公开(公告)号：US20210119788A1

公开(公告)日：2021-04-22

申请号：US17073207

申请日：2020-10-16

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： JING WANG ,  BERNARDO HUBERMAN

IPC: H04L9/08 ,  G06N10/00 ,  H04B10/70 ,  H04B10/50 ,  H04B10/66 ,  G02F1/313

Abstract: Methods, systems, and devices for quantum key distribution (QKD) in passive optical networks (PONs) are described. A PON may be a point-to-multipoint system and may include a central node in communication with multiple remote nodes. In some cases, each remote node may include a QKD transmitter configured to generate a quantum pulse indicating a quantum key, a synchronization pulse generator configured to generate a timing indication of the quantum pulse, and filter configured to output the quantum pulse and the timing indication to the central node via an optical component (e.g., an optical splitter, a cyclic arrayed waveguide grating (AWG) router). The central node may receive the timing indications and quantum pulses from multiple remote nodes. Thus, the central node and remote nodes may be configured to communicate data encrypted using quantum keys.

公开(公告)号：US20200374009A1

公开(公告)日：2020-11-26

申请号：US16989572

申请日：2020-08-10

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： JING WANG ,  LUIS ALBERTO CAMPOS ,  ZHENSHENG JIA ,  CURTIS DEAN KNITTLE

IPC: H04B10/2507 ,  H03M3/00

Abstract: A baseband processing unit includes a baseband processor configured to receive a plurality of component carriers of a radio access technology wireless service, and a delta-sigma digitization interface configured to digitize at least one carrier signal of the plurality of component carriers into a digitized bit stream, for transport over a transport medium, by (i) oversampling the at least one carrier signal, (ii) quantizing the oversampled carrier signal into the digitized bit stream using two or fewer quantization bits.

公开(公告)号：US20200295834A1

公开(公告)日：2020-09-17

申请号：US16760098

申请日：2018-11-05

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： LUIS ALBERTO CAMPOS ,  ZHENSHENG JIA ,  JING WANG

IPC: H04B10/2575 ,  H04J14/02 ,  H04B10/532 ,  H04B10/61

Abstract: An optical access network includes an optical hub having at least one processor, and a plurality of optical fiber strands. Each optical fiber strand has a first strand end connected to the optical hub. The network further includes a plurality of nodes connected to at least one segment of a first fiber strand of the plurality of optical fiber strands. Each node is sequentially disposed at respective locations along the first fiber strand at different differences from the optical hub, respectively. The network further includes a plurality of end-points. Each end-point includes a receiver. Each respective receiver (i) has a different optical signal-to-noise ratio (OSNR) from the other receivers, (ii) is operably coupled with at least one node of the plurality of nodes, and (iii) is configured to receive the same optical wavelength signal from the first fiber strand as received by the other receivers.

公开(公告)号：US20220303102A1

公开(公告)日：2022-09-22

申请号：US17838659

申请日：2022-06-13

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：US20210119787A1

公开(公告)日：2021-04-22

申请号：US17073187

申请日：2020-10-16

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： BERNARDO HUBERMAN ,  JING WANG ,  ROBERT M. LUND

IPC: H04L9/08

Abstract: Methods, systems, and devices for quantum key distribution (QKD) in passive optical networks (PONs) are described. A PON may be a point-to-multipoint system and may include a central node in communication with multiple remote nodes. In some cases, each remote node may include a QKD transmitter configured to generate a quantum pulse indicating a quantum key, a synchronization pulse generator configured to generate a timing indication of the quantum pulse, and filter configured to output the quantum pulse and the timing indication to the central node via an optical component (e.g., an optical splitter, a cyclic arrayed waveguide grating (AWG) router). The central node may receive the timing indications and quantum pulses from multiple remote nodes. Thus, the central node and remote nodes may be configured to communicate data encrypted using quantum keys.

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.