公开(公告)号：US20250167887A1

公开(公告)日：2025-05-22

申请号：US19033313

申请日：2025-01-21

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： LUIS ALBERTO CAMPOS ,  ZHENSHENG JIA ,  HAIPENG ZHANG ,  MU XU ,  JUNWEN ZHANG

IPC: H04B10/077

Abstract: A fiber-optic network that uses as a hybrid telecommunication and sensing system when telecommunication signals and probe signals are transmitted across a shared fiber strand in either a co-propagated or counter-propagated direction is disclosed. Probe signals generated by a sensing termination system and/or by one or more end devices are used to analyze conditions affecting network hardware and/or events occurring within the fiber distribution area.

公开(公告)号：US20220029708A1

公开(公告)日：2022-01-27

申请号：US17498232

申请日：2021-10-11

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： MU XU ,  ZHENSHENG JIA

IPC: H04B10/61 ,  H04B10/2575 ,  H04L1/00

Abstract: Methods, systems, and devices for a decision directed multi-modulus searching algorithm are described. A receiver may receive a signal including a set of data symbols. The receiver may iteratively determine a set of centroids for demodulating the set of data symbols (e.g., as part of a training procedure). The centroids may be used to demodulate the set of data symbols according to a modulation constellation associated with the set of data symbols. The training procedure may include, for each data symbol of a subset of data symbols, assigning a centroid of the set of centroids to each data symbol and updating the set of centroids based on assigning the centroid to each data symbol. The receiver may demodulate the set of data symbols based on the updated set of centroids.

公开(公告)号：US20200336211A1

公开(公告)日：2020-10-22

申请号：US16855921

申请日：2020-04-22

Applicant: CABLE TELEVISION LABORATORIES, INC

Inventor： HAIPENG ZHANG ,  JUNWEN ZHANG ,  MU XU ,  ZHENSHENG JIA ,  LUIS ALBERTO CAMPOS

IPC: H04B10/50 ,  G02F1/21 ,  G02B27/28 ,  H01S5/323 ,  H01S5/32 ,  H04B10/516 ,  H04B10/25

Abstract: An optical full-field transmitter for an optical communications network includes a primary laser source configured to provide a narrow spectral linewidth for a primary laser signal, and a first intensity modulator in communication with a first amplitude data source. The first intensity modulator is configured to output a first amplitude-modulated optical signal from the laser signal. The transmitter further includes a first phase modulator in communication with a first phase data source and the first amplitude-modulated optical signal. The first phase modulator is configured to output a first two-stage full-field optical signal. The primary laser source has a structure based on a III-V compound semiconductor.

公开(公告)号：US20250007619A1

公开(公告)日：2025-01-02

申请号：US18886474

申请日：2024-09-16

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： HAIPENG ZHANG ,  JUNWEN ZHANG ,  JINGJIE ZHU ,  MU XU ,  ZHENSHENG JIA

IPC: H04B10/69 ,  H04B10/516

Abstract: A method for allocating bandwidth to a first ONU, a second ONU, M1 ONUs, and M2 ONUs includes, during an allocation cycle, (i) granting a respective upstream time slot to, of a plurality of N ONUs, only each of the M1 ONUs, and (ii) granting a first upstream time slot to the first ONU. Each of the M1 ONUs and M2 ONUs is one of the plurality of N ONUs. The method also includes, during a subsequent cycle, (i) granting a respective upstream time slot to, of the plurality of N ONUs, only each of the M2 ONUs. The N ONUs includes a skipped-ONU that is one of either, and not both, the M1 ONUs and the M2 ONUs. The method includes, during the subsequent allocation cycle, granting a second upstream time slot to a second ONU, which is not one of the plurality of N ONUs.

公开(公告)号：US20240405907A1

公开(公告)日：2024-12-05

申请号：US18801036

申请日：2024-08-12

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： MU XU ,  ZHENSHENG JIA ,  HAIPENG ZHANG ,  LUIS ALBERTO CAMPOS

IPC: H04J4/00 ,  H04L5/26

Abstract: A method for extracting a plurality of data streams from a time-frequency division multiplexed (TFDM) signal includes determining a plurality of sub-channels of the TFDM signal, where each of the plurality of sub-channels has a respective one of a plurality of frequency ranges. The method also includes down-converting, based on the plurality of frequency ranges, the TFDM signal into a plurality of down-converted signals, where each down-converted signal corresponds to a respective one of the plurality of sub-channels. The method also includes extracting the plurality of data streams from a respective one of the plurality of down-converted signals.

公开(公告)号：US20250132855A1

公开(公告)日：2025-04-24

申请号：US19001001

申请日：2024-12-24

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： MU XU ,  LUIS ALBERTO CAMPOS ,  CURTIS D. KNITTLE ,  HAIPENG ZHANG ,  ZHENSHENG JIA

IPC: H04J14/02 ,  H04Q11/00

Abstract: A passive optical tap includes a first wavelength division multiplexer (WDM), a second WDM, a first optical splitter, and a second optical splitter. The first wavelength division multiplexer (WDM) has a first plurality of single-channel ports. The second WDM has a second plurality of single-channel ports. The first optical splitter has a first combined-power port optically coupled to a first one of the first plurality of single-channel ports and a first split-power port optically coupled to a first one of the second plurality of single-channel ports. The second optical splitter has a second combined-power port optically coupled to a second one of the second plurality of single-channel ports and a second split-power port optically coupled to a second one of the first plurality of single-channel ports.

公开(公告)号：US20250112725A1

公开(公告)日：2025-04-03

申请号：US18981434

申请日：2024-12-13

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： MU XU ,  ZHENSHENG JIA ,  JUNWEN ZHANG ,  HAIPENG ZHANG ,  LUIS ALBERTO CAMPOS

IPC: H04L1/00 ,  H04L1/20 ,  H04Q11/00

Abstract: Adaptive modulation coding schemes improve spectral efficiency of telecommunication networks by implementing MCSs specific to each of a plurality of end devices in operable communication with a hub. For example, the MCSs may be specific to a channel, a wavelength, a distance, or capabilities of an end device. The MCSs are selected to include the highest modulation format and highest forward error correction coding rate that can be applied to a telecommunication signal without surpassing a signal parameter threshold.

公开(公告)号：US20220407602A1

公开(公告)日：2022-12-22

申请号：US17821316

申请日：2022-08-22

Applicant: Cable Television Laboratories, Inc.

Inventor： MU XU ,  ZHENSHENG JIA ,  JUNWEN ZHANG ,  HAIPENG ZHANG ,  LUIS ALBERTO CAMPOS

IPC: H04B10/2507 ,  H04B10/69 ,  H04Q11/00 ,  H04B10/40

Abstract: An echo cancellation method includes steps of (a) extracting phase-distortion estimates, (b) reconstructing an echo signal, (c) generating a clean signal, and (d) producing a primary signal. Step (a) includes extracting, from a first phase signal, a plurality of phase-distortion estimates, the first phase signal having been estimated from an echo-corrupted signal received at a first coherent transceiver of a coherent optical network. Step (b) includes reconstructing an echo signal from the plurality of phase-distortion estimates and a transmitted signal transmitted by the first coherent transceiver. Step (c) includes generating a clean signal as a difference between the reconstructed echo signal and the first phase signal. Step (d) includes producing a primary signal by mapping each of a plurality of clean-phase estimates of the clean signal to one of a plurality of constellation symbols associated with a modulation scheme of the primary signal.

公开(公告)号：US20220337320A1

公开(公告)日：2022-10-20

申请号：US17854564

申请日：2022-06-30

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： HAIPENG ZHANG ,  JUNWEN ZHANG ,  MU XU ,  ZHENSHENG JIA ,  LUIS ALBERTO CAMPOS

IPC: H04B10/50 ,  G02F1/21 ,  G02B27/28 ,  H01S5/32 ,  H04B10/516 ,  H04B10/25 ,  H01S5/323

Abstract: An optical full-field transmitter for an optical communications network includes a primary laser source configured to provide a narrow spectral linewidth for a primary laser signal, and a first intensity modulator in communication with a first amplitude data source. The first intensity modulator is configured to output a first amplitude-modulated optical signal from the laser signal. The transmitter further includes a first phase modulator in communication with a first phase data source and the first amplitude-modulated optical signal. The first phase modulator is configured to output a first two-stage full-field optical signal. The primary laser source has a structure based on a III-V compound semiconductor.

公开(公告)号：US20220312045A1

公开(公告)日：2022-09-29

申请号：US17839060

申请日：2022-06-13

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： ZHENSHENG JIA ,  LUIS ALBERTO CAMPOS ,  MU XU ,  JING WANG

IPC: H04N19/94 ,  H04N19/126 ,  H03M3/00 ,  H04J14/04 ,  H03M1/00 ,  H03M3/04 ,  H03M1/66 ,  H03M1/12 ,  H03M7/30

Abstract: An optical network includes a transmitting portion configured to (i) encode an input digitized sequence of data samples into a quantized sequence of data samples having a first number of digits per sample, (ii) map the quantized sequence of data samples into a compressed sequence of data samples having a second number of digits per sample, the second number being lower than the first number, and (iii) modulate the compressed sequence of data samples and transmit the modulated sequence over a digital optical link. The optical network further includes a receiving portion configured to (i) receive and demodulate the modulated sequence from the digital optical link, (ii) map the demodulated sequence from the second number of digits per sample into a decompressed sequence having the first number of digits per sample, and (iii) decode the decompressed sequence.