Professor Tim O'Farrell

PhD, MSc, BSc

Department of Electronic and Electrical Engineering

Chair in Wireless Communication

Communications Research Group

Headshot of Tim O'Farrell
t.ofarrell@sheffield.ac.uk
+44 114 222 5193

Full contact details

Professor Tim O'Farrell
Department of Electronic and Electrical Engineering
Profile

I received my BSc degree in Electrical and Electronic Engineering from the University of Birmingham and my MSc and PhD degrees in Electrical and Electronic Engineering from the University of Manchester, respectively.

Currently, I am Chair Professor of Wireless Communications at the University of Sheffield.

My research is focused on wireless communications systems specialising in physical layer signal processing, radio resource management and wireless network planning.

I have pioneered research on energy efficient mobile cellular communications, the mathematical modelling of CSMA based MAC protocols for WiFi, iterative block coding for wireless communication systems and spreading sequence design for CDMA wireless communications.

I was an entrepreneur, being the cofounder and CTO of Supergold Communication Limited (1997-2007), a start-up that participated in the standardisation of IEEE 802.11g with the M-ary Bi-Code Keying proposal.

In the framework of Mobile VCE, I was the Academic Coordinator of the Core 5 Green Radio project (2009-2012) and a leader in establishing energy efficiency as a global research field in wireless communications systems.

I have led 21 major research projects as the principal investigator and participated in 2 as a coinvestigator with a total research spend of approximately £12M.

My current EPSRC project portfolio includes the FARAD and SERAN projects as well as CommNet2.

I have published 312 journal & conference papers, book chapters, patents and technical reports; graduated 23 Ph.D. and M.Phil. students; and participated in standards, consultancy and expert witness activities within the wireless sector.

Currently, I am leading the UK Research Strategy Community Organisation in Communications, Mobile Computing and Networking within the EPSRC portfolio.

I am also a Director of the mVCE, a Chartered Engineer and a member of the IET and IEEE.

Qualifications
  • PhD Electrical and Electronic Engineering, University of Manchester
  • MSc Electrical and Electronic Engineering, University of Manchester
  • BSc Electrical and Electronic Engineering, University of Birmingham
Research interests
  • Multiple-access (OFDMA, CDMA & MC-CDMA)
  • Forward error correction coding and iterative decoding
  • Adaptive coding and modulation
  • MIMO and Massive MIMO techniques
  • Spreading sequence design
  • Wireless visible light communication
  • Energy and spectrum efficient wireless networking
  • MAC and packet scheduling techniques
  • Radio access network planning and optimisation (2G, 3G, 4G & 5G)
  • Large scale dynamic system level simulation (WCDMA, HSPA, LTE, LTE-Advance, 5G)
  • Video quality of service
Publications

Journal articles

Chapters

Conference proceedings papers

  • Henthorn S, O'Farrell T, Asif SM, Anbiyaei MR & Ford KL (2020) Tri-band Single Chain Radio Receiver for Concurrent Radio. 2020 2nd 6G Wireless Summit (6G SUMMIT), 17 March 2020 - 20 March 2020. RIS download Bibtex download
  • Asif SM, Naji A, Anbiyaei MR, Ford KL, O'Farrell T & Langley RJ (2019) Planar Frequency-Tunable Quad-Band Antenna with Independently Controllable Bands. 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 7 July 2019 - 12 July 2019. View this article in WRRO RIS download Bibtex download
  • Asif SM, Anbiyaei MR, Naji A, Ford KL, O'Farrell T & Langley RJ (2019) Tuning Range Enhancement of a Frequency-Agile Tri-band Slot Antenna. 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 7 July 2019 - 12 July 2019. View this article in WRRO RIS download Bibtex download
  • Bui T-C, Singh R, O'Farrell T & Biagi M (2018) Performance Evaluation of Generalized Optical Spatial Modulation with Dimming Support. 2018 IEEE Globecom Workshops (GC Wkshps), 9 December 2018 - 13 December 2018. RIS download Bibtex download
  • Fu H & O'Farrell T (2018) An Energy Efficiency Evaluation Framework for Radio Access Networks. 2018 International Conference on Information and Communication Technology Convergence (ICTC), 17 October 2018 - 19 October 2018. RIS download Bibtex download
  • Singh R, Pergoloni S, O'Farrell T, Scarano G, David J, Biagi M & IEEE (2018) White Light Constrained Multi-Primary Modulation for Visible Light Communication. 2017 IEEE GLOBECOM WORKSHOPS (GC WKSHPS) View this article in WRRO RIS download Bibtex download
  • Henthorn S, Ford KL & O'Farrell T (2018) A low-complexity array of directly phase modulating antennas. 12th European Conference on Antennas and Propagation (EuCAP 2018) RIS download Bibtex download
  • Bai Q, Li L, Asif SM, Singh R, Ford KL, Langley RJ & O'Farrell T (2018) 5G reconfigurable antennas. IET Conference Publications, Vol. 2018(CP741) RIS download Bibtex download
  • Henthorn S, Ford KL & O'Farrell T (2017) A low-loss reconfigurable Frequency Selective Surface based antenna for Direct Antenna Modulation. Loughborough Antennas & Propagation Conference (LAPC 2017) View this article in WRRO RIS download Bibtex download
  • Singh R, Bai Q, O'Farrell T, Ford KL & Langley RJ (2017) Concurrent, Multi-Band, Single-Chain Radio Receiver for High Data-Rate HetNets. 2017 IEEE 86th Vehicular Technology Conference (VTC-Fall), 24 September 2017 - 27 September 2017. View this article in WRRO RIS download Bibtex download
  • O'Farrell T, Singh R, Bai Q, Ford KL, Langley R, Beach M, Arabi E, Gamlath C & Morris KA (2017) Tunable, concurrent multiband, single chain radio architecture for low energy 5G-RANs. 2017 15th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt), 15 May 2017 - 19 May 2017. View this article in WRRO RIS download Bibtex download
  • Singh R, Bai Q, O'Farrell T, Ford KL & Langley RJ (2017) Concurrent, Tunable, Multi-Band, Single Chain Radio Receivers for 5G RANs. 2017 IEEE 85th Vehicular Technology Conference (VTC Spring), 4 June 2017 - 7 June 2017. View this article in WRRO RIS download Bibtex download
  • Henthorn S, Ford KL & O'Farrell T (2017) Frequency selective surface loaded antenna for direct antenna modulation. 2017 11th European Conference on Antennas and Propagation (EUCAP), 19 March 2017 - 24 March 2017. View this article in WRRO RIS download Bibtex download
  • Henthorn S, Ford L & O'Farrell T (2017) Direct Antenna Modulation with Frequency Selective Surfaces. 5th Colloquium on Antennas, Wireless and Electromagnetics (CAWE 2017) RIS download Bibtex download
  • Bai Q, Singh R, Ford KL, Langley RJ & O'Farrell T (2016) Tuneable dual-band antenna for sub 1 GHz cellular mobile radio applications. 2016 Loughborough Antennas & Propagation Conference (LAPC), 14 November 2016 - 15 November 2016. View this article in WRRO RIS download Bibtex download
  • Singh R, Bai Q, O'Farrell T, Ford KL & Langley RJ (2016) Demonstration of RF Digitising Concurrent Dual-Band Receiver for Carrier Aggregation over TV White Spaces. 2016 IEEE 84th Vehicular Technology Conference (VTC-Fall), 18 September 2016 - 21 September 2016. View this article in WRRO RIS download Bibtex download
  • Singh R, O'Farrell T & David JPR (2015) Analysis of forward error correction schemes for colour shift keying modulation. 2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 30 August 2015 - 2 September 2015. RIS download Bibtex download
  • Abukharis S, MacKenzie R & O'Farrell T (2015) Non-saturated throughput analysis for a QoS differentiated p-persistent CSMA protocol with the capture effect. 2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 30 August 2015 - 2 September 2015. RIS download Bibtex download
  • Arbi A & O'Farrell T (2015) A comparative study of energy efficiency between MIMO and SISO based LTE RANs. 2015 IEEE International Conference on Communications (ICC), 8 June 2015 - 12 June 2015. RIS download Bibtex download
  • Singh R, O'Farrell T & David JPR (2015) Higher Order Colour Shift Keying Modulation Formats for Visible Light Communications. 2015 IEEE 81st Vehicular Technology Conference (VTC Spring), 11 May 2015 - 14 May 2015. RIS download Bibtex download
  • Arbi A & O'Farrell T (2015) Energy efficiency in 5G access networks: Small cell densification and high order sectorisation. 2015 IEEE International Conference on Communication Workshop (ICCW), 8 June 2015 - 12 June 2015. RIS download Bibtex download
  • Jafari AH & O'Farrell T (2015) Performance Evaluation of Spatial Complementary Code Keying Modulation in MIMO Systems. 2015 IEEE 81st Vehicular Technology Conference (VTC Spring), 11 May 2015 - 14 May 2015. RIS download Bibtex download
  • You Y, Ford KL, Rigelsford JM & O'Farrell T (2014) Analysis of the use of beam reconfigurable antennas in a homogeneous cellular network deployment. 2014 Loughborough Antennas and Propagation Conference (LAPC), 10 November 2014 - 11 November 2014. RIS download Bibtex download
  • You Y, Rigelsford JM, Ford KL & O'Farrell T (2014) A dynamic basestation antenna with reconfigurable azimuth beamwidth. 8th European Conference on Antennas and Propagation, EuCAP 2014 (pp 1889-1892) RIS download Bibtex download
  • Singh R, O'Farrell T & David J (2013) Performance evaluation of IEEE 802.15.7 CSK physical layer. Globecom Workshops (GC Wkshps), 2013 IEEE RIS download Bibtex download
  • Guo W, Wang S, O'Farrell T & Fletcher S (2013) Energy consumption of 4G cellular networks: A london case study. IEEE Vehicular Technology Conference RIS download Bibtex download
  • Zhao L, Zhao G & O'Farrell T (2013) Efficiency metrics for wireless communications. IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC (pp 2825-2829) RIS download Bibtex download
  • Guo W, Wang S, Wu Y, Rigelsford J, Chu X & O'Farrell T (2013) Spectral- and energy-efficient antenna tilting in a HetNet using reinforcement learning. Wireless Communications and Networking Conference (WCNC), 2013 IEEE (pp 767-772) View this article in WRRO RIS download Bibtex download
  • Rigelsford J, Guo W & O'Farrell T (2012) A robust wide-area wireless sensor network for GNSS monitoring of flowing glaciers. LAPC 2012 - 2012 Loughborough Antennas and Propagation Conference RIS download Bibtex download
  • Hamdoun H, Loskot P & O'Farrell T (2012) Implementation trade-offs of fountain codes in LTE and LTE-A. 2012 7th International ICST Conference on Communications and Networking in China, CHINACOM 2012 - Proceedings (pp 419-424) RIS download Bibtex download
  • Abukharis S & O'Farrell T (2012) Throughput and delay analysis of a qos differentiated p-persistent CSMA protocol with multirate. IEEE Vehicular Technology Conference RIS download Bibtex download
  • Wang S, Guo W & O'Farrell T (2012) Optimising femtocell placement in an interference limited network: Theory and simulation. IEEE Vehicular Technology Conference RIS download Bibtex download
  • Wang S, Guo W & O'Farrell T (2012) Two-tier cellular networks with frequency selective surface. Proceedings of the 14th IEEE International Conference on High Performance Computing and Communications, HPCC-2012 - 9th IEEE International Conference on Embedded Software and Systems, ICESS-2012 (pp 740-747) RIS download Bibtex download
  • Guo W & O'Farrell T (2012) Dynamic cell expansion: Traffic aware low energy cellular network. IEEE Vehicular Technology Conference RIS download Bibtex download
  • Guo W, Wang S, Turyagyenda C & O'Farrell T (2012) Integrated cross-layer energy savings in a smart and flexible cellular network. 2012 1st IEEE International Conference on Communications in China Workshops, ICCC 2012 (pp 79-84) RIS download Bibtex download
  • Wang S, Guo W & O'Farrell T (2012) Energy efficiency evaluation of SISO and MIMO between LTE-femtocells and 802.11n networks. IEEE Vehicular Technology Conference RIS download Bibtex download
  • Turyagyenda C, O'Farrell T & Guo W (2012) Long term evolution downlink packet scheduling using a novel proportional-fair-energy policy. IEEE Vehicular Technology Conference RIS download Bibtex download
  • Guo W & O'Farrell T (2012) Capacity-energy-cost tradeoff in small cell networks. IEEE Vehicular Technology Conference RIS download Bibtex download
  • Wang S, Turyagyenda C & O'Farrell T (2012) Energy efficiency and spectral efficiency trade-off of a novel interference avoidance approach for LTE-femtocell networks. IEEE Vehicular Technology Conference RIS download Bibtex download
  • Guo W & O'Farrell T (2012) Power-capacity-tradeoff for low energy interference limited cellular networks. IEEE Vehicular Technology Conference RIS download Bibtex download
  • Guo W, Turyagyenda C, Hamdoun H, Wang S, Loskot P & O Farrell T (2011) Towards a low energy LTE cellular network: Architectures. Proceedings of the 19th European Signal Processing Conference (pp 879-883) RIS download Bibtex download
  • Guo W, Turyagyenda C, Hamdoun H, Wang S, Loskot P & O'Farrell T (2011) Towards a low energy LTE cellular network: Architectures. European Signal Processing Conference (pp 879-883) RIS download Bibtex download
  • Abukharis S & O'farrell T (2011) A new adaptive differentiated p-persistent CSMA protocol that reduces the effect of the transmission errors on the system throughput performance. IWCMC 2011 - 7th International Wireless Communications and Mobile Computing Conference (pp 2181-2185) RIS download Bibtex download
  • Guo W & O'Farrell T (2011) Green cellular network: Deployment solutions, sensitivity and tradeoffs. 2011 Wireless Advanced, WiAd 2011 (pp 42-47) RIS download Bibtex download
  • Hamdoun H, Loskot P & O'Farrell T (2011) Scalability of two-way relay channel network coding in a relay enhanced LTE cell. 11th International Symposium on Communications and Information Technologies, ISCIT 2011 (pp 168-173) RIS download Bibtex download
  • Abukharis S, Mackenzie R & O'Farrell T (2011) Throughput and delay analysis for a differentiated p-Persistent CSMA protocol with the capture effect. IEEE Vehicular Technology Conference RIS download Bibtex download
  • Hamdoun H, Loskot P, O'Farrell T & He J (2011) Practical network coding for two way relay channels in LTE networks. IEEE Vehicular Technology Conference RIS download Bibtex download
  • Turyagyenda C, O'Farrell T, He J & Loskot P (2011) SFBC MIMO energy efficiency improvements of common packet schedulers for the long term evolution downlink. IEEE Vehicular Technology Conference RIS download Bibtex download
  • He J, Loskot P, O'Farrell T, Friderikos V, Armour S & Thompson J (2010) Energy efficient architectures and techniques for green radio access networks. 2010 5th International ICST Conference on Communications and Networking in China, ChinaCom 2010 RIS download Bibtex download
  • Badic B, O'Farrell T, Loskot P & He J (2010) Effect of the Base Station Antenna Beam Tilting on Energy Consumption in Cellular Networks. 2010 IEEE 72ND VEHICULAR TECHNOLOGY CONFERENCE FALL RIS download Bibtex download
  • MacKenzie R, Hands D & O'Farrell T (2009) Packet handling strategies to improve video QoS over 802.11e WLANs.. PIMRC (pp 1173-1177) RIS download Bibtex download
  • MacKenzie R, Hands D & O'Farrell T (2009) Effectiveness of H.264 error resilience techniques in 802.11e WLANs.. WCNC (pp 2774-2779) RIS download Bibtex download
  • Badic B, Kabashi AH, Joyce RM & O'Farrell T (2009) A performance investigation of coded MC-CDM with the Chase detection algorithm.. PIMRC (pp 1732-1736) RIS download Bibtex download
  • MacKenzie R, Hands D & O'Farrell T (2009) Video Quality Over 802.11e with a Multi-Rate 802.11g Physical Layer. BMSB: 2009 IEEE INTERNATIONAL SYMPOSIUM ON BROADBAND MULTIMEDIA SYSTEMS AND BROADCASTING, VOLS 1 AND 2 (pp 449-453) RIS download Bibtex download
  • MacKenzie R, Hands D & O'Farrell T (2009) QoS of Video Delivered over 802.11e WLANs. 2009 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-8 (pp 1246-1250) RIS download Bibtex download
  • Badic B, O'Farrell T, Loskot P & He J (2009) Energy Efficient Radio Access Architectures for Green Radio: Large versus Small Cell Size Deployment. 2009 IEEE 70TH VEHICULAR TECHNOLOGY CONFERENCE FALL, VOLS 1-4 (pp 80-84) RIS download Bibtex download
  • MacKenzie R, Hands D & O'Farrell T (2009) An Evaluation of Quality of Service for H.264 over 802.11e WLANs. PV: 2009 17TH INTERNATIONAL PACKET VIDEO WORKSHOP (pp 28-37) RIS download Bibtex download
  • Sholiyi AO, Badic B, Joyce RM & O'Farrell T (2009) A characterisation of HSDPA capacity using EXIT chart techniques. NGMAST 2009 - 3rd International Conference on Next Generation Mobile Applications, Services and Technologies (pp 204-208) RIS download Bibtex download
  • Abukharis S & O'Farrell T (2008) A novel strategy for data rate adaptation in IEEE 802.11g in the case of video streaming. 2008 INTERNATIONAL CONFERENCE ON COMPUTER AND COMMUNICATION ENGINEERING, VOLS 1-3 (pp 812-817) RIS download Bibtex download
  • Wang C, Zhou Z, Unsworth PJ & O'Farrell T (2008) Sensorless speed measurement of induction machines using short time fourier transformation. SPEEDAM 2008 - International Symposium on Power Electronics, Electrical Drives, Automation and Motion (pp 1114-1119) RIS download Bibtex download
  • Aziz UF, O'Farrell T & Waheed UA (2008) Performance Analysis of PDC-OCDMA System with APD Mismatch. WIRELESS NETWORKS, INFORMATION PROCESSING AND SYSTEMS, Vol. 20 (pp 306-313) RIS download Bibtex download
  • Wang C, Zhou Z, Unsworth PJ & O'Farrell T (2008) Sensorless Speed Measurement of Induction Machines Using Short Time Fourier Transformation. 2008 INTERNATIONAL SYMPOSIUM ON POWER ELECTRONICS, ELECTRICAL DRIVES, AUTOMATION AND MOTION, VOLS 1-3 (pp 1108-1113) RIS download Bibtex download
  • MacKenzie R & O'Farrell T (2008) Throughput analysis of a p-persistent CSMA protocol with QoS differentiation for multiple traffic types. 2008 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, PROCEEDINGS, VOLS 1-13 (pp 3220-3224) RIS download Bibtex download
  • Kabashi AH & O'Farrell T (2008) Low Complexity CMC-CDM based Wireless LAN with Different Interleaving Approaches. 2008 IEEE 19TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS (pp 2184-2188) RIS download Bibtex download
  • Baidas MW & O'Farrell T (2007) The performance of coded Non-Coherent M-ary Orthogonal Keying based OFDM systems in a frequency selective and fast time-varying channel. 2007 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-14 (pp 2930-2935) RIS download Bibtex download
  • Serrato JC & O'Farrell T (2006) Joint Demapping and Source Decoding for Multilevel Modulation. 2006 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC 2006), VOLS 1-4 (pp 2140-2144) RIS download Bibtex download
  • Awad AJ & O'Farrell T (2005) Performance evaluation of OFCDM and MC-DS-CDMA for the forward link in next generation mobile communication systems. IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, Vol. 3 (pp 1910-1914) RIS download Bibtex download
  • Abukharis S & O'Farrell T (2004) MPEG-2 video streaming over IEEE 802.11 gwlan in the presence of Bluetooth interference. IEE Conference Publication(503) (pp 579-583) RIS download Bibtex download
  • Trejo-Reyes E, Aziz M & O'Farrell T (2004) Utran radio resource management for MPEG4 video transmission using perceptual video quality methods. IEE Conference Publication(503) (pp 674-677) RIS download Bibtex download
  • Lee CH, Postoyalko V & O'Farrell T (2004) Enhanced performance of ROF link for cellular mobile systems using postdistortion compensation. 2004 IEEE 15TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1-4, PROCEEDINGS (pp 2772-2776) RIS download Bibtex download
  • McVeigh MR, O'Farrell T & Omiyama PE (2003) Normalised-power based reservation in connection admission control for mixed services in 3rd generation radio access networks. PIMRC 2003: 14TH IEEE 2003 INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS PROCEEDINGS, VOLS 1-3 2003 (pp 622-626) RIS download Bibtex download
  • Trejo-Reyes E, McLernon D & O'Farrell T (2003) Stabilization of slotted ALOHA using a modified stochastic gradient algorithm. PIMRC 2003: 14TH IEEE 2003 INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS PROCEEDINGS, VOLS 1-3 2003 (pp 1375-1379) RIS download Bibtex download
  • Wong KK & O'Farrell T (2003) Coverage of 802.11g WLANs in the presence of Bluetooth interference. PIMRC 2003: 14TH IEEE 2003 INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS PROCEEDINGS, VOLS 1-3 2003 (pp 2027-2031) RIS download Bibtex download
  • Omiyi PE & O'Farrell T (2002) Maximising spectral-efficiency in 3rd generation radio-access-networks using low-complexity multiple-access-control protocols. IEE Conference Publication(489) (pp 520-524) RIS download Bibtex download
  • Chin Hee Lee , Postoyalko & O'Farrell (2002) Analysis and simulation of AM-AM/PM nonlinear distortion due to direct laser modulation in radio over fibre systems. International Topical Meeting on Microwave Photonics MWP-02, 8 November 2002 - 8 November 2002. RIS download Bibtex download
  • Aguado LE, Wong KK & O'Farrell T (2002) Coexistence issues for 2.4 GHz OFDM WLANs. THIRD INTERNATIONAL CONFERENCE ON 3G MOBILE COMMUNICATION TECHNOLOGIES(489) (pp 400-404) RIS download Bibtex download
  • Wong KW & O'Farrell T (2002) Blind adaptive single user detection with adjustable step size for DS/CDMA communication over a Rayleigh fading mobile channel. THIRD INTERNATIONAL CONFERENCE ON 3G MOBILE COMMUNICATION TECHNOLOGIES(489) (pp 180-184) RIS download Bibtex download
  • Trejo-Reyes E, O'Farrell T & McLernon D (2002) Stabilisation of the MAC function in the W-CDMA access interface. THIRD INTERNATIONAL CONFERENCE ON 3G MOBILE COMMUNICATION TECHNOLOGIES(489) (pp 225-228) RIS download Bibtex download
  • Donelan H & O'Farrell T (2002) Zero correlation zone sequences for multi-carrier DS-CDMA systems. THIRD INTERNATIONAL CONFERENCE ON 3G MOBILE COMMUNICATION TECHNOLOGIES(489) (pp 141-145) RIS download Bibtex download
  • Donelan H & O'Farrell T (2002) Large families of ternary sequences with aperiodic zero correlation zones for a MC-DS-CDMA system. 13TH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOL 1-5, PROCEEDINGS (pp 2322-2326) RIS download Bibtex download
  • Trejo-Reyes E, O'Farrell T & McLernon D (2002) The Random Early Detection concept applied to the W-CDMA UMTS medium access control. 13TH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOL 1-5, PROCEEDINGS (pp 2044-2048) RIS download Bibtex download
  • Wong KK & O'Farrell T (2000) Performance analysis of M-ary orthogonal DS system for infrared wireless communications. 2000 IEEE SIXTH INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES AND APPLICATIONS, PROCEEDINGS, VOL 1 AND 2 (pp 184-188) RIS download Bibtex download
  • Wong KK & O'Farrell T (2000) Biorthogonal direct-sequence spread spectrum system for infrared wireless communications. PIMRC 2000: 11TH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1 AND 2, PROCEEDINGS (pp 933-938) RIS download Bibtex download
  • Aguado LE, O'Farrell T & Harris JW (2000) Performance evaluation of multiple bit-rate traffic mixing on UTRA. FIRST INTERNATIONAL CONFERENCE ON 3G MOBILE COMMUNICATION TECHNOLOGIES(471) (pp 411-415) RIS download Bibtex download
  • Omiyi PE, Aguado LE, O'Farrell T, Harris JW & Townend R (2000) Performance evaluation of mixing real-time and non-real-time services in UTRA. PIMRC 2000: 11TH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1 AND 2, PROCEEDINGS (pp 1545-1549) RIS download Bibtex download
  • Wong KW & O'Farrell T (2000) Blind adaptive detection for asynchronous CDMA systems. PIMRC 2000: 11TH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1 AND 2, PROCEEDINGS (pp 396-400) RIS download Bibtex download
  • Donelan H & O Farrell T (1999) A new method for generating sets of orthogonal sequences for a synchronous CDMA system. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), Vol. 1746 (pp 56-62) RIS download Bibtex download
  • O'Farrell T & Kiatweerasakul M (1998) Performance of a spread spectrum infrared transmission system under ambient light interference. NINTH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1-3 (pp 703-707) RIS download Bibtex download
  • Patel NR & O'Farrell T (1998) Achieving MAI cancellation in an asynchronous DS/CDMA system by optimum single-user detection. NINTH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1-3 (pp 900-904) RIS download Bibtex download
  • Patel NR & O'Farrell T (1998) MAI cancellation by Optimum Single-user detection for DS/CDMA systems using random binary codes. 1998 IEEE RADIO AND WIRELESS CONFERENCE PROCEEDINGS - RAWCON 98 (pp 177-180) RIS download Bibtex download
  • O'Farrell T & Kiatweerasakul M (1998) Broadband wireless access using optical spread spectrum techniques. BROADBAND ACCESS AND NETWORK MANAGEMENT - NOC '98 (pp 230-237) RIS download Bibtex download
  • Omiyi PE & O'Farrell T (1998) Throughput and delay analysis of a novel slotted CDMA MAC protocol for multimedia communication in wireless LANs. NINTH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1-3 (pp 570-574) RIS download Bibtex download
  • O'Farrell T & Kiatweerasakul M (1998) Wireless infrared transmission using direct sequence spread spectrum techniques. 1998 IEEE 5TH INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES AND APPLICATIONS - PROCEEDINGS, VOLS 1-3 (pp 752-756) RIS download Bibtex download
  • Patel NR & O'Farrell T (1998) Optimum single-user detection for DS/CDMA systems achieving complete MAI cancellation. 1998 IEEE 5TH INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES AND APPLICATIONS - PROCEEDINGS, VOLS 1-3 (pp 941-945) RIS download Bibtex download
  • Omiyi PE & O'Farrell T (1998) A new throughput analysis of a novel MAC protocol for CDMA-Based wireless LANs. 1998 IEEE RADIO AND WIRELESS CONFERENCE PROCEEDINGS - RAWCON 98 (pp 23-26) RIS download Bibtex download
  • Omiyi PE & O'Farrell T (1998) Throughput and delay analysis of a (quasi-) synchronous CDMA MAC protocol for broadband, wireless packet networks. 1998 IEEE 5TH INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES AND APPLICATIONS - PROCEEDINGS, VOLS 1-3 (pp 277-281) RIS download Bibtex download
  • O'Farrell T (1997) Optimum single-user detection in a radio based CDMA system. IEE Colloquium (Digest)(129) RIS download Bibtex download
  • O'Farrell T (1996) Optimum single-user detector for asynchronous DS-CDMA radio based systems. IEEE International Symposium on Spread Spectrum Techniques & Applications, Vol. 3 (pp 1029-1033) RIS download Bibtex download
  • O'Farrell T & Lochmann SI (1994) Optical correlator receivers for SIK DS-CDMA communication systems. IEEE International Symposium on Spread Spectrum Techniques & Applications, Vol. 2 (pp 584-587) RIS download Bibtex download
  • O'Farrell T & Beale M (1989) Code-division multiple-access (CDMA) techniques in optical fibre LANs. IEE Conference Publication(300) (pp 111-115) RIS download Bibtex download
  • O'Farrell T & Cunningham MJ (1987) NOISE PROCESSES IN A DATA ACQUISITION SYSTEM FOR PYROELECTRIC LINEAR ARRAYS USED IN LOW RESOLUTION THERMAL IMAGERS.. IEE Colloquium (Digest)(1987 /17) RIS download Bibtex download
  • O'Farrell T & Cunningham MJ (1986) SIGNAL MULTIPLEXING SYSTEM FOR PYROELECTRIC LINEAR ARRAYS.. IEE Conference Publication(263) (pp 24-29) RIS download Bibtex download
  • Wong KK & O'Farrell T () Infrared wireless communications. 11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525) RIS download Bibtex download
  • Md Nasimus S & O'Farrell T () The performance of an optimum digital matched filter detector using structured code sequences for CDMA applications. [Proceedings] Singapore ICCS/ISITA `92 RIS download Bibtex download
  • O'Farrell T () Throughput Analysis of a Slotted Cdma Scheme with One Persistent Carrier Sensing and Collision (overload) Detection. IEEE Second International Symposium on Spread Spectrum Techniques and Applications RIS download Bibtex download
  • Pham Manh Lam & O'Farrell T () Delay/throughput performance of CDMA embedded in a one-persistent channel sense and collision (overload) detection protocol. [Proceedings] Singapore ICCS/ISITA `92 RIS download Bibtex download

Datasets

Professional activities
  • Director of CommNet
  • External Examiner at KCL
Research students
Student Degree Status Primary/Secondary
Abukharis S H S PhD Graduated Primary
Arbi A S PhD Graduated Primary
Singh R PhD Graduated Primary
Turyagyenda C  PhD Graduated Primary
Wang S PhD Graduated Primary