Bridges, A; Yacoot, A; Kissinger, T; Humphreys, D A; Tatam, R P (2021) Correction of periodic displacement non-linearities by two-wavelength interferometry. Measurement Science and Technology, 32 (12). 125202

Brown, T W C; Hudlicka, M; Humphreys, D A; Loh, T H; Wang, M (2021) Metrology for 5G Link Adaptation and Signal-to-Interference-plus-Noise-Ratio. In: Metrology for 5G and Emerging Wireless Technologies. IET, pp. 29-51. ISBN 9781839532788

Yu, H; Wang, C; Humphreys, D A; Lin, M; Ali, L; Meng, F (2020) Analysis of Time and Frequency Response for Single/Multi-Tone Stimulus Harmonic Phase-Reference Based on Prime Number Algorithm. Electronics, 9 (11). 1836 ISSN 2079-9292

Humphreys, D A (2018) Calibration and Extrapolation of Phase-Modulated Comb Phase-Standards. In: 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018), 8-13 July 2018, Paris, France.

Yu, H; Lin, M L; Humphreys, D A; Meng, F Y (2018) Calibration of Multi-Tone Stimulus Harmonic Phase Reference Based on DRTO and Prime Number Algorithm. In: 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018), 8-13 July 2018, Paris, France.

Kataoka, M; Giblin, S P; Fletcher, J D; Johnson, N; Humphreys, D A; See, P; Pepper, M; Griffiths, J P; Jones, G A C; Farrer, I; Aldous, J D; Ritchie, D A (2018) Single-hot-electron wave packets for quantum electrical metrology. In: 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018), 8-13 July 2018, Paris, France.

Brown, T W C; Humphreys, D A; Hudlicka, M; Loh, T H (2018) Prediction of SINR Using BER and EVM for Massive MIMO Applications. In: 12th European Conference on Antennas and Propagation (EuCAP 2018), 9-13 April 2018, London, UK.

Rajabi, M; Humphreys, D A; Avolio, G; Barmuta, P; Lukasik, K R; Nielsen, T S; Schreurs, D M M P (2018) Design and evaluation of nonlinear verification device for nonlinear vector network analyzers. IEEE Transactions on Microwave Theory and Techniques, 66 (2). pp. 1121-1130. ISSN 0018-9480

Zhang, Y C; Guo, X T; Humphreys, D A; Wang, L F; Zhao, W; Zhang, Z L (2018) Extension of NVNA baseband measurement for power amplifier and mixer characterization under complex modulation. IEEE Transactions on Microwave Theory and Techniques, 66 (2). pp. 1131-1141.

Humphreys, D A; Fatadin, I; Bieler, M; Struszewski, P; Hudlicka, M (2017) Optical and RF metrology for 5G. In: 2017 IEEE Photonics Society Summer Topical Meeting Series (SUM), 10-12 July 2017, San Juan, Puerto Rico.

Naftaly, M; Clarke, R G*; Humphreys, D A; Ridler, N M (2017) Metrology state-of-the-art and challenges in braodband phase-sensitive terahertz measurements. Proc. IEEE, 105 (6). pp. 1151-1165.

Johnson, N; Fletcher, J D; Humphreys, D A; See, P; Griffiths, J P*; Jones, G A C*; Farrer, I*; Ritchie, D A*; Pepper, M*; Janssen, T J B M; Kataoka, M (2017) Ultrafast voltage sampling using single-electron wavepackets. Appl. Phys. Lett., 110 (10). 102105

Humphreys, D A; Rajabi, M*; Schreurs, D*; Nielsen, T* (2016) A nonlinear verification device for nonlinear vector network analyzers. In: 2016 Conference on Precision Electromagnetic Measurements (CPEM), 10-15 July 2016, Ottawa, Canada.

Bosi, G*; Raffo, A*; Avolio, G*; Schreurs, D*; Humphreys, D A (2016) Impact of microwave measurement uncertainty on the nonlinear embedding procedure. In: 87th ARFTG Microwave Measurement Conference, 27 May 2016, San Francisco, USA.

Humphreys, D A; Raffo, A*; Bosi, G*; Vannini, G*; Schreurs, D*; Gebremicael, K N*; Morris, K* (2016) Maximizing the benefit of existing equipment for nonlinear and communication measurements. In: 87th ARFTG Microwave Measurement Conference, 27 May 2016, San Francisco, USA.

Hudlicka, M*; Lundstrom, C*; Humphreys, D A; Fatadin, I (2016) BER estimation from EVM for QPSK and 16-QAM coherent optical systems. In: 6th International Conference on Photonics (ICP), 14-16 March 2016, Kuching, Malaysia.

Rajabi, M*; Humphreys, D A; Nielsen, T*; Barmuta, P*; Schreurs, D* (2015) Design and analysis of a verification device for the nonlinear vector network analyzer. In: 85th ARFTG Microwave Measurement Conference Proceedings, 22 May 2015, Phoenix, AZ, USA.

Humphreys, D A; Hudlicka, M*; Fatadin, I (2015) Calibration of wideband digital real-time oscilloscopes. IEEE Trans. Instrum. Meas., 64 (6). pp. 1716-1725.

Humphreys, D A; Harris, P M; Rodriguez-Higuero, M*; Murbarak, F A*; Zhao, D*; Ojasalo, K* (2015) Principal component compression method for covariance matrices used for uncertainty propagation. IEEE Trans. Instrum. Meas., 64 (2). pp. 356-365.

Humphreys, D A; Naftaly, M; Molloy, J F (2014) Effect of time-delay errors on THz spectroscopy dynamic range.

Humphreys, D A; Hudlicka, M*; Fatadin, I (2014) Calibration of wideband digital real-time oscilloscopes. In: 29th Conference on Precision Electromagnetic Measurements (CPEM 2014), 24-29 August 2014, Rio de Janeiro, Brazil.

Humphreys, D A; Naftaly, M (2014) Dynamic range improvement of THz Spectroscopy. In: 29th Conference on Precision Electromagnetic Measurements (CPEM 2014), 24-29 August 2014, Rio de Janeiro, Brazil.

Ojasalo, K*; Hudlicka, M*; Humphreys, D A (2014) Uncertainty of communication signals measurement. In: 29th Conference on Precision Electromagnetic Measurements (CPEM 2014), 24-29 August 2014, Rio de Janeiro, Brazil.

Humphreys, D A; Harris, P M (2014) Guidance for the use of compact covariance uncertainty software. NPL Report. TQE 10

Humphreys, D A; Miall, J (2013) Traceable measurement of source and receiver EVM using a real-time oscilloscope. IEEE Trans. Instrum. Meas., 62 (6). pp. 1413-1416.

Humphreys, D A; Harris, P M; Miall, J M (2012) Instrument related structure in covariance matrices used for uncertainty propagation. In: 42nd European Microwave Conference (EuMC 2012), 29 October - 1 November 2012, Amsterdam, Netherlands.

Humphreys, D A; Harris, P M; Miall, J M (2012) Instrument related structure in covariance matrices used for uncertainty propagation. In: 7th European Microwave Integrated Circuit Conference (EuMIC), 29-30 October 2012, Amsterdam, Netherlands.

Humphreys, D A; Harris, P M; Miall, J M (2012) Instrument related structure in covariance matrices used for uncertainty propagation. In: 2012 7th European Microwave Integrated Circuits Conference (EUMIC), 29-30 October 2012, Amstedam, The Netherlands.

Hudlicka, M*; Salhi, M*; Humphreys, D A (2012) Towards metrological characterization of vector signal analyzers. In: 42nd European Microwave Conference (EuMC 2012), 29 October - 1 November 2012, Amsterdam, Netherlands.

Humphreys, D A; Akmal, A* (2012) Channel timebase errors for digital sampling oscilloscopes. pp. 520-521.

Hale, P D*; Williams, D F*; Dienstfrey, A*; Wang, J; Jargon, J*; Humphreys, D A; Harper, M*; Fuser, H*; Bieler, M* (2012) Traceability of high-speed electrical waveforms at NIST, NPL and PTB. In: 2012 Conference on Precision Electromagnetic Measurements (CPEM 2012), 1-6 July 2012, Washington DC, USA.

Humphreys, D A; Miall, J (2012) Traceable measurement of source and receiver EVM using a real-time oscilloscope. In: 2012 Conference on Precision Electromagnetic Measurements (CPEM 2012), 1-6 July 2012, Washington DC, USA.

Humphreys, D A; Smith, D I* (2009) Two-tone measurement technique for optoelectronic trans-impedance amplifier characterisation. In: 9th Optical Finre Measurement Conference (OFMC 2009), 16-18 September 2009, NPL, UK.

Humphreys, D A; Watkins, G*; Morris, K A*; Miall, J (2008) RF waveform metrology for characterization of non-linear amplifiers. In: 72nd ARFTG Microwave Measurement Symposium, 2008.

Humphreys, D A; Dickerson, R T*; Yanecek, A* (2007) Making traceable EVM measurements with digital oscilloscopes. Agilent Meas. J., 4. pp. 46-51.

Humphreys, D A; Dickerson, R T* (2007) Traceable amplitude modulation measurement using in-phase and quadrature referencin. In: 2007 International Waveform Diversity & Design Conference, 4-8 June 2007, Pisa, Italy.

Humphreys, D A; Harper, M*; Roberts, P* (2007) Traceable amplitude modulation measurement using in-phase and quadrature referencing. In: International Waveform Diversity & Design Conference, 4-8 June 2007, Pisa, Italy.

Humphreys, D A; Dickenson, I R* (2007) Traceable measurement of Error Vector Magnitude (EVM) in WCDMA signals. In: 2007 International Waveform Diversity & Design Conference, 4-8 June 2007, Pisa, Italy.

Humphreys, D A; Grosche, G*; Eggert, M*; Peterson, J C*; Henningsen, J*; Skipper, B F* (2006) Transmission of active and passive optical reference signals over a 16 channel, 534.4 km WDM optical fibre network. IEE Proc., Optoelectron., 153 (5). pp. 256-261.

Humphreys, D A (2006) Vector measurement of modulated RF signals by an in-phase and quadrature referencing technique. IEE Proc. Sci. Meas. Technol., 153 (6). pp. 210-215.

Humphreys, D A; Miall, J (2005) Towards the definition of RF envelope and RF power risetime. In: BEMC 2005 British Electromagnetic Measurements Conference, 14-17 November 2005, NPL, UK.

Humphreys, D A; Miall, J (2005) Traceable RF peak power measurements for mobile communications. IEEE Trans. Instrum. Meas., 54 (2). pp. 680-683.

Humphreys, D A; Grosche, G*; Petersen, J C*; Henningsen, J*; Eggert, M*; Skipper, B F* (2005) Transmission of active optical reference signals over a 16 channel, 534.4 km WDM optical fibre network. In: OFMC 2005 - 7th Optical Fibre Measurement Conference, 21-23 September 2005, NPL. UK.

Humphreys, D A; Harper, M R; Smith, A J A; Smith, I M (2005) Vector calibration of optical reference receivers using a frequency-domain method. IEEE Trans. Instrum. Meas., 54 (2). pp. 894-897.

Humphreys, D A; Tian, Z (2005) Vector measurement of modulated RF signals by an in-phase and quadrature referencing technique. In: BEMC 2005 - British Electromagnetic Measurements Conference, 14-17 November 2005, NPL, UK.

Humphreys, D A; Bernard, F (2005) An assessment of measurement requirements for the optical datacomms industry. In: OFMC 2005 - 7th Optical Fibre Measurement Conference, 21-23 September 2005, NPL, UK.

Humphreys, D A; Bernard, F (2004) An assessment of measurement requirements for the optical datacomms industry. NPL Report. DEM-EM 006

Harper, M R; Smith, A J A; Basu, A; Humphreys, D A (2004) Calibration of a 70 GHz oscilloscope. In: Conference on Precision Electromagnetic Measurements (CPEM) 2004, 27 June - 2 July 2004, London, UK.

Humphreys, D A (2001) Assessment of optical spectrum analyser wavelength drift with temperature. In: OFMC'01 6th Optical Fibre Measurement Conference, 26-28 September 2001, Girton College, Cambridge, UK.

Humphreys, D A; Campbell, C (2001) Preliminary results of L-band exited-state optical frequency reference survey. In: OFMC'01 6th Optical Fibre Measurement Conference, 26-28 September 2001, Girton College, Cambridge, UK.

Humphreys, D A (2001) Synthesis of optical reference frequencies by four-wave mixing in optical fibre. In: OFMC'01 6th Optical Fibre Measurement Conference, 26-28 September 2001, Girton College, Cambridge, UK.

Billington, R; Bongrand, I*; Hallam, A*; Humphreys, D A; Parker, A; Walker, B; Wells, D S (2000) Effective area of single-mode optical fibres - a comparison of four measurement techniques. In: European Conference on Optical Communication (ECOC) 2000, September 2000, Munich, Germany.

Humphreys, D A (2000) Saturated optogalvanic transition in krypton at 1564 nm. NIST Special Publication, 953. pp. 25-28.

Humphreys, D A; Billington, R S; Parker, A; Walker, B; Wells, D S; Hallam, A G*; Bongrand, I* (2000) A comparison of three techniques for effective area measurement of single-mode optical fibres. NIST Special Publication, 953. pp. 61-64.

Humphreys, D A; Howes, J (1997) Accurate wavelength calibration for optical spectrum analysers using an etalon calibration artifact. In: OFMC '97. 4th Optical Fibre Measurement Conf. Digest., 29 September - 1 October 1997, National Physical Laboratory, Teddington.

Humphreys, D A; Howes, J (1997) Overview of wavelength scale calibration methods for optical spectrum analysers. In: OFMC '97. 4th Optical Fibre Measurement Conf. Digest., 29 September-1 October 1997, National Physical Laboratory, Teddington.

Humphreys, D A (1996) Accurate wavelength calibration for optical spectrum analysers. Tech. Digest Opt. Fibre Meas. (904). pp. 97-100.

Knight, D J E*; Zucco, M*; Pharaoh, K I; Humphreys, D A (1995) Frequency measurements on HI and the KR line at 1.548um. In: Proc. EFTF 96, 5 - 7 March 1995, Brighton.

Humphreys, D A; Howes, J (1995) High accuracy optoelectronic device measurement. In: BEMC 95 7th British Electromagnetic Measurements Conference Digest, 6 - 9 November 1995, Malvern.

Gifford, A D; Humphreys, D A; Hale, P D* (1995) A comparison of photodiode frequency response measurements to 40 GHz between NPL and NIST. Electron. Lett., 31 (5). 397 -398

Hale, P D*; Humphreys, D A; Gifford, A D (1994) Photodetector frequency response measurements at NIST, US and NPL, UK: preliminary results of a standards laboratory comparison. Proc. SPIE - Int. Soc. Opt. Eng., 2149. pp. 345-356.

Cox, M G; Harris, P M; Humphreys, D A (1993) An algorithm for the removal of noise and jitter in signals and its application to picosecond electrical measurement. NPL Report. DITC 220/93

Watson, C D*; Humphreys, D A; Wilson, M G F* (1993) Calibration of optical modulators by optical down-conversion. IEEE Photonics Technol. Lett., 5 (9). pp. 1005-1007.

Cox, M G; Harris, P M; Humphreys, D A (1993) An algorithm for the removal of noise and jitter in signals and its application to picosecond electrical measurement. Numer. Algorithms, 5 (1-4). pp. 491-508.