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公开(公告)号：US20240204981A1
公开(公告)日：2024-06-20
申请号：US18394757
申请日：2023-12-22
Applicant: MAXLINEAR, INC.
Inventor： Thushara Hewavithana , Barak Hermesh
CPC classification number: H04L7/0033 , H04L12/2801 , H04L25/0212 , H04L27/2662 , H04L27/2695
Abstract: The present disclosure is directed to time stamp detection using a cable modem and to a control apparatus, control device and control method for detecting timestamps in various signals such as orthogonal frequency division multiplexing (OFDM) signals. The control apparatus comprising processing circuitry being configured to obtain information a channel frequency response of the multi-path channel, the channel frequency response being based on a signal comprising a sequence of symbols. The processing circuitry is configured to transform the channel frequency response into a channel impulse response. The processing circuitry is configured to identify a peak in the channel impulse response. The processing circuitry is configured to determine a timestamp offset time between the peak in the channel impulse response and a trigger time indicative of a beginning of a symbol in the signal. The processing circuitry is configured to synchronize the device clock based on the timestamp offset time.
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公开(公告)号：US20240356581A1
公开(公告)日：2024-10-24
申请号：US18762571
申请日：2024-07-02
Applicant: MaxLinear, Inc.
Inventor： Rainer Strobel , Thushara Hewavithana
Abstract: A node circuit associated with a hybrid fiber coax (HFC) network is disclosed. The node circuit includes an optimizer circuit configured to process a plurality of signal-to-noise ratio (SNR) values associated with a plurality of subcarriers, respectively, associated with a set of cable modem (CM) circuits coupled to the node circuit. In some embodiments, at least one subcarrier is allocated to the set of CM circuits for communication with the node circuit. In some embodiments, the optimizer circuit is further configured to determine an optimal transmit power of the node circuit, based on the plurality of SNR values and a transmitter distortion of a transmitter circuit associated with the node circuit. In some embodiments, the transmitter distortion defines a transmitter distortion associated with the transmitter circuit in terms of a total transmit power of the node circuit.
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Patent Agency Ranking
公开(公告)号：US11133915B2
公开(公告)日：2021-09-28
申请号：US16601611
申请日：2019-10-15
Applicant: MaxLinear, Inc.
Inventor： Boaz Kol , Noam Tal , Shaul Shulman , Thushara Hewavithana
IPC: H04L5/14 , H04B3/21 , H04L27/00 , H04L27/148
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.
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公开(公告)号：US20220149891A1
公开(公告)日：2022-05-12
申请号：US17434383
申请日：2020-02-26
Applicant: MAXLINEAR, INC.
Inventor： Rainer Strobel , Thushara Hewavithana
Abstract: A node circuit associated with a hybrid fiber coax (HFC) network is disclosed. The node circuit includes an optimizer circuit configured to process a plurality of signal-to-noise ratio (SNR) values associated with a plurality of subcarriers, respectively, associated with a set of cable modem (CM) circuits coupled to the node circuit. In some embodiments, the plurality of subcarriers comprises subcarriers that are allocated to the set of CM circuits for communication with the node circuit. In some embodiments, the optimizer circuit is further configured to determine an optimal transmit power of the node circuit, based on the plurality of SNR values and a distortion model of a transmitter circuit associated with the node circuit. In some embodiments, the distortion model defines a transmitter distortion associated with the transmitter circuit.
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公开(公告)号：US12028125B2
公开(公告)日：2024-07-02
申请号：US17434383
申请日：2020-02-26
Applicant: MAXLINEAR, INC.
Inventor： Rainer Strobel , Thushara Hewavithana
Abstract: A node circuit associated with a hybrid fiber coax (HFC) network is disclosed. The node circuit includes an optimizer circuit configured to process a plurality of signal-to-noise ratio (SNR) values associated with a plurality of subcarriers, respectively, associated with a set of cable modem (CM) circuits coupled to the node circuit. In some embodiments, at least one subcarrier is allocated to the set of CM circuits for communication with the node circuit. In some embodiments, the optimizer circuit is further configured to determine an optimal transmit power of the node circuit, based on the plurality of SNR values and a transmitter distortion of a transmitter circuit associated with the node circuit. In some embodiments, the transmitter distortion defines a transmitter distortion associated with the transmitter circuit in terms of a total transmit power of the node circuit.
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公开(公告)号：US11856081B2
公开(公告)日：2023-12-26
申请号：US17594822
申请日：2020-04-15
Applicant: MAXLINEAR, INC.
Inventor： Thushara Hewavithana , Barak Hermesh
CPC classification number: H04L7/0033 , H04L12/2801 , H04L25/0212 , H04L27/2662 , H04L27/2695
Abstract: The present disclosure is directed to timestamp detection using a cable modem and to a control apparatus, control device and control method for detecting time stamps in various signals such as orthogonal frequency division multiplexing (OFDM) signals. The control apparatus comprising processing circuitry being configured to obtain information a channel frequency response of the multi-path channel, the channel frequency response being based on a signal comprising a sequence of symbols. The processing circuitry is configured to transform the channel frequency response into a channel impulse response. The processing circuitry is configured to identify a peak in the channel impulse response. The processing circuitry is configured to determine a timestamp offset time between the peak in the channel impulse response and a trigger time indicative of a beginning of a symbol in the signal. The processing circuitry is configured to synchronize the device clock based on the timestamp offset time.
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公开(公告)号：US20220209931A1
公开(公告)日：2022-06-30
申请号：US17594822
申请日：2020-04-15
Applicant: MAXLINEAR, INC.
Inventor： Thushara Hewavithana , Barak Hermesh
Abstract: The present disclosure is directed to timestamp detection using a cable modem and to a control apparatus, control device and control method for detecting time stamps in various signals such as orthogonal frequency division multiplexing (OFDM) signals. The control apparatus comprising processing circuitry being configured to obtain information a channel frequency response of the multi-path channel, the channel frequency response being based on a signal comprising a sequence of symbols. The processing circuitry is configured to transform the channel frequency response into a channel impulse response. The processing circuitry is configured to identify a peak in the channel impulse response. The processing circuitry is configured to determine a timestamp offset time between the peak in the channel impulse response and a trigger time indicative of a beginning of a symbol in the signal. The processing circuitry is configured to synchronize the device clock based on the timestamp offset time.
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