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Career Summary

Biography

Sarah Johnson received the B.E. and Ph.D. degrees in Electrical Engineering from the University of Newcastle in 1999 and 2004 respectively. She then held a postdoctoral position with the Wireless Signal Processing Program, National ICT Australia before returning to the University of Newcastle where she is now an Australian Research Council Future Fellow. Her research concentrates on the fields of coding and information theory. 


A/Prof Johnson has served on the Technical Program committee for the Australian Communications Theory Workshop (2005,2006,2007), IEEE VTC (Spring 2006), IEEE Globecom (2009), IEEE PIMRC (2012), IEEE ISTC (2012,2014), and IEEE ITW (2014) and on the organising committee for the IEEE International Conference on Telecommunications ICT (2015). 


A/Prof Johnson has authored a book, Iterative Error Correction Codes, published by Cambridge University Press and published over 50 technical papers. Her research has been supported by five Australian Research Council (ARC) DP grants, an ARC Future Fellowship, an ARC Linkage Project and industry-sponsored projects.

Qualifications

  • PhD (Electrical Engineering), University of Newcastle
  • Bachelor of Engineering (Electrical), University of Newcastle

Research

Research keywords

  • Error Correction Coding
  • Iterative error correction
  • Low-density parity-check codes
  • Network information theory
  • Repeat-accumulate codes
  • Telecommunications

Research expertise

I perform research in the fields of digital communications and information theory. The field of

digital communications is concerned with the reliable transmission and storage of digital data while

information theory investigates the fundamental theoretical limits of this task. This includes:

The design, analysis and application of iterative error correction codes. These codes enable the

communication of a digital message without error (or with as few errors as possible) despite an

imperfect communications medium. Such codes are used in a large range of applications including

mobile phones, digital television, wireless local area networks, deep space communications, longhaul

optical communications and hard disk storage.

The design of communication strategies for next generation digital networks, focusing in particular

on cooperation in multi-terminal relay networks.

Languages

  • English

Fields of Research

CodeDescriptionPercentage
080401Coding And Information Theory70
100510Wireless Communications20
090609Signal Processing10

Memberships

Body relevant to professional practice.

  • Member - Institute of Electrical and Electronic Engineers (IEEE)

Committee/Associations (relevant to research).

  • Member - International Technical Program Committee IEEE VTC
  • Member - International Technical Program Committee IEEE PIMRC
  • Member - International Technical Program Committee IEEE International Symposium on Turbo Codes
  • Member - International Technical Program Committee IEEE International Symposium on Turbo Codes
  • Member - International Technical Program Committee IEEE Information Theory Workshop (ITW)
  • Member - Organising Committee IEEE International Conference on Communications

Appointments

Future Fellow
Australian Research Council (Australia)
01/03/2012
Australian Postdoc Fellowship (APD)
Australian Research Council (Australia)
01/06/2004 - 01/06/2007
Senior Research Fellow
University of Newcastle (Australia)
01/06/2007 - 01/03/2012

Awards

Research Award.

2007Pro Vice-Chancellor’s Award for Research Excellence
University of Newcastle (Australia)
Pro Vice-Chancellor’s Award for Research Excellence

Administrative

Administrative expertise

Technical program committee member for national and international conferences.

Teaching

Teaching keywords

  • Computer Engineering
  • Telecommunications Engineering

Teaching expertise

Undergraduate teaching in computer and telecommunications engineering including Introduction to Computer Engineering, Introduction to Telecommunications and Advanced Telecommunications

Supervision of honors students and postgraduate students.

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Highlighted Publications

For publications that are currently unpublished or in-press, details are shown in italics.

YearCitationAltmetricsLink
2003Johnson SJ, Weller SR, 'Resolvable 2-Designs for Regular Low-Density Parity-Check Codes', IEEE Transactions on Communications, 51 1413-1419 (2003) [C1]
2004Johnson SJ, Weller SR, 'Codes for iterative decoding from partial geometies', IEEE Transactions on Communications, 52 236-243 (2004) [C1]
2008Johnson SJ, Weller SR, 'Combinatorial interleavers for systematic regular repeat-accumulate codes', IEEE Transactions on Communications, 56 1201-1206 (2008) [C1]
2009Johnson SJ, 'Burst erasure correcting LDPC codes', IEEE Transactions on Communications, 57 641-652 (2009) [C1]
2010Johnson SJ, Iterative Error Correction: Turbo, Low-Density Parity-Check and Repeat-Accumulate Codes, Cambridge University Press, Cambridge, UK, 356 (2010) [A2]
2011Ong LL, Johnson SJ, Kellett CM, 'The capacity region of multiway relay channels over finite fields with full data exchange', IEEE Transactions on Information Theory, 57 3016-3031 (2011) [C1]
2013Johnson S, Lechner G, 'Spatially Coupled Repeat-Accumulate Codes', IEEE COMMUNICATIONS LETTERS, 17 373-376 (2013) [C1]
2012Ong LL, Kellett CM, Johnson SJ, 'On the equal-rate capacity of the AWGN multiway relay channel', IEEE Transactions on Information Theory, 58 5761-5769 (2012) [C1]

Publications

For publications that are currently unpublished or in-press, details are shown in italics.

Click on a category title below to expand the list of citations for that specific category.

Book (1 outputs)

YearCitationAltmetricsLink
2010Johnson SJ, Iterative Error Correction: Turbo, Low-Density Parity-Check and Repeat-Accumulate Codes, Cambridge University Press, Cambridge, UK, 356 (2010) [A2]

Chapter (1 outputs)

YearCitationAltmetricsLink
2003Johnson SJ, Weller SR, 'Low-density parity-check codes: Design and decoding', Wiley Encyclopedia of Telecommunications, Wiley Interscience, Brisbane 1-18 (2003) [B1]

Co-authors: Steven Weller

Journal article (23 outputs)

YearCitationAltmetricsLink
2014Kongsui R, Beynon SB, Johnson SJ, Mayhew J, Kuter P, Nilsson M, Walker FR, 'Chronic stress induces prolonged suppression of the P2X7 receptor within multiple regions of the hippocampus: A cumulative threshold spectra analysis', Brain, Behavior, and Immunity, 42 69-80 (2014) [C1]
2014Ong L, Johnson SJ, Kellett CM, 'On the capacity of the binary-symmetric parallel-relay network', TRANSACTIONS ON EMERGING TELECOMMUNICATIONS TECHNOLOGIES, 25 217-230 (2014)
2014Asadi B, Ong L, Johnson SJ, 'On Index Coding in Noisy Broadcast Channels with Receiver Message Side Information', IEEE COMMUNICATIONS LETTERS, 18 640-643 (2014)
2013Ong L, Lechner G, Johnson SJ, Kellett CM, 'The Three-User Finite-Field Multi-Way Relay Channel with Correlated Sources', IEEE TRANSACTIONS ON COMMUNICATIONS, 61 3125-3135 (2013) [C1]
2013Timo R, Lechner G, Ong L, Johnson S, 'Multi-Way Relay Networks: Orthogonal Uplink, Source-Channel Separation and Code Design', IEEE TRANSACTIONS ON COMMUNICATIONS, 61 753-768 (2013) [C1]
2013Johnson S, Lechner G, 'Spatially Coupled Repeat-Accumulate Codes', IEEE COMMUNICATIONS LETTERS, 17 373-376 (2013) [C1]
2013Tynan RJ, Beynon SB, Hinwood M, Johnson SJ, Nilsson M, Woods JJ, Walker FR, 'Chronic stress-induced disruption of the astrocyte network is driven by structural atrophy and not loss of astrocytes', Acta Neuropathologica, 126 75-91 (2013) [C1]
2012Ong LL, Motani M, Johnson SJ, 'On capacity and optimal scheduling for the half-duplex multiple-relay channel', IEEE Transactions on Information Theory, 58 5770-5784 (2012) [C1]

Co-authors: Lawrence L Ong

2012Ong LL, Kellett CM, Johnson SJ, 'On the equal-rate capacity of the AWGN multiway relay channel', IEEE Transactions on Information Theory, 58 5761-5769 (2012) [C1]
2012Ong LL, Johnson SJ, Kellett CM, 'The half-duplex AWGN single-relay channel: Full decoding or partial decoding?', IEEE Transactions on Communications, 60 3156-3160 (2012) [C1]
2012Ong LL, Johnson SJ, 'The capacity region of the restricted two-way relay channel with any deterministic uplink', IEEE Communications Letters, 16 396-399 (2012) [C1]
2011Johnson SJ, Ong LL, Kellett CM, 'Joint channel-network coding strategies for networks with low-complexity relays', European Transactions on Telecommunications, 22 396-406 (2011) [C1]
2011Ong LL, Johnson SJ, Kellett CM, 'The capacity region of multiway relay channels over finite fields with full data exchange', IEEE Transactions on Information Theory, 57 3016-3031 (2011) [C1]
2010Ong LL, Johnson SJ, Kellett CM, 'An optimal coding strategy for the binary multi-way relay channel', IEEE Communications Letters, 14 330-332 (2010) [C1]
2009Johnson SJ, Weller SR, 'Practical interleavers for repeat-accumulate codes', IEEE Transactions on Communications, 57 1225-1228 (2009) [C1]
2009Johnson SJ, 'A finite-length algorithm for LDPC codes without repeated edges on the binary erasure channel', IEEE Transactions on Information Theory, 55 27-32 (2009) [C1]
2009Johnson SJ, 'Burst erasure correcting LDPC codes', IEEE Transactions on Communications, 57 641-652 (2009) [C1]
2008Johnson SJ, Weller SR, 'Combinatorial interleavers for systematic regular repeat-accumulate codes', IEEE Transactions on Communications, 56 1201-1206 (2008) [C1]
2006Johnson SJ, Weller SR, 'Constraining LDPC degree distributions for improved error floor performance', IEEE Communications Letters, 10 103-105 (2006) [C1]
2004Johnson SJ, Weller SR, 'Codes for iterative decoding from partial geometies', IEEE Transactions on Communications, 52 236-243 (2004) [C1]
2003Johnson SJ, Weller SR, 'Resolvable 2-Designs for Regular Low-Density Parity-Check Codes', IEEE Transactions on Communications, 51 1413-1419 (2003) [C1]
2003Johnson SJ, Weller SR, 'A Family if Irregular LDPC Codes with low Encoding Complexity', IEEE Communication Letters, 7 79-81 (2003) [C1]
2003Weller SR, Johnson SJ, 'Regular low-density parity-check codes from oval designs', European Transactions on Teleconmmunications, 14 399-409 (2003) [C1]
Show 20 more

Conference (27 outputs)

YearCitationAltmetricsLink
2012Ong LL, Johnson SJ, 'The capacity region of restricted multi-way relay channels with deterministic uplinks', 2012 IEEE International Symposium on Information Theory Proceedings (ISIT), Boston, Massachusetts (2012) [E1]

Co-authors: Lawrence L Ong

2012Ong LL, Timo R, Johnson SJ, 'The finite field multi-way relay channel with correlated sources: Beyond three users', 2012 IEEE International Symposium on Information Theory Proceedings (ISIT), Cambridge, Massachusetts (2012) [E1]

Co-authors: Lawrence L Ong

2012Lechner G, Johnson SJ, 'Absorbing sets and cycles', 2012 7th International Symposium on Turbo Codes and Iterative Information Processing, ISTC 2012, Gothenburg, Sweden (2012) [E1]
2011Ong LL, Timo R, Lechner G, Johnson SJ, Kellett CM, 'The finite field multi-way relay channel with correlated sources: The three-user case', 2011 IEEE International Symposium on Information Theory Proceedings (ISIT), St. Petersburg, Russia (2011) [E1]
2011Ong LL, Kellett CM, Johnson SJ, 'On achievable rate regions of the asymmetric AWGN two-way relay channel', 2011 IEEE International Symposium on Information Theory Proceedings (ISIT), St. Petersburg, Russia (2011) [E1]
2010Ong LL, Johnson SJ, Kellett CM, 'The binary-symmetric parallel-relay network', Proceedings of the 2010 IEEE International Symposium on Information Theory (ISIT 2010), Austin, TX (2010) [E1]
2010Hayes DF, Johnson SJ, Weller SR, 'Irregular Repeat-Accumulate-Like Codes with Improved Error Floor Performance', 2010 IEEE INFORMATION THEORY WORKSHOP (ITW), Dublin, IRELAND (2010) [E1]
2010Ong LL, Kellett CM, Johnson SJ, 'Capacity theorems for the AWGN multi-way relay channel', Proceedings of the 2010 IEEE International Symposium on Information Theory (ISIT 2010), Austin, TX (2010) [E1]
2010Ong LL, Johnson SJ, Kellett CM, 'The capacity of a class of multi-way relay channels', Proceedings of the 12th IEEE International Conference on Communications Systems (ICCS 2010), Singapore (2010) [E1]
2010Ong LL, Johnson SJ, Kellett CM, 'Functional-decode-forward for the general discrete memoryless two-way relay channel', Proceedings of the 12th IEEE International Conference on Communications Systems (ICCS 2010), Singapore (2010) [E1]
2009Ong LL, Johnson SJ, Kellett CM, 'Achievable rate regions of the butterfly network with noisy links and end-to-end error correction', 2009 IEEE Information Theory Workshop (ITW 2009), Taormina, Sicily (2009) [E1]
2009Ong LL, Johnson SJ, Motani M, 'Optimal schedules for the D-node half duplex phase fading MRC', 2009 IEEE International Symposium on Information Theory (ISIT 2009), Seoul, Korea (2009) [E1]
2007Johnson SJ, Kellett CM, 'Joint Network and Channel Coding for Cooperative Networks', 2007 AUSTRALASIANTELECOMMUNICATION NETWORKS AND APPLICATIONS CONFERENCE, Christchurch, NEW ZEALAND (2007)
2006Johnson SJ, Weller SR, 'Practical Interleavers for Systematic Repeat-Accumulate Codes', 2006 IEEE 63rd Vehicular Technology Conference, Melbourne, VIC, Australia (2006) [E1]

Co-authors: Steven Weller

2006Johnson SJ, 'Erasure Correcting LDPC Codes For Channels With Packet Losses', Proceedings of the NEWCOM-ACORN Joint Workshop, Vienna, September 2006, Vienna, Austria (2006) [E1]
2006Hanlen LW, Johnson SJ, Teal PD, 'Proceedings 7th Australian Communications Theory Workshop 2006', Proceedings 7th Australian Communications Theory Workshop 2006, Perth, Australia (2006) [E4]
2005Johnson SJ, 'Finite-Length Repeat-Accumulate Codes on The Binary Erasure Channel', 2005 Asia-Pacific Conference on Communications, Perth, Western Australia, 3-5 October 2005, Perth, Australia (2005) [E1]
2005Johnson SJ, Weller SR, 'Interleaver and Accumulator Design For Systematic Repeat-Accumulate Codes', Proceedings 6th Australian Communications Theory Workshop 2005 : 2-4 February 2005, The University of Queensland, Brisbane, Australia, Brisbane, Australia (2005) [E1]

Co-authors: Steven Weller

2005Johnson SJ, Weller SR, 'Constructions for Irregular Repeat-Accumulate Codes', Proceedings of 2005 IEEE International Symposium on Information Theory, Adelaide, S. Aust (2005) [E1]

Co-authors: Steven Weller

2004Johnson SJ, Weller SR, 'Structured low-density parity-check codes over non-binary fields', Proceedings of the 5th Australian Communication Theory Workshop 2004, Brisbane (2004) [E1]

Co-authors: Steven Weller

2003Johnson SJ, Weller SR, 'Can Cyclic Codes be Useful Low-Density Parity-Check Codes', Proceedings for AUSCTW 2003, Melbourne (2003) [E1]

Co-authors: Steven Weller

2003Brown RA, Johnson SJ, Weller SR, 'Performance of Space-Time Block Codes with Finite Geometry LDPC Outer Codes', Proceedings for AUSCTW 2003, University of Melbourne (2003) [E1]

Co-authors: Steven Weller

2003Johnson SJ, Weller SR, 'High-Rate LDPC Codes from Unital Designs', Proceedings for GLOBECOM 2003, San Francisco, USA (2003) [E1]

Co-authors: Steven Weller

2002Johnson SJ, Weller SR, 'Codes for Iterative Decoding from Partial Geometries', International Symposium on Information Theory 2002, Switzerland (2002) [E1]

Co-authors: Steven Weller

2002Johnson SJ, Weller SR, 'Quasi-cyclic LDPC Codes from Difference Families', Proceedings 3rd Australian Communications Theory Workshop 2002, Canberra, Australia (2002) [E1]

Co-authors: Steven Weller

2001Johnson SJ, Weller SR, 'Construction of Low-density Parity-check Codes from Kirkman Triple Systems', IEEE Global Telecommunications Conference, San Antonio, Texas, USA (2001) [E1]

Co-authors: Steven Weller

2001Johnson SJ, Weller SR, 'Regular low-density parity-check codes from combinatorial designs', Proceedings 2001 IEEE Information Theory Workshop, Cairns, Australia (2001)

Co-authors: Steven Weller

Show 24 more
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Grants and Funding

Summary

Number of grants19
Total funding$3,306,282

- Indicates that the researcher may be seeking students for this project.

Click on a grant title below to expand the full details for that specific grant.

2015 (1 grants)

New strategies to transmit data: Coping with exponential growth in demand$355,100
Funding Body: ARC (Australian Research Council)

Project Team
Associate Professor Sarah Johnson, Doctor Lawrence Ong, Lechner, Gottfried
SchemeRole
Discovery ProjectsChief Investigator
Total AmountFunding StartFunding Finish
$355,10020152017
GNo:G1400187

2014 (2 grants)

New error correction strategies for continuous variable quantum key distribution$42,000
Funding Body: Quintessence Labs Pty. Ltd.

Project Team
Associate Professor Sarah Johnson, Dr Thomas Symul, Dr Andrew Lance
SchemeRole
Linkage Projects Partner FundingChief Investigator
Total AmountFunding StartFunding Finish
$42,00020142016
GNo:G1201271

Improving error correction performance through spatial coupling $20,000
Funding Body: University of Newcastle

Project Team
Associate Professor Sarah Johnson
SchemeRole
Near Miss GrantChief Investigator
Total AmountFunding StartFunding Finish
$20,00020142014
GNo:G1301383

2013 (4 grants)

New error correction strategies for continuous variable quantum key distribution$300,000
Funding Body: ARC (Australian Research Council)

Project Team
Associate Professor Sarah Johnson, Dr Thomas Symul, Dr Andrew Lance
SchemeRole
Linkage ProjectsChief Investigator
Total AmountFunding StartFunding Finish
$300,00020132016
GNo:G1201139

Improving error correction performance through spatial coupling$50,000
Funding Body: University of Newcastle

Project Team
Associate Professor Sarah Johnson
SchemeRole
Near Miss GrantChief Investigator
Total AmountFunding StartFunding Finish
$50,00020132013
GNo:G1300453

Integrated virtual reality jet ball system$20,000
Funding Body: University of Newcastle - Faculty of Engineering & Built Environment

SchemeRole
Equipment GrantChief Investigator
Total AmountFunding StartFunding Finish
$20,00020132013
GNo:184266236

Image processing of neural cell morphology$12,000
Funding Body: Faculty of Engineering

SchemeRole
Strategic Pilot GrantChief Investigator
Total AmountFunding StartFunding Finish
$12,00020132013
GNo:184237220

2012 (3 grants)

Compression of Digital Data: Bridging The Gap Between Theory and Practice$320,000
Funding Body: ARC (Australian Research Council)

SchemeRole
Discovery ProjectInvestigator
Total AmountFunding StartFunding Finish
$320,00020122014
GNo:183634664

Error correction for quantum key distribution$100,000
Funding Body: Enterprise Connect

SchemeRole
Researchers in BusinessChief Investigator
Total AmountFunding StartFunding Finish
$100,00020122012
GNo:184237232

2011 Emerging Research Leaders Program$15,000
Funding Body: University of Newcastle

Project Team
Associate Professor Sarah Johnson
SchemeRole
Emerging Research Leaders ProgramChief Investigator
Total AmountFunding StartFunding Finish
$15,00020122012
GNo:G1201064

2011 (1 grants)

New high-performance iterative error correction codes$623,276
Funding Body: ARC (Australian Research Council)

Project Team
Associate Professor Sarah Johnson
SchemeRole
Future FellowshipsChief Investigator
Total AmountFunding StartFunding Finish
$623,27620112016
GNo:G1100437

2010 (1 grants)

Optimising Cooperation in Multiterminal Wireless Networks$150,000
Funding Body: ARC (Australian Research Council)

Project Team
Associate Professor Sarah Johnson
SchemeRole
Discovery ProjectsChief Investigator
Total AmountFunding StartFunding Finish
$150,00020102012
GNo:G0189995

2008 (1 grants)

Iterative coding for next generation networks$335,000
Funding Body: ARC (Australian Research Council)

Project Team
Associate Professor Sarah Johnson, Associate Professor Christopher Kellett
SchemeRole
Discovery ProjectsChief Investigator
Total AmountFunding StartFunding Finish
$335,00020082010
GNo:G0187513

2007 (2 grants)

2007 Research Fellowship$514,312
Funding Body: University of Newcastle

Project Team
Associate Professor Sarah Johnson
SchemeRole
Research FellowshipChief Investigator
Total AmountFunding StartFunding Finish
$514,31220072012
GNo:G0187099

2007 Research Fellowship Project Grant$15,000
Funding Body: University of Newcastle

Project Team
Associate Professor Sarah Johnson
SchemeRole
Fellowship GrantChief Investigator
Total AmountFunding StartFunding Finish
$15,00020072007
GNo:G0188110

2006 (1 grants)

Construction methods and analysis tools for repeat-accumulate error correction codes$112,128
Funding Body: ARC (Australian Research Council)

Project Team
Associate Professor Sarah Johnson
SchemeRole
Discovery ProjectsChief Investigator
Total AmountFunding StartFunding Finish
$112,12820062008
GNo:G0185285

2005 (1 grants)

Australian Communications Research Network (ACoRN)$50,000
Funding Body: ARC (Australian Research Council)

Project Team
Associate Professor Steven Weller, Professor Brett Ninness, Associate Professor Sarah Johnson
SchemeRole
Research NetworksInvestigator
Total AmountFunding StartFunding Finish
$50,00020052009
GNo:G0186088

2004 (2 grants)

Structured low-density parity-check codes for next-generation digital communications$257,466
Funding Body: ARC (Australian Research Council)

Project Team
Associate Professor Steven Weller, Associate Professor Sarah Johnson
SchemeRole
Discovery ProjectsInvestigator
Total AmountFunding StartFunding Finish
$257,46620042006
GNo:G0183017

Design and evaluation of repeat-accumulate error correction codes for digital communications$15,000
Funding Body: University of Newcastle

Project Team
Associate Professor Sarah Johnson
SchemeRole
Early Career Researcher GrantChief Investigator
Total AmountFunding StartFunding Finish
$15,00020042004
GNo:G0184996
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Research Supervision

Number of current supervisions5
Total current UoN Masters EFTSL0.5
Total current UoN PhD EFTSL1.4

For supervisions undertaken at an institution other that the University of Newcastle, the institution name is listed below the program name.

Current Supervision

CommencedProposed
Completion
ProgramSupervisor TypeResearch Title
20142016M Philosophy(Elec Engineering)Principal SupervisorThe Design and Construction of an Intrinsic Optical Signal Brain Imaging System Combined with a Virtual Reality Setup to Investigate the Effects of Stroke in Mice
20142018PhD (Electrical Engineering)Co-SupervisorCapacity Analyses of Multi-source, Multi-destination, Multi-hop Cooperative Relay Networks
20132017PhD (Electrical Engineering)Principal SupervisorAnalysis and Design of Multi-Edge Type Low-Density Parity-Check Codes for Multi-Point Communications
20132017PhD (Electrical Engineering)Co-SupervisorBroadcast Channels with Receiver Message Side Information
20112015PhD (Human Physiology)Co-SupervisorInvestigating the Role of Microglia in Regulating Complex Behaviour

Past Supervision

YearProgramSupervisor TypeResearch Title
2006PHD Electrical Engineering
Australian National University
Co-SupervisorThe Graphical Structure of Iterative Low-Density Parity-Check Decoding
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Associate Professor Sarah Johnson

Work Phone(02) 4921 6028
Fax(02) 4921 6993
Email
PositionARC Future Fellow
School of Elect Engineering and Computer Science
Faculty of Engineering and Built Environment
The University of Newcastle, Australia
Focus AreaElectrical and Computer Engineering
Office
EA G14,
Engineering A,
Callaghan
University Drive
Callaghan NSW 2308
Australia
URL:www.newcastle.edu.au/profile/sarah-johnson