公开(公告)号：US11949783B1

公开(公告)日：2024-04-02

申请号：US18108787

申请日：2023-02-13

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Jing Wang ,  Bernardo Huberman

IPC: H04L9/08 ,  G02F1/313 ,  G06N10/00 ,  H04B10/27 ,  H04B10/50 ,  H04B10/66 ,  H04B10/70

CPC classification number: H04L9/0855 ,  G02F1/313 ,  G06N10/00 ,  H04B10/50 ,  H04B10/66 ,  H04B10/70 ,  H04L9/0819 ,  H04L9/083 ,  H04L9/0894 ,  G02F2201/30 ,  H04B10/27

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：US11799550B2

公开(公告)日：2023-10-24

申请号：US17734338

申请日：2022-05-02

Applicant: CABLE TELEVISION LABORATORIES, INC.

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

IPC: H04B10/2507 ,  H04B10/54 ,  H04B10/69 ,  H03M3/00

CPC classification number: H04B10/2507 ,  H04B10/541 ,  H04B10/697 ,  H03M3/424 ,  H03M3/43

Abstract: An analog signal processor includes a sampling unit configured to (i) filter, in the frequency domain, a received time domain analog signal into a low-frequency end of a corresponding frequency spectrum, (ii) sample the filtered analog signal at a frequency substantially higher than the low-frequency end, and (iii) spread quantization noise over an expanded Nyquist zone of the corresponding frequency spectrum. The processor further includes a noise shaping unit configured to shape the spread quantization noise out of the low-frequency end of the corresponding frequency spectrum such that the filtered analog signal and the shaped quantization noise are substantially separated in the frequency domain, and a quantization unit configured to apply delta-sigma modulation to the filtered analog signal using at least one quantization bit, and output a digitized bit stream that substantially follows the amplitude of the received time domain analog signal.

公开(公告)号：US11546061B2

公开(公告)日：2023-01-03

申请号：US17195215

申请日：2021-03-08

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Junwen Zhang ,  Zhensheng Jia ,  Luis Alberto Campos ,  Haipeng Zhang ,  Mu Xu ,  Jing Wang ,  Curtis Dean Knittle ,  Chuang Zhou

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

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：US20220158732A1

公开(公告)日：2022-05-19

申请号：US17588875

申请日：2022-01-31

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：US11088761B2

公开(公告)日：2021-08-10

申请号：US16847463

申请日：2020-04-13

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：US10972321B2

公开(公告)日：2021-04-06

申请号：US15930098

申请日：2020-05-12

Applicant: CABLE TELEVISION LABORATORIES, INC

Inventor： Jing Wang ,  Luis Alberto Campos ,  Zhensheng Jia

IPC: H04L25/49 ,  H04W88/08 ,  H04B10/2575 ,  H03M3/00 ,  H04B1/00

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：US10951314B2

公开(公告)日：2021-03-16

申请号：US16729960

申请日：2019-12-30

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：US20210028915A1

公开(公告)日：2021-01-28

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：US10757450B2

公开(公告)日：2020-08-25

申请号：US16153692

申请日：2018-10-05

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：US20200235814A1

公开(公告)日：2020-07-23

申请号：US16834631

申请日：2020-03-30

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Jing Wang ,  Zhensheng Jia ,  Luis Alberto Campos

IPC: H04B10/2575 ,  H04J14/02 ,  H04Q11/00 ,  H04W88/08 ,  H04B10/54 ,  H04Q11/02

Abstract: A digital mobile fronthaul (MFH) network includes a baseband processing unit (BBU) having a digitization interface configured to digitize, using delta-sigma digitization, at least one wireless service for at least one radio access technology. The network further includes a transport medium in operable communication with the BBU. The transport medium is configured to transmit a delta-sigma digitized wireless service from the BBU. The network further includes a remote radio head (RRH) configured to operably receive the delta-sigma digitized wireless service from the BBU over the transport medium.