公开(公告)号：US11564020B1

公开(公告)日：2023-01-24

申请号：US17336110

申请日：2021-06-01

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Mu Xu ,  Luis Alberto Campos ,  Zhensheng Jia ,  Lin Cheng

IPC: H01Q3/26 ,  H04Q11/00 ,  H01Q3/34 ,  H04J14/02 ,  H04B10/25 ,  H04B10/11 ,  H01Q5/25

Abstract: A radio frequency (RF) beam transmission component having optical inputs and electrical outputs may include a wavelength selective switch (WSS) that has a plurality of optical WSS outputs. Each optical WSS output may be configured to transmit one or more wavelengths of the incoming optical signals. The RF beam transmission component may include a plurality of photodetectors (PD), each photodetector having an optical PD input coupled to one or more of said plurality of optical WSS outputs and a corresponding electrical output of a plurality of PD electrical outputs. The RF beam transmission component may further include a lens that has a plurality of electrical inputs and each electrical input may be electrically coupled to at least one of the plurality of electrical PD outputs. The lens may further have a plurality of electrical lens output ports.

公开(公告)号：US11563508B1

公开(公告)日：2023-01-24

申请号：US17498442

申请日：2021-10-11

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Mu Xu ,  Ruoyu Sun ,  Balkan Kecicioglu ,  Junwen Zhang ,  Haipeng Zhang ,  Zhensheng Jia ,  Luis Alberto Campos

IPC: H04J14/02 ,  H04Q11/00 ,  H04B10/11 ,  H04B10/2575

Abstract: A communications network includes a central communication unit, an optical transport medium, and a plurality of remote radio base stations. The central communication unit generates, within a selected millimeter-wave frequency band, a plurality of adjacent two-tone optical frequency conjugate pairs. Each conjugate pair includes a first optical tone carrying a modulated data signal, and a second optical tone carrying a reference local oscillator signal. The optical transport medium transports the plurality of two-tone conjugate pairs to the plurality of radio base stations, and each base station receives at least one conjugate pair at an optical front end thereof. The optical front end separates the first optical tone from the second optical tone, and converts the first optical tone into a millimeter-wave radio frequency electrical signal. The base station further includes a radio antenna system for wirelessly transmitting the millimeter-wave radio frequency electrical signal to at least one wireless receiving device.

公开(公告)号：US11539442B1

公开(公告)日：2022-12-27

申请号：US17453480

申请日：2021-11-03

Applicant: Cable Television Laboratories, Inc.

Inventor： Mu Xu ,  Zhensheng Jia ,  Luis Alberto Campos ,  Chris Stengrim

IPC: H04B10/564 ,  H04B10/54 ,  H04B10/50

Abstract: A method for automatic power and modulation management in a communication network includes (1) generating a management function of (a) mutual information per symbol (MIPS) of the communication network and (b) output power (P) of a transmitter of the communication network, determining a selected MIPS value and a selected P value which achieve a maximum value of the management function, and causing the transmitter of the communication network to operate according to the selected MIPS value and the selected P value.

公开(公告)号：US11469825B2

公开(公告)日：2022-10-11

申请号：US17397594

申请日：2021-08-09

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Chuang Zhou ,  Zhensheng Jia ,  Luis Alberto Campos ,  Curtis Dean Knittle ,  Jing Wang

IPC: H04J14/00 ,  H04B10/50 ,  H04B10/63 ,  H04B10/532 ,  H04B10/64 ,  H04J14/06 ,  H04J14/04

Abstract: An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.

公开(公告)号：US11451020B2

公开(公告)日：2022-09-20

申请号：US16252233

申请日：2019-01-18

Applicant: Cable Television Laboratories, Inc.

Inventor： Luis Alberto Campos ,  Thomas Holtzman Williams ,  Zhensheng Jia

IPC: H02G1/16 ,  H01R24/56 ,  H04L12/28 ,  H04H60/93 ,  H02G1/08 ,  G02B6/50 ,  H02G1/12

Abstract: Generating an assessment of the suitability of cables, ducts, tubes, pipes and/or other hollow-type of conduits to extraction of cores, conductors, insulation, etc. included therein while still buried in the ground or otherwise positioned out-of-sight so as to be unavailable for visual and/or physical inspection is contemplated. The assessment may be used to indicate a suitability of a cable buried in the ground of a hybrid fiber coaxial (HFC) cable plant to extraction of the type whereby a core of the cable may be extracted using hydraulics while still buried.

公开(公告)号：US11431414B1

公开(公告)日：2022-08-30

申请号：US17201452

申请日：2021-03-15

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Lin Cheng ,  Luis Alberto Campos ,  Jing Wang ,  Zhensheng Jia

IPC: H04B10/00 ,  H04B10/2575 ,  H04B10/27 ,  H04J99/00 ,  H04W72/08 ,  H04W72/04 ,  H04J14/00

Abstract: A resource allocation method is provided for a non-orthogonal multiple access distribution of access network users communicatively coupled to a single transport medium. The method includes steps of allocating a first frequency and time domain resource to a first user and a second frequency and time domain resource to a second user of the access network users, obtaining channel information regarding a particular communication channel of the access network for which resources are allocated, grouping the first user with the second user based on an overlap of the first frequency and time domain resource with the second frequency and time domain resource, and assigning the first user to a different power allocation resource than the second user within the frequency and time domain overlap.

公开(公告)号：US11363304B2

公开(公告)日：2022-06-14

申请号：US17001557

申请日：2020-08-24

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.

公开(公告)号：US11362797B2

公开(公告)日：2022-06-14

申请号：US17068474

申请日：2020-10-12

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Zhensheng Jia ,  Luis Alberto Campos ,  Curtis Dean Knittle ,  Jing Wang

IPC: H04L5/02 ,  H04H20/69 ,  H04L12/28 ,  H04H20/78 ,  H04N21/61

Abstract: An optical network includes a transmitter portion configured to transmit a digitized stream of symbols over a digital optical link, a mapping unit disposed within the transmitter portion and configured to code the transmitted digitized stream of symbols with a mapping code prior to transmission over the digital optical link, a receiver portion configured to recover the coded stream of symbols from the digital optical link, and a demapping unit disposed within the receiver portion and configured to map the recovered coded stream of symbols into an uncoded digitized signal corresponding to the digitized stream of symbols at the transmitter portion prior to coding by the mapping unit.

公开(公告)号：US11362756B2

公开(公告)日：2022-06-14

申请号：US17208697

申请日：2021-03-22

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Zhensheng Jia ,  Luis Alberto Campos ,  Curtis Dean Knittle

IPC: H04B10/00 ,  H04J14/02 ,  H04J14/08

Abstract: An optical network communication system utilizes a passive optical network including an optical hub having an optical line terminal, downstream transmitter, an upstream receiver, a processor, and a multiplexer. The upstream receiver includes a plurality of TWDMA upstream subreceivers. The system includes a power splitter for dividing a coherent optical signal from the optical hub into a plurality of downstream wavelength signals, a long fiber to carry the coherent optical signal between the optical hub and the power splitter, and a plurality of serving groups. Each serving group includes a plurality of optical network units configured to (i) receive at least one downstream wavelength signal, and (ii) transmit at least one upstream wavelength signal. The system includes a plurality of short fibers to carry the downstream and upstream wavelength signals between the power splitter and the optical network units, respectively. Each upstream subreceiver receives a respective upstream wavelength signal.

公开(公告)号：US11251947B1

公开(公告)日：2022-02-15

申请号：US16870781

申请日：2020-05-08

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Jing Wang ,  Bernardo Huberman ,  Luis Alberto Campos ,  Zhensheng Jia

IPC: H04L29/06 ,  H04L9/08 ,  H04L9/14 ,  H04B10/27

Abstract: A method for quantum-key-distribution-based encrypted data transmission in an optical/radio-access network, having a plurality of end nodes, includes, at a first node of the network: (a) via an optical quantum channel, exchanging photonic qubits with a second node, wherein the photonic qubits are processable to derive therefrom an initial key such that each of the first and second nodes have a copy of the initial key, (b) via a classical channel, exchanging a series of encrypted keys with the second node, wherein a first encrypted key is encrypted by the initial key, and each subsequent encrypted key is encrypted by a preceding encrypted key, and (c) via the classical channel, exchanging encrypted data with the second node, wherein the encrypted data is encrypted by a last encrypted key in the series of encrypted keys. One, but not both, of the first and second nodes is an end node.