**Books**

**Khmaies Ouahada**Coded Modulation for Power-Line Communication Channel. Lambert Academic Publishing. Published in April 2012. ISBN: 978-3-8484-1674-5.**Khmaies Ouahada**, Viterbi Decoding of Ternary Line Codes. VDM Verlag Dr. Mueller e. K., Germany. Published in 2008. ISBN: 978-3-8364-3819-3.

**Chapter in a Book**

K. Ouahada and H. C. Ferreira, A Graph Theoretic Approach for Certain Properties of Spectral Null Codes, New Frontiers in Graph Theory, Yagang Zhang, Editor, INTECH publisher. Published in March 2012. ISBN: 979-953-307-303-2.

**Journals**

**K. Ouahada**and H. C. Ferreira, “Generation of Spectral Null Codes with Permutation Sequences,” AEU – International Journal on Communications, Vol. 67 (1), pp. 1-9, Jan. 2013.**K. Ouahada**, L. Cheng and H. C. Ferreira, “A Comparative Study on the Distance-Optimality for Distance-Preserving Mappings Constructions with Cyclic-Shift Technique,” SAIEE Africa Research Journal, Vol. 103(4) Dec. 2012, pp. 156 – 165.**K. Ouahada**, “A Simulation Study of the Performance of the Viterbi Decoding Algorithm for Certain M-level Line Codes. SAIEE Africa Research Journal, Vol. 103 (3), pp. 134-145, Sept. 2012.**K. Ouahada**and H. C. Ferreira, “A Simulation and Graph Theoretical Analysis of Certain Properties of Spectral Null Codebooks,” SAIEE Africa Research Journal, Vol. 103 (3), Sept. 2012, pp. 106-115.**K. Ouahada**, T. G. Swart and H. C. Ferreira, “Permutation sequences and coded PAM signals with spectral nulls at rational submultiples of the symbol frequency,” Cryptography and Communications Journal, vol. 3, no. 2, pp. 87-108, June 2011.**K. Ouahada**and H. C. Ferreira, “On the Generating Function and its Application to Ternary Line Codes,” SAIEE Africa Research Journal, vol. 101, no. 4, pp. 121-131, December 2010.- L. Cheng, H. C. Ferreira and
**K. Ouahada**, “Moment Balancing Templates for Spectral Null Codes,” IEEE Transactions on Information Theory, vol. 56, no. 8, pp. 3749-3753, August 2010. - H. C. Ferreira, K. A. S. Abdel-Ghaffar, L. Cheng, T. G. Swart and
**K. Ouahada**, “Moment balancing templates: Constructions to add insertion/deletion correction capability to error correcting or constrained codes,” IEEE Transactions on Information Theory, vol. 55, no. 8, pp. 3494-3500, August 2009. - T. G. Swart, H. C. Ferreira and
**K. Ouahada**, “Using graphs for the analysis and construction of permutation distance-preserving mappings,” IEEE Transactions on Information Theory, vol. 54, no. 2, pp. 910-916, February 2008. **K. Ouahada**, H. C. Ferreira, A. J. H. Vinck, A. J. Snyders and T. G. Swart, “Combined spectral shaping codes and OFDM modulation for narrowband interference channels,” SAIEE Africa Research Journal, vol. 99, no. 1, pp. 11-17, March 2008.**K. Ouahada**, T. G. Swart, H. C. Ferreira and L. Cheng, “Binary permutation sequences as subsets of Levenshtein codes, run-length limited codes and spectral shaping codes,” Designs, Codes and Cryptography Journal, vol. 48, no. 2, pp. 141-154, August 2008.**K. Ouahada**and H. C. Ferreira, “Simulation study of the performance of ternary line codes under Viterbi decoding,” IEE Proceedings I Communications Speech and Vision, vol. 151, no. 5, pp. 409-414, October 2004.**K. Ouahada**and H. C. Ferreira, “Soft-decision decoding of some ternary line codes,” IEE Electronics Letters, vol. 39, no. 14, pp. 1068-1069, July 2003.

**Conferences**

- Omowunmi Longe,
**K. Ouahada**, Hendrick Ferreira and Suvendi Chinnappen, “Renewable Energy Sources Microgrid Design for Rural Area in South Africa”, 2014 IEEE PES Innovative Smart Grid Technologies Conference, Washington, USA, 19 – 22 February 2014. - Mahlaku Mareli, Suvendi Rimer, Babu Sena Paul and
**K. Ouahada**, “Experimental evaluation of NFC reliability between an RFID tag and a smartphone”, IEEE AFRICON 2013. - Ramakgabane Rangata,
**K. Ouahada**and Suvendi Rimer, “Analog Signal Acquisition and Transmission within extremely low and very low frequency bands (ELF and VLF)”, IEEE AFRICON 2013. - Mahlaku Mareli, Suvendi Rimer, Babu Sena Paul and
**K. Ouahada**“Medicines Identification for African Illiterate Patients using Near Field Communication”, Fifth International IEEE EAI Conference on Infrastructure and Services for Developing Countries, November 25–27, 2013, Blantyre, Malawi - C Nomatungulula, G Ngandu, S Rimer, B Paul and
**K. Ouahada**, “Mobile Sink Wireless Underground Sensor Communication Monitor”, Fifth International IEEE EAI Conference on Infrastructure and Services for Developing Countries, November 25–27, 2013, Blantyre, Malawi - Katleho Kanyane, Suvendi Rimer, Babu Sena Paul and
**K. Ouahada**, “Simulation of wireless sensor node transmission over a multiple access channel”, Fifth International IEEE EAI Conference on Infrastructure and Services for Developing Countries, November 25–27, 2013, Blantyre, Malawi - Omowunmi Longe,
**K. Ouahada**, Hendrick Ferreira and Suvendi Chinnappen, “A Survey on Wireless Sensor Networks and Advanced Metering Infrastructure Deployment in Smart Grid”, Fifth International IEEE EAI Conference on Infrastructure and Services for Developing Countries, November 25–27, 2013, Blantyre, Malawi - Kabeya Gilbert Ngandu, Cedrick Siasia Nomatungulula, Suvendi Rimer, Babu Sena Paul and
**K. Ouahada**, “Wireless Sensor Node Mobility and its Effect on Transmission Reliability”, Fifth International IEEE EAI Conference on Infrastructure and Services for Developing Countries, November 25–27, 2013, Blantyre, Malawi - T. Lukusa,
**K. Ouahada**, R. Ndjiongue, H. C. Ferreira and A. J. H. Vinck, “Hardware Implementation of Frequency Mappings for Power Line Communications,” Presented at IEEE ISPLC 2013, Recent Results, March 24-27, 2013. Johannesburg, South Africa. - Glibert Ngandu, Cedric Nomatungulula, Suvendi Rimer, Babu Sena Paul,
**K. Ouahada**, Bheki Twala, “Evaluating effect of foliage on link reliability of wireless signal,” Presented at IEEE ICIT 2013, February, Cape Town, South Africa. - Hassan,
**K. Ouahada**, T. Marwala and Bekhi Twala, “Optimization of the Compressed Air-Usage in South African Mines,” in Proceedings of IEEE-Africon11, Livingstone, Zambia, September 13-15, 2011, In the proceedings. - T. Lukusa,
**K. Ouahada**and H. C. Ferreira, “Advantage of Distance-Preserving Mappings and M-FSK Modulation for Power-Line Communications Channel,” in Proceedings of IEEE-Africon11, Livingstone, Zambia, September 13-15, 2011, In the proceedings. **K. Ouahada**and H. C. Ferreira, “Spectral Shaping Codes with Even Length Permutation Sequences,” in Proceedings of the IEEE Information Theory Workshop, Paraty, Brazil, October 16-20, 2011, pp. 535-539.- K. Ouahada and H. C. Ferreira, “Simulation Study and Analysis of Certain Properties of Spectral Null Codes,” in Proceedings of IEEE-Africon11, Livingstone, Zambia, September 13-15, 2011, In the proceedings.
**K. Ouahada**, “Error Propagation Viterbi Decoding Algorithm for Certain Modal and Non-Modal Ternary Line Codes,” in Proceedings of IEEE-Africon11, Livingstone, Zambia, September 13-15, 2011, In the proceedings.**K. Ouahada**, “Improvement of the Viterbi-Decoding Performance in the Presence of Narrowband noise in Power-Line Environment,” in Proceedings of IEEE-Africon11, Livingstone, Zambia, September 13-15, 2011, In the proceedings.- T. Lukusa,
**K. Ouahada**and H. C. Ferreira, “Frequency Mappings with Hadamard Transform for Power Line Communications Channel,” in Proceedings of the IEEE International Symposium on Power-line Communications and its applications, Udine, Italy, April 3-6, 2011, pp. 418-423. **K. Ouahada**and H. C. Ferreira, “A Graph Analysis Approach of Spectral Shaping Properties, in Proceedings of the IEEE African Winter School on Information Theory and Communications, Kruger Park, South Africa, June 1-4, 2010, pp. 22.**K. Ouahada**, H. C. Ferreira and L. Cheng, “Distance-optimality study for permutation codes using cyclic-shift prefix/suffix technique,” in Proceedings of IEEE-Africon09, Nairobi, Kenya, September 23-25, 2009, pp. 1-6.**K. Ouahada**, H. C. Ferreira and T. G. Swart, “New error-correcting ternary line codes with additional nulls,” in Proceedings of IEEE-Africon09, Nairobi, Kenya, September 23-25, 2009, pp. 1-6.**K. Ouahada**and H. C. Ferreira, “A Graph theoretic approach for spectral null codes,” in Proceedings of the Information Theory Workshop, Taormina, Sicily, Italy, October 11-16, 2009, pp. 369-373.**K. Ouahada**and H. C. Ferreira, “k-Cube construction for mappings from binary vectors to permutation sequences,” in Proceedings of IEEE International Symposium on Information Theory, Seoul, South Korea, June 28-July 3, 2009, pp. 630-634.- L. Cheng, H. C. Ferreira and
**K. Ouahada**, “k-Bit grouping moment balancing templates for spectral shaping codes, in Proceedings of the Information Theory Workshop, Porto, Portugal, May 5-9, 2008, pp. 426-430. **K. Ouahada**, A. J. Snyders, H. C. Ferreira and T. G. Swart, “Experimental verification of compensation of fades with spectral nulls in power-line channels,” in Proceedings of the International Symposium on Power-line Communications and its applications, Jeju Island, South Korea, April 26-29, 2008, pp. 325-330.**K. Ouahada**, H. C. Ferreira and T. G. Swart, “New DC-free multilevel line codes with spectral nulls at rational submultiples of the symbol frequency,” in Proceedings of the International Symposium on Communication Theory and its Applications, Ambleside, England, July 16-20, 2007, published on CD (6 pages).**K. Ouahada**, H. C. Ferreira, A. J. Snyders, A. J. H. Vinck and T. G. Swart, “Error correction of frequency-selective fading channels with spectral nulls codes,” in Proceedings of IEEE-Africon07, Windhoek, Namibia, September 26-28, 2007, pp. 1-7.**K. Ouahada**, H. C. Ferreira, A. J. H. Vinck, A. J. Snyders and T. G. Swart, “Cancellation and error correction for narrowband interference with spectral nulls codes and OFDM modulation,” in Proceedings of IEEE-Africon07, Windhoek, Namibia, September 26-28, 2007, pp. 1-7.**K. Ouahada**, T. G. Swart, H. C. Ferreira and L. Cheng, “Spectral shaping technique for permutation distance- preserving mapping codes,” in Proceedings of the IEEE Information Theory Workshop, Tahoe City, CA, USA, September 2-6, 2007, pp. 36-41.**K. Ouahada**, T. G. Swart and H. C. Ferreira, “Binary permutation sequences as subsets of Levenshtein codes and spectral nulls codes,” in Proceedings of the IEEE Information Theory Workshop, Chengdu, China, October 22-26, 2006, pp. 535-539.**K. Ouahada**, H. C. Ferreira, A. J. H. Vinck and D. J. J. Versfeld, “Combined non-binary codes and M-FSK modulation for power-line communications,” in Proceedings of the International Symposium on Power-line Communications and its applications, Orlando, Florida, USA, March 26-29, 2006, pp. 110-115.**K. Ouahada**, H. C. Ferreira, A. J. H. Vinck and W. A. Clarke, “Combined higher order spectral nulls codes and OFDM modulation for power line communications,” in Proceedings of the International Symposium on Power-line Communications and its applications, Orlando, Florida, USA, March 26-29, 2006, pp. 122-127.**K. Ouahada**, H. C. Ferreira, L. Cheng and A. J. H. Vinck, “On combined spectral shaping coding and M-FSK modulation for power-line communications,” in Proceedings of the International Symposium on Power-line Communications and its applications, Vancouver, Canada, April 6-8, 2005, pp. 351-355.**K. Ouahada**and H. C. Ferreira, “Viterbi decoding of ternary line codes,” in Proceedings of the IEEE International Conference on Communications, Paris, France, June 20-24, 2004, vol.2, pp. 667-671.