公开(公告)号：US11863297B1

公开(公告)日：2024-01-02

申请号：US17861613

申请日：2022-07-11

Applicant: CABLE TELEVISION LABORATORIES, INC.

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

IPC: H04J14/06 ,  H04B10/61 ,  H04B10/67

CPC classification number: H04J14/06 ,  H04B10/614 ,  H04B10/6162 ,  H04B10/6165 ,  H04B10/6166 ,  H04B10/677

Abstract: A digital receiver is configured to process a polarization multiplexed carrier from a communication network. The polarization multiplexed carrier includes a first polarization and a second polarization. The receiver includes a first lane for transporting a first input signal of the first polarization, a second lane for transporting a second input signal of the second polarization, a dynamic phase noise estimation unit disposed within the first lane and configured to determine a phase noise estimate of the first input signal, a first carrier phase recovery portion configured to remove carrier phase noise from the first polarization based on a combination of the first input signal and a function of the determined phase noise estimate, and a second carrier phase recovery portion configured to remove carrier phase noise from the second polarization based on a combination of the second input signal and the function of the determined phase noise estimate.

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：US20230336247A1

公开(公告)日：2023-10-19

申请号：US18214142

申请日：2023-06-26

Applicant: CABLE TELEVISION LABORATORIES, INC.

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

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

CPC classification number: H04B10/504 ,  H04J14/04 ,  H04B10/506 ,  H04B10/505 ,  H04B10/502 ,  H04B10/63 ,  H04B10/64 ,  H04B10/532 ,  H04J14/06

Abstract: A transmitter for an optical communication network includes a primary laser source input substantially confined to a single longitudinal mode, an input data stream, and a modulator including at least one secondary laser having a resonator frequency of the single longitudinal mode of the primary laser source. The modulator is configured to receive the primary laser source input and the input data stream, and output a laser modulated data stream.

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：US20220239377A1

公开(公告)日：2022-07-28

申请号：US17723025

申请日：2022-04-18

Applicant: CABLE TELEVISION LABORATORIES, INC.

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

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

Abstract: An injection locked transmitter for an optical communication network includes a primary seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one secondary laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the primary seed laser source. The laser injected modulator is configured to receive the primary 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：US10958371B2

公开(公告)日：2021-03-23

申请号：US16657781

申请日：2019-10-18

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：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：US20200267031A1

公开(公告)日：2020-08-20

申请号：US16866398

申请日：2020-05-04

Applicant: CABLE TELEVISION LABORATORIES, INC

Inventor： Mu Xu ,  Zhensheng Jia ,  Peng-Chun Peng ,  Siming Liu ,  Feng Lu ,  Curtis Dean Knittle

IPC: H04L25/03 ,  H04B10/54 ,  H04B10/69 ,  H04L25/06 ,  H04B10/50

Abstract: An optical network includes a transmitter portion configured to (i) precode an input digitized stream of symbols into a precoded symbol stream, (ii) pulse shape the precoded symbol stream with an eigenvalue channel matrix, and (iii) transmit the pulse shaped symbol stream over a digital optical link. The optical network further includes a receiver portion configured to (i) recover the pulse shaped symbol stream from the digital optical link, (ii) decompose eigenvalues of the eigenvalue channel matrix from the recovered symbol stream, and (iii) decode the decomposed symbol stream into an output symbol stream.