Defne Aktas
Publications
Book Chapter
- Emre Aktas, Defne Aktas, Stephen Hanly, and Jamie Evans, Turbo Base Stations, in Cooperative Cellular Wireless Networks, E. Hossain, D. I. Kim, and V. K. Bhargava, Eds New York: Cambridge University Press, 2011, ch. 4, pp. 77-127.
Journal Papers
- Turgut Baris Tokel and Defne Aktas, "A Low-Complexity Transmission and Scheduling Scheme For WiMAX Systems With Base Station Cooperation," EURASIP Journal on Wireless Communications and Networking, vol. 2010, pp. 1-10, DOI: 10.1155/2010/527591, 2010.
- Boon L. Ng, Jamie S. Evans, Stephen V. Hanly and Defne Aktas, "Distributed downlink beamforming with cooperative base stations," IEEE Trans. Inform. Theory, vol. 54, no. 12, pp. 5491-5499, Dec. 2008.
- Ugur Olgun, Celal Alp Tunc, Defne Aktas, Vakur B. Erturk and Ayhan Altintas, "Particle swarm optimization of dipole arrays for superior MIMO capacity," Microwave and Optical Technology Letters, vol. 51, no. 2, pp. 333-337, February 2009.
- Celal Alp Tunc, Defne Aktas, Vakur B. Erturk and Ayhan Altintas, "Capacity of printed dipole arrays in the MIMO channels," IEEE Antennas and Propagation Magazine, vol. 50, no.5, pp. 190-198, October 2008.
- Defne Aktas, M. Naeem Bacha, Jamie Evans, and Stephen V. Hanly,
"Scaling results on the sum capacity of multiuser MIMO Systems," IEEE
Trans. Inform. Theory, vol. 52, pp. 3264-3274, July 2006.
- Hesham El Gamal, Defne Aktas and M. Oussama Damen, "Noncoherent
space-time coding: An algebraic perspective," IEEE
Trans. Inform. Theory, vol. 51, pp. 2380-2390, July 2005.
- Defne Aktas and Michael P. Fitz, "Distance spectrum analysis of space-time trellis coded modulations in quasi-static Rayleigh fading channels," IEEE Trans. Inform. Theory, vol. 49, pp. 3335-3344, December 2003.
- Defne Aktas, Hesham El Gamal and Michael P. Fitz, "On the design and maximum likelihood decoding of space-time trellis codes," IEEE Trans. Commun., vol. 51, pp. 854-859, June 2003.
Conference Papers
- Turgut Baris Tokel and Defne Aktas, "Base station cooperation in multiple input multiple output (MIMO) orthogonal frequency division multiple access (OFDMA) systems," Proc. ICT-MobileSummit, Santander, Spain, June 2009.
- Turgut Baris Tokel and Defne Aktas, "Dikgen frekans bolmeli coklu erisim sistemlerinde telsiz erisim terminallerinin isbirligi," Proc. IEEE Sinyal Isleme, Iletisim ve Uygulamalari Kurultayi, Antalya, Turkey, April 2009 (in Turkish).
- Celal Alp Tunç, Vakur B. Ertürk, Defne Aktas, Ayhan Altintas, "MIMO kanalinda anten dizilerinin analiz ve tasarimi icin dogru ve Verimli bir teknik", Proc. URSI-Turkiye Ulusal Kongresi, Antalya, Turkey, October 2008 (in Turkish).
- Celal Alp Tunc, Defne Aktas, Vakur B. Erturk and Ayhan Altintas, "Capacity of printed dipole arrays in the MIMO channels," Proc. Vth International Workshop on Electromagnetic Wave Scattering, Antalya, Turkey, October 2008.
- Celal Alp Tunc, Vakur B. Erturk, Defne Aktas, Ayhan Altintas, "An accurate technique for array design and characterization in MIMO channel," Proc. General Assembly of the International Union of Radio Science (URSI), Chicago, Illinois, USA, August 2008.
- Yakup K. Yazarel and Defne Aktas,"Cok kullanicili cok antenli sistemlerde isbirlikli iletim," Proc. IEEE Sinyal Isleme, Iletisim ve Uygulamalari Kurultayi, Didim, Turkey, April 2008 (in Turkish).
- Ugur Olgun, Celal Alp Tunc, Defne Aktas, Vakur B. Erturk, Ayhan Altintas, "Optimization of linear wire antenna arrays to increase MIMO capacity using swarm intelligence," Proc. The Second European Conference on
Antennas and Propagation (EuCAP), Edinburg, UK, November 2007.
- Harun Bodur, celal Alp Tunc, Defne Aktas, Vakur B. Erturk, Ayhan Altintas, "Particle swarm optimization for SAGE maximization step in channel parameter estimation," Proc. The Second European Conference on
Antennas and Propagation (EuCAP), Edinburg, UK, November 2007.
- Yakup K. Yazarel and Defne Aktas, "Downlink beamforming under
individual SINR and per antenna power constraints," Proc. Pacific Rim
Conference on Communications, Computers and Signal Processing, Victoria,
Canada, August 2007.
- Celal A. Tunc, Erdinc Irci, Onur Bakir, Defne Aktas, Vakur B. Erturk
and Ayhan Altintas, "A model with electric fields for the inclusion of
mutual coupling effects in the MIMO channel," Proc. IEEE
International Symposium on Antennas and Propagation, Honolulu, USA, June
2007.
- Celal A. Tunc, Erdinc Irci, Onur Bakir, Defne Aktas, Vakur B. Erturk
and Ayhan Altintas, "Investigation of planar and conformal printed arrays
for MIMO performance analysis," Proc. The First European Conference on
Antennas and Propagation (EuCAP), Nice, France, November 2006.
- Celal Alp Tunc, Defne Aktas and Ayhan Altintas, "MIMO kablosuz haberlesme kanallarinda ortak baglasimli ince dipol anten dizileri", Proc. URSI-Turkiye Ulusal Kongresi, Ankara, Turkey, September 2006 (in Turkish).
- Keziban Akkaya, Celal A. Tunc, Defne Aktas and Ayhan Altintas, "On the number of clusters in channel model," Proc. 9th Int. Symp. Spread Spec. Tech. and Applic. (ISSSTA), Manaus, Brazil, August 2006.
- Celal A. Tunc, Defne Aktas and Ayhan Altintas, "Performance analysis of uniform circular arrays with mutual coupling in MIMO channels," Proc. USNC/URSI National Radio Science Meeting, Albuquerque, USA, July 2006.
- Celal A. Tunc, Defne Aktas and Ayhan Altintas, "On arrays of dipole antennas with mutual coupling in MIMO wireless channels," Proc. 15th IST Mobile and Wireless Commun. Summit, Myconos, Greece, June 2006.
- Boon L. Ng, Jamie S. Evans, Stephen V. Hanly and Defne Aktas,
"Transmit Beamforming with Cooperative Base Stations", Proc. IEEE Int. Symp. Inform. Theory (ISIT), Adelaide,
Australia, September 2005.
- Defne Aktas, M. Naeem Bacha, Jamie Evans and Stephen Hanly, "On the
sum capacity of multiuser MIMO channels", Proc. Int. Symp. Inform. Theory and Appl (ISITA), Parma, Italy, October 2004.
- Hesham El Gamal, Defne Aktas and M. Oussama Damen, "Coherent space-time codes for noncoherent channels," Proc. IEEE Global Telecommun. Conf. (GLOBECOM), vol.4, pp. 915-919, San Francisco, USA, December 2003.
- Hesham El Gamal and Defne Aktas, "Distributed space-time filtering for cooperative wireless networks," Proc. IEEE Global Telecommun. Conf. (GLOBECOM), vol. 4, 1826-1830, San Francisco, USA, December 2003.
- Defne Aktas and Hesham El Gamal, "Multiuser scheduling for MIMO wireless systems," Proc. IEEE Vehicular Tech. Conf. (VTC), vol.3, pp. 1743-1747, Orlando, USA, October 2003.
- Defne Aktas, Hesham El Gamal and Michael P. Fitz, "Towards optimal space-time coding," Proc. IEEE Asilomar Conf. Signals, Systems and Computers, vol.2, pp. 1137-1141, Pacific Grove, USA, November 2002.
- Hesham El Gamal, Michael P. Fitz and Defne Aktas, "Canonical space-time coding," Proc. Allerton Conf. Communications, Control and Computing, pp. 845-854, Monticello, USA, October 2001.
- Defne Aktas and Michael P. Fitz, "Distance spectra of space-time trellis coded modulations," Proc. IEEE Int. Symp. Inform. Theory (ISIT), pp. 328, Washington, USA, June 2001.
- Defne K. Aktas and Michael P. Fitz, "Computing the distance spectrum of space-time trellis codes," Proc. IEEE Wireless Commun. Network. Conf. (WCNC), vol. 1., pp. 51-55, Chicago, USA, September 2000.
- Defne Kucukyavuz and Michael P. Fitz, "New views of transfer function based performance analysis of coded modulations, Proc. IEEE Asilomar Conf. Signals, Systems and Computers, vol.1, pp. 42-46, Pacific Grove, USA, October 1999.
Dissertations
- Defne Aktas, Improved Performance Measures for Space-Time Coding with Applications to Code Design, Ph.D. dissertation, The Ohio State University, Columbus, USA, 2002.
- Defne Kucukyavuz, Transmit Diversity Schemes for Wireless Communications over Rayleigh Fading Channels, M.S. thesis, The Ohio State University, Columbus, USA, 1998.
Publications
Book Chapter
- Emre Aktas, Defne Aktas, Stephen Hanly, and Jamie Evans, Turbo Base Stations, in Cooperative Cellular Wireless Networks, E. Hossain, D. I. Kim, and V. K. Bhargava, Eds New York: Cambridge University Press, 2011, ch. 4, pp. 77-127.
Journal Papers
- Turgut Baris Tokel and Defne Aktas, "A Low-Complexity Transmission and Scheduling Scheme For WiMAX Systems With Base Station Cooperation," EURASIP Journal on Wireless Communications and Networking, vol. 2010, pp. 1-10, DOI: 10.1155/2010/527591, 2010.
- Boon L. Ng, Jamie S. Evans, Stephen V. Hanly and Defne Aktas, "Distributed downlink beamforming with cooperative base stations," IEEE Trans. Inform. Theory, vol. 54, no. 12, pp. 5491-5499, Dec. 2008.
- Ugur Olgun, Celal Alp Tunc, Defne Aktas, Vakur B. Erturk and Ayhan Altintas, "Particle swarm optimization of dipole arrays for superior MIMO capacity," Microwave and Optical Technology Letters, vol. 51, no. 2, pp. 333-337, February 2009.
- Celal Alp Tunc, Defne Aktas, Vakur B. Erturk and Ayhan Altintas, "Capacity of printed dipole arrays in the MIMO channels," IEEE Antennas and Propagation Magazine, vol. 50, no.5, pp. 190-198, October 2008.
- Defne Aktas, M. Naeem Bacha, Jamie Evans, and Stephen V. Hanly,
"Scaling results on the sum capacity of multiuser MIMO Systems," IEEE
Trans. Inform. Theory, vol. 52, pp. 3264-3274, July 2006.
- Hesham El Gamal, Defne Aktas and M. Oussama Damen, "Noncoherent
space-time coding: An algebraic perspective," IEEE
Trans. Inform. Theory, vol. 51, pp. 2380-2390, July 2005.
- Defne Aktas and Michael P. Fitz, "Distance spectrum analysis of space-time trellis coded modulations in quasi-static Rayleigh fading channels," IEEE Trans. Inform. Theory, vol. 49, pp. 3335-3344, December 2003.
- Defne Aktas, Hesham El Gamal and Michael P. Fitz, "On the design and maximum likelihood decoding of space-time trellis codes," IEEE Trans. Commun., vol. 51, pp. 854-859, June 2003.
Conference Papers
- Turgut Baris Tokel and Defne Aktas, "Base station cooperation in multiple input multiple output (MIMO) orthogonal frequency division multiple access (OFDMA) systems," Proc. ICT-MobileSummit, Santander, Spain, June 2009.
- Turgut Baris Tokel and Defne Aktas, "Dikgen frekans bolmeli coklu erisim sistemlerinde telsiz erisim terminallerinin isbirligi," Proc. IEEE Sinyal Isleme, Iletisim ve Uygulamalari Kurultayi, Antalya, Turkey, April 2009 (in Turkish).
- Celal Alp Tunç, Vakur B. Ertürk, Defne Aktas, Ayhan Altintas, "MIMO kanalinda anten dizilerinin analiz ve tasarimi icin dogru ve Verimli bir teknik", Proc. URSI-Turkiye Ulusal Kongresi, Antalya, Turkey, October 2008 (in Turkish).
- Celal Alp Tunc, Defne Aktas, Vakur B. Erturk and Ayhan Altintas, "Capacity of printed dipole arrays in the MIMO channels," Proc. Vth International Workshop on Electromagnetic Wave Scattering, Antalya, Turkey, October 2008.
- Celal Alp Tunc, Vakur B. Erturk, Defne Aktas, Ayhan Altintas, "An accurate technique for array design and characterization in MIMO channel," Proc. General Assembly of the International Union of Radio Science (URSI), Chicago, Illinois, USA, August 2008.
- Yakup K. Yazarel and Defne Aktas,"Cok kullanicili cok antenli sistemlerde isbirlikli iletim," Proc. IEEE Sinyal Isleme, Iletisim ve Uygulamalari Kurultayi, Didim, Turkey, April 2008 (in Turkish).
- Ugur Olgun, Celal Alp Tunc, Defne Aktas, Vakur B. Erturk, Ayhan Altintas, "Optimization of linear wire antenna arrays to increase MIMO capacity using swarm intelligence," Proc. The Second European Conference on Antennas and Propagation (EuCAP), Edinburg, UK, November 2007.
- Harun Bodur, celal Alp Tunc, Defne Aktas, Vakur B. Erturk, Ayhan Altintas, "Particle swarm optimization for SAGE maximization step in channel parameter estimation," Proc. The Second European Conference on Antennas and Propagation (EuCAP), Edinburg, UK, November 2007.
- Yakup K. Yazarel and Defne Aktas, "Downlink beamforming under individual SINR and per antenna power constraints," Proc. Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, Canada, August 2007.
- Celal A. Tunc, Erdinc Irci, Onur Bakir, Defne Aktas, Vakur B. Erturk and Ayhan Altintas, "A model with electric fields for the inclusion of mutual coupling effects in the MIMO channel," Proc. IEEE International Symposium on Antennas and Propagation, Honolulu, USA, June 2007.
- Celal A. Tunc, Erdinc Irci, Onur Bakir, Defne Aktas, Vakur B. Erturk and Ayhan Altintas, "Investigation of planar and conformal printed arrays for MIMO performance analysis," Proc. The First European Conference on Antennas and Propagation (EuCAP), Nice, France, November 2006.
- Celal Alp Tunc, Defne Aktas and Ayhan Altintas, "MIMO kablosuz haberlesme kanallarinda ortak baglasimli ince dipol anten dizileri", Proc. URSI-Turkiye Ulusal Kongresi, Ankara, Turkey, September 2006 (in Turkish).
- Keziban Akkaya, Celal A. Tunc, Defne Aktas and Ayhan Altintas, "On the number of clusters in channel model," Proc. 9th Int. Symp. Spread Spec. Tech. and Applic. (ISSSTA), Manaus, Brazil, August 2006.
- Celal A. Tunc, Defne Aktas and Ayhan Altintas, "Performance analysis of uniform circular arrays with mutual coupling in MIMO channels," Proc. USNC/URSI National Radio Science Meeting, Albuquerque, USA, July 2006.
- Celal A. Tunc, Defne Aktas and Ayhan Altintas, "On arrays of dipole antennas with mutual coupling in MIMO wireless channels," Proc. 15th IST Mobile and Wireless Commun. Summit, Myconos, Greece, June 2006.
- Boon L. Ng, Jamie S. Evans, Stephen V. Hanly and Defne Aktas,
"Transmit Beamforming with Cooperative Base Stations", Proc. IEEE Int. Symp. Inform. Theory (ISIT), Adelaide,
Australia, September 2005.
- Defne Aktas, M. Naeem Bacha, Jamie Evans and Stephen Hanly, "On the
sum capacity of multiuser MIMO channels", Proc. Int. Symp. Inform. Theory and Appl (ISITA), Parma, Italy, October 2004.
- Hesham El Gamal, Defne Aktas and M. Oussama Damen, "Coherent space-time codes for noncoherent channels," Proc. IEEE Global Telecommun. Conf. (GLOBECOM), vol.4, pp. 915-919, San Francisco, USA, December 2003.
- Hesham El Gamal and Defne Aktas, "Distributed space-time filtering for cooperative wireless networks," Proc. IEEE Global Telecommun. Conf. (GLOBECOM), vol. 4, 1826-1830, San Francisco, USA, December 2003.
- Defne Aktas and Hesham El Gamal, "Multiuser scheduling for MIMO wireless systems," Proc. IEEE Vehicular Tech. Conf. (VTC), vol.3, pp. 1743-1747, Orlando, USA, October 2003.
- Defne Aktas, Hesham El Gamal and Michael P. Fitz, "Towards optimal space-time coding," Proc. IEEE Asilomar Conf. Signals, Systems and Computers, vol.2, pp. 1137-1141, Pacific Grove, USA, November 2002.
- Hesham El Gamal, Michael P. Fitz and Defne Aktas, "Canonical space-time coding," Proc. Allerton Conf. Communications, Control and Computing, pp. 845-854, Monticello, USA, October 2001.
- Defne Aktas and Michael P. Fitz, "Distance spectra of space-time trellis coded modulations," Proc. IEEE Int. Symp. Inform. Theory (ISIT), pp. 328, Washington, USA, June 2001.
- Defne K. Aktas and Michael P. Fitz, "Computing the distance spectrum of space-time trellis codes," Proc. IEEE Wireless Commun. Network. Conf. (WCNC), vol. 1., pp. 51-55, Chicago, USA, September 2000.
- Defne Kucukyavuz and Michael P. Fitz, "New views of transfer function based performance analysis of coded modulations, Proc. IEEE Asilomar Conf. Signals, Systems and Computers, vol.1, pp. 42-46, Pacific Grove, USA, October 1999.
Dissertations
- Defne Aktas, Improved Performance Measures for Space-Time Coding with Applications to Code Design, Ph.D. dissertation, The Ohio State University, Columbus, USA, 2002.
- Defne Kucukyavuz, Transmit Diversity Schemes for Wireless Communications over Rayleigh Fading Channels, M.S. thesis, The Ohio State University, Columbus, USA, 1998.
