Inventor · disambiguated record
Junqiang Hu
Also filed as: HU JUNQIANG · HU JUNQIANG NOCHUR
54 granted patents·18 pending applications·183 citations·filing 2007–2025
97Inventor score
Top patents by PatentIndex Score
72 records- 0197US11566937B2Rayleigh fading mitigation via short pulse coherent distributed acoustic sensing with multi-location beating-term combinationNEC LAB AMERICA INC·Filed 2020·Granted Jan 31, 2023·4 cites·2 claims
- 0297US11391622B2Optical fiber sensing system with reduced spatial resolution and noise for multiple application usesNEC LAB AMERICA INC·Filed 2020·Granted Jul 19, 2022·5 cites·4 claims
- 0393US11054303B2Uni-directional signal transmit method using distributed fiber sensingNEC LAB AMERICA INC·Filed 2020·Granted Jul 6, 2021·3 cites·10 claims
- 0492US9654852B2Scalable hybrid packet/circuit switching network architectureNEC LAB AMERICA INC·Filed 2014·Granted May 16, 2017·12 cites·18 claims
- 0592US8098990B2System and method for providing wireless over a passive optical network (PON)HU JUNQIANG·Filed 2007·Granted Jan 17, 2012·21 cites·16 claims
- 0691US8233809B2Polarization independent frequency domain equalization (FDE) for chromatic dispersion (CD) compensation in PolMux coherent systemsQIAN DAYOU·Filed 2009·Granted Jul 31, 2012·15 cites·1 claims
- 0791US7978975B2Passive optical network system employing sub-carrier multiplexing and orthogonal frequency division multiple access modulation schemesNEC LAB AMERICA INC·Filed 2008·Granted Jul 12, 2011·16 cites·20 claims
- 0890US8781326B2Energy efficient OFDM transceiverHU JUNQIANG·Filed 2012·Granted Jul 15, 2014·13 cites·18 claims
- 0989US11698289B2Method providing increased signal-to-noise (SNR) for coherent distributed acoustic sensingNEC LAB AMERICA INC·Filed 2021·Granted Jul 11, 2023·1 cites·3 claims
- 1089US8000604B2Orthogonal frequency division multiple access (OFDMA) based passive optical network (PON) architecture and its extension to long distanceNEC LAB AMERICA INC·Filed 2008·Granted Aug 16, 2011·13 cites·14 claims
- 1187US8233797B2Single wavelength source-free OFDMA-PON communication systems and methodsQIAN DAYOU·Filed 2009·Granted Jul 31, 2012·11 cites·20 claims
- 1286US9450612B2Encoding method and system for quasi-cyclic low-density parity-check codeNEC LAB AMERICA INC·Filed 2014·Granted Sep 20, 2016·10 cites·14 claims
- 1384US9414135B2Flexible-client, flexible-line interface transponderNEC LAB AMERICA INC·Filed 2014·Granted Aug 9, 2016·6 cites·8 claims
- 1483US10797789B2Distributed fiber sensing interrogator with detachable endNEC LAB AMERICA INC·Filed 2019·Granted Oct 6, 2020·2 cites·5 claims
- 1583US9369409B2End-to-end hitless protection in packet switched networksNEC LAB AMERICA INC·Filed 2014·Granted Jun 14, 2016·8 cites·18 claims
- 1682US8184973B2Direct detection for receiving polarization multiplexing signalsQIAN DAYOU·Filed 2009·Granted May 22, 2012·9 cites·13 claims
- 1782US8023824B2Wavelength division multiplexed passive optical networkNEC LAB AMERICA INC·Filed 2008·Granted Sep 20, 2011·9 cites·20 claims
- 1879US12025488B2Two stage processing distributed fiber optic sensing (DFOS) interrogator for acoustic modulated signalsNEC LAB AMERICA INC·Filed 2023·Granted Jul 2, 2024·0 cites·3 claims
- 1979US8260140B2WDM passive optical network with parallel signal detection for video and data deliveryLUO YUANQIU·Filed 2007·Granted Sep 4, 2012·7 cites·6 claims
- 2077US12480808B2Laser frequency drift compensation in forward distributed acoustic sensingNEC LAB AMERICA INC·Filed 2024·Granted Nov 25, 2025·0 cites·5 claims
- 2177US9094148B2Adaptive optical amplifier for WDM systemsNEC LAB AMERICA INC·Filed 2014·Granted Jul 28, 2015·4 cites·18 claims
- 2275US9544667B2Burst switching system using optical cross-connect as switch fabricNEC LAB AMERICA INC·Filed 2014·Granted Jan 10, 2017·3 cites·20 claims
- 2369US2021318162A1Two stage processing distributed fiber optic sensing (dfos) interrogator for acoustic modulated signalsNEC LAB AMERICA INC·Filed 2021·Application pending·0 cites
- 2468US11543285B2Distributed optical fiber sensing using point sensorsNEC LAB AMERICA INC·Filed 2021·Granted Jan 3, 2023·0 cites·14 claims
- 2568US8213794B2Programmable optical network architectureWEI WEI·Filed 2009·Granted Jul 3, 2012·3 cites·3 claims
- 2666US11733088B2Spatial averaging method for coherent distributed acoustic sensingNEC LAB AMERICA INC·Filed 2021·Granted Aug 22, 2023·0 cites·9 claims
- 2766US11664893B2Suppressed out-of-band level for increasing loss margin and stable ABC operation of coded DFOS systemNEC LAB AMERICA INC·Filed 2022·Granted May 30, 2023·0 cites·2 claims
- 2866US2025369779A1Signal interleaving method in multi-band das using correlation-based polarizationNEC LAB AMERICA INC·Filed 2025·Application pending·0 cites
- 2966US2025369795A1Efficient processing resource usage in long range, multi-band backscattering fiber sensingNEC LAB AMERICA INC·Filed 2025·Application pending·0 cites
- 3065US2023375398A1Multi-band das with enhanced snr, increased sampling rate and minimized inter-location interferenceNEC LAB AMERICA INC·Filed 2023·Application pending·0 cites
- 3164US8880985B2High-speed long codeword QC-LDPC soft decision decoderNEC LAB AMERICA INC·Filed 2012·Granted Nov 4, 2014·3 cites·13 claims
- 3264US2024302225A1Automatic calibration for backscattering-based distributed temperature sensorNEC LAB AMERICA INC·Filed 2024·Application pending·0 cites
- 3363US11692867B2Polarization diversity combining method in coherent DAS maintaining phase continuityNEC LAB AMERICA INC·Filed 2021·Granted Jul 4, 2023·0 cites·2 claims
- 3463US2025123127A1Cascaded dfos to reduce system cost and increase sensing reachNEC LAB AMERICA INC·Filed 2024·Application pending·0 cites
- 3562US9025467B2Hitless protection for traffic received from 1+1 protecting line cards in high-speed switching systemsHU JUNQIANG·Filed 2012·Granted May 5, 2015·1 cites·22 claims
- 3662US8718490B2Coherent optical orthogonal frequency division multiplexing (OFDM) reception using self optical carrier extractionXU LEI·Filed 2008·Granted May 6, 2014·2 cites·8 claims
- 3762US2023152152A1Automatic fiber end point detection using coherent optical time domain reflectometryNEC LAB AMERICA INC·Filed 2022·Application pending·0 cites
- 3860US9002195B2Solution for hitless protection in high-speed OTN framer and front-endNEC LAB AMERICA INC·Filed 2012·Granted Apr 7, 2015·1 cites·14 claims
- 3960US2025384005A1Heterogeneous computation platform for high definition distributed acoustic fiber sensingNEC LAB AMERICA INC·Filed 2025·Application pending·0 cites
- 4060US2025286623A1DYNAMIC SEGMENTED DFOS OPERATION ON BIDIRECTIONAL WDM MULTI-SPAN FIBER LINKS USING FIBER NETWORK ROADMsNEC LAB AMERICA INC·Filed 2025·Application pending·0 cites
- 4159US11736867B2Active microphone for increased DAS acoustic sensing capabilityNEC LAB AMERICA INC·Filed 2022·Granted Aug 22, 2023·0 cites·9 claims
- 4259US11674827B2Saturation caused phase jump avoidance in DASNEC LAB AMERICA INC·Filed 2021·Granted Jun 13, 2023·0 cites·4 claims
- 4358US10010732B2Apparatus, methods, and systems for monitoring fire extinguisher operational readinessNEC LAB AMERICA INC·Filed 2017·Granted Jul 3, 2018·0 cites·19 claims
- 4458US8169683B2Optical signal generation with D/A converters and optical clock pulse streamHU JUNQIANG·Filed 2009·Granted May 1, 2012·1 cites·16 claims
- 4557US2021356317A1Complex and phase domain vibration strength estimation for coherent distributed acoustic sensingNEC LAB AMERICA INC·Filed 2021·Application pending·0 cites
- 4654US12256002B2Physimetric-based data security for coded distributed temperature sensingNEC LAB AMERICA INC·Filed 2022·Granted Mar 18, 2025·0 cites·3 claims
- 4754US11131578B2Two stage detection method for distributed vibration detectionNEC LAB AMERICA INC·Filed 2019·Granted Sep 28, 2021·0 cites·10 claims
- 4853US12078526B2Reduced complexity polarization combining method for coherent DASNEC LAB AMERICA INC·Filed 2021·Granted Sep 3, 2024·0 cites·5 claims
- 4953US10010733B2Networked systems for monitoring fire extinguisher operational readinessNEC LAB AMERICA INC·Filed 2017·Granted Jul 3, 2018·0 cites·8 claims
- 5053US9479446B2Hitless service in a variable rate optical transponderNEC LAB AMERICA INC·Filed 2014·Granted Oct 25, 2016·0 cites·7 claims
Showing the top 50 of 72 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →