About Me

Dr. Xianqing Jin received BEng in Communications Engineering from Chongqing University of Posts and Telecommunications, Chongqing, China, in 2005. He was awarded a PhD from Bangor University, UK, in 2010. His PhD was awarded for a thesis entitled “Theoretical and Experimental Investigations of Optical OFDM for Local and Access Networks”.  

After his PhD, he worked as a postdoctoral researcher at Bangor University, and continuously developed high-speed real-time optical OFDM modems for practical implementation in optical access networks (European-funded project ALPHA: Architectures for Flexible Photonic Home and Access networks). In addition, he carried out experimental demonstrations of optical OFDMA PONs with adaptive DBA based on real-time optical OFDM transceivers, which is supported by Piano+ funded project OCEAN (OOFDM for Cost Effective Access Networks). From July 2012, He has been with University of Oxford (Department of Engineering Science), working as a postdoctoral researcher on a collaborative EPSRC-funded project involving four leading research institutions (Cambridge, Oxford, Southampton and UCL) in the UK. His current research mainly focuses on the area of space division multiplexing in MMFs/MCFs for future high-capacity optical networks. He has authored or co-authored > 50 peer-reviewed papers, including > 20 journal papers. He holds 2 European/US/UK/China patents on implementation of core functions for high-speed optical OFDM systems, and also submitted one patent application. 



Research interests
1)  Spatial multiplexing in MMFs/FMFs/MCFs,
2)  Application of OFDM in the optical access networks (especially PONs) and optical wireless networks,
3)  OFDM transceiver design for high speed optical communications,
4)  Digital signal processing (DSP) and its implementation on FPGAs for next generation optical networks. 



[1]     Jianming Tang and Xianqing Jin, “Synchronization process in optical frequency division multiplexing transmission systems”, European/US/UK/China patent, EP249473A0, US 2012/0230686 A1, WO 2011/051448, CN 102687478 A,  2009
[2]     Xianqing Jin and Jianming Tang, “Adaptive bit or power loading in high speed optical orthogonal frequency division multiplexing transceivers”, UK patent, GB 2485415 A, 2010.
[3]     Roger Giddings, Jianming Tang and Xianqing Jin, “Multi-band Optical OFDM with Single Upstream Wavelength-supported Colourless Optical Network Units”, UK patent pending, GB1208016.4, 2012.

I  Journals
[1]     E. Hugues-Salas, R. P. Giddings, X. Q. Jin, Y. Hong, T. Quinlan, S. Walker, and J. M. Tang, “REAM intensity modulator-enabled 10Gb/s colorless upstream transmission of real-time optical OFDM signals in a single-fiber-based bidirectional PON architecture” Opt. Express, vol. 20, no. 19, pp. 21089-21100, Aug. 2012.
[2]     X.Q. Jin, and J.M. Tang, “Experimental Investigations of Wavelength Spacing and Colorlessness of RSOA-Based ONUs in Real-Time Optical OFDMA PONs” Photonics Journal, vol. 30, no. 16, pp. 2603-2609, Aug. 2012.
[3]     E. Hugues-Salas, X.Q. Jin, R.P. Giddings, Y. Hong, Sa'ad Mansoor, Asier Villafranca and J.M. Tang, “Directly Modulated VCSEL-Based Real-Time 11.25Gb/s Optical OFDM Transmission Over 2000m Legacy MMFs” Photonics Journal, vol. 4, no. 1, pp. 143-154, Feb. 2012.
[4]     X.Q. Jin, E. Hugues-Salas, R. P. Giddings, J. L. Wei, J. Groenewald and J. M. Tang, “First real-time experimental demonstrations of 11.25Gb/s optical OFDMA PONs with adaptive dynamic bandwidth allocation” Opt. Express, vol. 19, no. 21, pp. 20557-20570, Oct. 2011.
[5]     X.Q. Jin, J. L. Wei, R. P. Giddings, T. Quinlan, S. Walker, and J. M. Tang, “Experimental Demonstrations and Extensive Comparisons of End-to-End Real-Time Optical OFDM Transceivers With Adaptive Bit and/or Power Loading” Photonics Journal, vol. 3, no. 2, pp. 500 - 511, Jun. 2011.
[6]     X.Q. Jin and J.M. Tang, “Optical OFDM synchronization with symbol timing offset and sampling clock offset compensation in real-time IMDD systems” Photonics Journal, vol. 3, no. 2, pp. 187 - 196, Apr. 2011.
[7]     E. Hugues-Salas, R.P. Giddings, X.Q. Jin, J. L. Wei, X. Zheng, Y. Hong, C. Shu and J.M. Tang, “Real-time experimental demonstration of low-cost VCSEL intensity-modulated 11.25Gb/s optical OFDM signal transmission over 25km PON systems,” Optics Express, vol. 19, no. 4, pp. 2979 - 2988, Feb. 2011
[8]     E. Giacoumidis, X.Q. Jin,  A. Tsokanos and J.M. Tang, “Statistical Performance Comparisons of Optical OFDM Adaptive Loading Algorithms in Multimode Fiber-based Transmission Systems” Photonics Journal, vol. 2, no. 6, pp. 1051-1059, Dec. 2010.
[9]     X.Q. Jin, R.P. Giddings, E. Hugues-Salas and J.M. Tang, “Real-time experimental demonstration of optical OFDM symbol synchronization in directly modulated DFB laser-based 25km SMF IMDD systems” Opt. Express, vol. 18, no. 20, pp. 21100-21110, Sep. 2010.
[10]  X. Zheng, X. Q. Jin, R. P. Giddings, J. L. Wei, E. Hugues-Salas, Y. H. Hong and J. M. Tang, “Negative power penalties of optical OFDM signal transmissions in directly modulated DFB laser-based IMDD systems incorporating negative dispersion fibres” Photonics Journal. vol. 2, no. 4, pp. 532–542, Aug. 2010.
[11]  R. P. Giddings, E. Hugues-Salas, X.Q. Jin, J. L. Wei, and J. M. Tang, “Experimental demonstration of real-time optical OFDM transmission at 7.5 Gb/s over 25-km SSMF using a 1-GHz RSOA,” Photon. Technol. Lett., vol. 22, no. 11, pp.745-747, Jun. 2010
[12]  J.L. Wei, E. Hugues-Salas, R.P. Giddings, X.Q. Jin, X. Zheng, S. Mansoor, and J.M. Tang, “Wavelength reused bidirectional transmission of adaptively modulated optical OFDM signals in WDM-PONs incorporating SOA and RSOA intensity modulators” Opt. Express, vol. 18, no. 10, pp. 9791–9808, May 2010.
[13]  X.Q. Jin, R.P. Giddings, E. Hugues-Salas and J.M. Tang, “Real-time demonstration of 128-QAM-encoded optical OFDM transmission with a 5.25bit/s/Hz spectral efficiency in simple IMDD systems utilizing directly modulated DFB lasers” Opt. Express, vol. 17, no. 22, pp. 20484–20493, Oct. 2009.
[14]  R.P. Giddings, X.Q. Jin and J.M. Tang, “First experimental demonstration of 6Gb/s real-time optical OFDM transceivers incorporating channel estimation and variable power loading” Opt. Express, vol. 17, no. 22, pp. 19727–19738, Oct. 2009.
[15]  X.Q. Jin, R.P. Giddings and J.M. Tang, “Real-time transmission of 3Gb/s 16-QAM encoded optical OFDM signals over 75km SMFs with negative power penalties”, Opt. Express, vol. 17, no. 17, pp. 14574-14585, Aug. 2009
[16]  R.P. Giddings, X.Q. Jin and J.M. Tang, “Experimental demonstration of real-time 3Gb/s optical OFDM transceivers” Opt. Express, vol. 17, no. 19, pp. 16654-16665, Sep. 2009
[17]  R.P. Giddings, X.Q. Jin, H.H. Kee, X.L. Yang and J.M. Tang, “Real-time implementation of optical OFDM transmitters and receivers for practical end-to-end optical transmission systems,” Electron. Lett. vol. 45, no. 15, pp. 800-802, Jul. 2009
[18]  J.L. Wei, X.Q. Jin, and J.M. Tang, “The influence of directly modulated DFB lasers on the transmission performance of carrier-suppressed single-sideband optical OFDM signals over IMDD SMF systems,” J. Lightwave. Technol., vol. 27, no. 13, pp. 2412–2419, Jul. 2009.
[19]  X.Q. Jin, and J.M. Tang, “Effectiveness of the use of 3-dB bandwidths of multimode fibres for estimating the transmission performance of adaptively modulated optical OFDM signals over IMDD links,” J. Lightw. Technol., vol.27, no. 18, pp.3992-3998, Sept. 2009.
[20]  X.Q. Jin, J.M. Tang, K. Qiu and P.S. Spencer, “Statistical investigations of the transmission performance of adaptively modulated optical OFDM signals in multimode fibre links,” J. Lightw. Technol., vol.26, no. 18, pp.3216-3224, Sept. 2008.
[21]  E. Giacoumidis, J.L. Wei, X.Q. Jin and J.M. Tang, “Improved transmission performance of adaptively modulated optical OFDM signals over directly modulated DFB laser-based IMDD links using adaptive cyclic prefix,” Opt. Express, vol. 16, no. 13,  pp. 9480-9494, Jun. 2008.
[22]  [Invited] X.Q. Jin, J.M. Tang, P.S. Spencer, and K.A. Shore, “Optimization of adaptively modulated optical OFDM modems for multimode fibre-based local area networks,” J. Optical Netw., vol. 7, no. 3, pp. 198–214, Mar. 2008
[23]  JIN Xian-qing , XU Bo , QIU Kun , TANG Jian-ming , ZHANG Chong-fu, “A novel technique of adaptive power allocation optical OFDM in multimode fiber communication,” J. Optoelectronics & laser, vol.19, no. 3, pp.339-343, Mar. 2008.
II  Conferences

[24]  X.Q. Jin and J.M. Tang, “First Experimental Demonstrations of Real-time Optical OFDMA PONs with Adaptive Dynamic Bandwidth Allocation and Colorless ONUs,” Future Network & Mobile Summit (FutureNetw), Berlin, Germany, Jul. 2012.
[25]  E. Hugues-Salas, X.Q. Jin, R.P. Giddings, Y. Hong, Sa'ad Mansoor, Asier Villafranca and J.M. Tang, “Real-time 11.25Gb/s optical OFDM signal transmission over 2000m legacy MMFs using centre launching,” Future Network & Mobile Summit (FutureNetw), Berlin, Germany, Jul. 2012.
[26]  X.Q. Jin and J.M. Tang, “First Experimental Demonstration of Real-Time Optical OFDMA PONs with Colorless ONUs and Adaptive DBA,” Optical Fiber Communication Conf./National Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2012.
[27]  E. Hugues-Salas, N. Courjault, X.Q. Jin, R.P. Giddings, C. Berthelemot-Aupetit, and J.M. Tang, “Real-Time 11.25Gb/s Optical OFDM Transmission over 2000m Legacy MMFs Utilizing Directly Modulated VCSELs,” Optical Fiber Communication Conf./National Fiber Optic Engineers Conf. (OFC/NFOEC) , Los Angeles, CA, Mar. 2012.
[28]  E. Hugues-Salas, X.Q. Jin, R.P. Giddings, J. L. Wei, C. Shu and J.M. Tang, “First Experimental Demonstration of VCSEL-based Real-Time End-to-End 11.25Gb/s Optical OFDM Signal Transmission Over 800m MMFs” European Conf. and Exhibition on Optical Communication (ECOC), Geneva, Switzerland, Sep. 2011.
[29]  X.Q. Jin, R.P. Giddings and J.M. Tang, “Experimental demonstration of adaptive bit and/or power loading for maximising real-time end-to-end optical OFDM transmission performance,” Optical Fiber Communication Conf./National Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2011.
[30]  E. Giacoumidis, X.Q. Jin and J.M. Tang, “Statistical investigations of optical OFDM adaptive loading algorithm over 1000 worst-case MMFs,” Optical Fiber Communication Conf./National Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2011.
[31]  E. Hugues-Salas, R.P. Giddings, Y. Hong, X.Q. Jin, J. L. Wei, X. Zheng and J.M. Tang, “First experimental demonstration of low-cost VCSEL-intensity modulated end-to-end real-time optical OFDM signal transmission at 11.25Gb/s over 25km SSMFs,” Optical Fiber Communication Conf./National Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2011.
[32]  J.M. Tang, R.P. Giddings, X.Q. Jin, J.L. Wei, X. Zheng, E. Giacoumidis, E. Hugues-Salas, Y. Hong, C. Shu, J. Groenewald and K. Muthusamy, “Real-Time optical OFDM transceivers for PON applications,” Optical Fiber Communication Conf./National Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2011.
[33]  X.Q. Jin and J.M. Tang, “First experimental demonstration of real-time optical OFDM synchronization with sampling clock offset compensation capability in 11.25Gb/s IMDD systems,” Asia Communications and Photonics Conf. and Exhibition (ACP), Shanghai, China, Dec. 2010 (postdeadline paper).
[34]  X.Q. Jin, R.P.Giddings, E. Hugues-Salas and J. M. Tang, “First experimental demonstration of end-to-end real-time optical OFDM symbol synchronization using subtraction and Gaussian windowing in 25km SMF IMDD systems,” European Conf. and Exhibition on Optical Communication (ECOC), Torino, Italy, Sep. 2010.
[35]  J. L. Wei, E. Hugues-Salas, R.P. Giddings, X.Q. Jin, X. Zheng, and J.M. Tang, “Wavelength Reused Bidirectional Adaptively Modulated Optical OFDM Transmission in Colourless WDM-PONs,” European Conf. and Exhibition on Optical Communication (ECOC), Torino, Italy, Sep. 2010. Paper P6.04.
[36]  X. Zheng, X. Q. Jin, R. P. Giddings, J. L. Wei, E. Hugues-Salas, Y. H. Hong and J. M. Tang, “Negative Power Penalty of Optical OFDM Signal Transmission over Directly Modulated DFB Laser-Based IMDD Systems Incorporating Negative Dispersion Fibres,” in Photonics in Switching (PS) Topical Meeting, (OSA, 2010), (Monterey, Florida, USA).
[37]  R. P. Giddings, X. Q. Jin, E. Hugues-Salas, E. Giacoumidis and J. M. Tang, “Experimental demonstration of record high 11.25Gb/s real-time end-to-end optical OFDM transceivers for PONs”, Future Network & Mobile Summit 2010, Florence, Italy, 2010.
[38]  R.P. Giddings, E. Hugues-Salas, X.Q. Jin, J.L. Wei and J. M. Tang, “Experimental Demonstration of Colourless Real-Time End-to-End Optical OFDM Transmission at 7.5Gb/s over 25km SSMF Using a 1GHz RSOA”, Future Network & Mobile Summit 2010, Florence, Italy, 2010.
[39]  J. Wei, E. Hugues-Salas, R.P. Giddings, X. Jin, X. Zheng, J.M. Tang, “Wavelength reused bidirectional transmission of adaptively modulated optical OFDM signals in SOA/RSOA intensity modulator-based WDM-PONs”, Future Network & Mobile Summit 2010, Florence, Italy, 2010
[40]  X.Q. Jin, R.P.Giddings, E. Hugues-Salas and J. M. Tang, “End-to-end real-time demonstration of 128-QAM-encoded optical OFDM transmission with a 5.25bit/s/Hz spectral efficiency over IMDD systems,” Optical Fiber Communication Conf./National Fiber Optic Engineers Conf. (OFC/NFOEC), San Diego, CA, Mar. 2010, Paper OThM2.
[41]  R.P. Giddings, E. Hugues-Salas, X.Q. Jin, J. L. Wei and J.M. Tang, “Colourless real-time optical OFDM end-to-end transmission at 7.5Gb/s over 25km SSMF using 1GHz RSOAs for WDM-PONs,” Optical Fiber Communication Conf./National Fiber Optic Engineers Conf. (OFC/NFOEC), San Diego, CA, Mar. 2010, Paper OMS4.
[42]  R.P. Giddings, X.Q. Jin, X.L. Yang and J.M. Tang, “Demonstration of real-time multi-gigabit optical OFDM modems for access networks,” Asia Communications and Photonics Conf. and Exhibition (ACP), Shanghai, China, Nov. 2009 (invited)
[43]  R.P. Giddings, X.Q. Jin, H.H. Kee, X.L. Yang and J.M. Tang, “First experimental demonstration of real-time optical OFDM transceivers,” European Conf. and Exhibition on Optical Communication (ECOC), Vienna, Austria, Sep. 2009, Paper 6.6.1.
[44]  X.Q. Jin, R.P.Giddings, J. M. Tang and K.A.Shore, “Real-time 3Gb/s 16QAM-encoded optical OFDM transmission over 75km MetroCor SMFs with negative power penalties,” OptoElectronics & Communications Conf. (OECC), Hongkong, China, Jul. 2009, Paper ThPD8 (postdeadline paper)
[45]  R. P. Giddings, X.Q. Jin, H.H. Kee, X.L. Yang and J.M. Tang, “Experimental implementation of real-time optical OFDM modems for optical access networks,” European Workshop on Photonic Solutions for Wireless, Access, and In-house Networks, Duisburg, Germany, May 2009 (invited)
[46]  X.Q. Jin and J.M. Tang, “A simple and accurate approach for estimating the transmission performance of adaptively modulated optical OFDM signals over IMDD MMF links,” Optical Fiber Communication Conf./National Fiber Optic Engineers Conf. (OFC/NFOEC), San Diego, CA, Mar. 2009,  Paper JWA94.
[47]  X.Q. Jin and J.M. Tang, “Statistical investigations of the effectiveness of using 3-dB bandwidths of multimode fibres to quantify the transmission performance of AMOOFDM signals,” 2009 International Conf. on Communications and Mobile Computing (CMC), Kunming, China, Jan. 2009, pp. 521-525.
[48]  X.Q. Jin, J.M. Tang, K. Qiu and P.S. Spencer, “30Gb/s over 300m transmission of adaptively modulated optical OFDM signals in 99.5% of installed MMF links,” Optical Fiber Communication Conf./National Fiber Optic Engineers Conf. (OFC/NFOEC), San Diego, CA, Feb. 2008,  Paper OMU6.
[49]  R. P. Giddings, X.Q. Jin and J.M. Tang, “Demonstration of a non real-time system for transmitting >10Gb/s adaptively modulated optical OFDM signals,” Semiconductor and Integrated Optoelectronics (SIOE), Apr. 2008.
[50]  E. Giacoumidis, J. L. Wei, X.Q. Jin and J.M. Tang, “Influence of adaptive cyclic prefix on the transmission performance of adaptively modulated optical OFDM signals over directly modulated laser-based IMDD links,” Semiconductor and Integrated Optoelectronics (SIOE), Apr. 2008.
[51]  X.Q. Jin and J.M. Tang, “Is the 3-dB fibre bandwidth definition applicable for adaptively modulated optical OFDM signals transmitting over MMF links,” Semiconductor and Integrated Optoelectronics (SIOE), Apr. 2008.