on the respective communication line. The device further comprises at least one processor configured to perform an optimization of a transmission precoding parameter for vectored transmission on the plurality of communication lines based on the relative weights and the noise values. The at least one processor is configured to effect the vectored transmission on the plurality of communication lines in accordance with the optimized transmission precoding parameter.

Abstract: Systems, methods, and circuitries are provided to measure a swept error power ratio (SWEEPR) of a device under test. A method includes generating a time-variant stopband test signal having a time-variant stopband and determining an error of the device under test based on an output signal generated by the device under test in response to the time-variant stopband test signal.

Abstract: A receiver may include a first filter configured to generate a first estimation of a symbol of a received signal and a second filter configured to generate a second estimation of the symbol of the received signal. The receiver may also include a decoder configured to decode the symbol using one of the first estimation and the second estimation and a decision circuitconfigured to select one of the first estimation and the second estimation to provide to the decoder for decoding of the symbol based on a comparison of the first estimation to an estimation threshold.

Abstract: This disclosure relates to offloading processing intensive tasks in communication protocol specific operations off the device, e.g. to another network node connected to the device via a network. Such tasks may for example include flow control, segmentation/desegmentation, and/or error control. As part of error control, protocols of the transport protocol layer of the OSI protocol stack may include checksum calculation to ensure reliability of the (payload) data. The calculation of checksums may be processing intensive. For this reason, example client nodes that realize the offloading of processing intensive tasks in communication protocol specific operations to another network node may not utilize any transport layer protocol at all, but rely on flow control and error control implemented in most modern data link layer protocols (Layer 2 of the OSI protocol stack). Accordingly, the processing intensive tasks can be “shifted” from the client device to another device.

Abstract: Systems and methods are provided for use of common mode rejection (CMR) for echo cancellation in uplink communications. A node in a cable network configured for transmitting downstream (DS) signals and receiving upstream (US) signals, may include echo cancelling circuits configured for cancelling echo introduced by the DS signals and/or transmittal of the DS signals, onto US signals and/or US reception path, to facilitate full-duplex (FDX) communications of the DS signals and US signal. The echo cancelling circuits may be configured for operating in the analog domain. The echo cancelling circuits may include an echo cancelling combiner configured for combining two or more upstream signals non-coherently.

Abstract: A line driver circuit has first and second differential input terminals and first and second differential output terminals, and is configured to interface with first and second termination impedances coupled between the first and second differential output terminals, respectively, and first and second transmit chain output terminals, respectively. The line driver circuit includes an amplifier circuit having first and second input terminals coupled to the first and second differential input terminals of the line driver circuit, respectively, and first and second output terminals coupled to the first and second differential output terminals of the line driver circuit, respectively, and an impedance switching circuit coupled between the first and second output terminals of the amplifier circuit.

Abstract: An on-chip data packet processing method and corresponding integrated circuit, wherein data packets are received at an ingress port and processed with an on-chip wire-speed engine. The processing comprises adding metadata to the data packets, forwarding the processed data to an on-chip QoS unit, altering the metadata of the data packets and/or providing further metadata to the data packets. The data packets are forwarded from the on-chip QoS unit to an on-chip data consumer. If the data consumer is a processing unit the data packets are processed in a first processing step, redirected from the processing unit to the QoS unit and the step of forwarding the data packets to an on-chip data consumer is repeated.

Abstract: A cable modem transceiver includes a processor configured to derive an instant of time for an upstream calibration signal on basis of upstream scheduling information. Further, the cable modem transceiver includes a transmitter configured to generate the upstream calibration signal at the derived instant of time. The cable modem transceiver additionally includes a detector configured to determine a property of the generated upstream calibration signal. The processor is further configured to derive at least one calibration parameter for the transmitter on basis of the detected property.

Abstract: A cable modem supporting full duplex (FDX) operations. The cable modem includes a transmit circuitry configured to process a transmit signal and a receive circuitry configured to process a receive signal. The receive circuitry includes a switchable analog filter configured to filter the receive signal. The switchable analog filter is configurable for different passband frequencies. The receive circuitry also includes a digital compensation filter configured to compensate a difference in frequency response in a specific frequency band due to switching of the switchable analog filter for a different passband frequency. The cable modem also includes an adjacent channel interference (ACI) cancellation filter and an adjacent leakage interference (ALI) cancellation filter. A digital compensation filter is also used in processing the ACI cancellation signal and the ALI cancellation signal to impose or compensate the difference in frequency response due to the switchable analog filter switching.

Abstract: Systems and methods are provided for utilizing ultra-efficiency low noise configurations for phased array antennas. Radio frequency integrated circuits (RFICs) may be used in phased array antennas to enable configuring large number of phase shifters in highly efficient manner, and to do so in optimal manner, such as with low noise.