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  1. Takayuki Shinomiya, and Takahiko Saba, "SVD-MIMO transmission scheme for enhancing channel polarization in polar coding," IEICE International Conference on Emerging Technologies for Communications (ICETC 2020), Nov. 2020.
  2. Hiroto Hirama, and Takahiko Saba, "Complexity reduction of MPA detection using joint IQ factor graph in SCMA," IEEE Vehicular Technology Conference Spring (VTC2020 Spring), Online, May 2020.
  3. Takumi Kandatsu, and Takahiko Saba, "Generator matrix based puncturing in polar coding," International Conference on Signal Processing and Communication Systems (ICSPCS 2019), Gold Coast, Australia, Dec. 2019.
  4. Yoshitaka Takeuchi, Shintaro Ebi, and Takahiko Saba, "Reduction in complexity of MPA detection with codebook using null symbol in SCMA systems," RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'19), Hawaii, USA, Mar. 2019.
  5. Masahiro Oda and Takahiko Saba, "Polar coding with enhanced channel polarization under frequency selective fading channels," IEEE International Conference on Communications (ICC2018), Kansas City, U.S.A. May 2018.
  6. Satoru Nakajima, and Takahiko Saba, ''Tomlinson-Harashima precoding for physical layer security in MIMO-OFDM systems, Asia-Pacific Conference on Communications (APCC2017) , Perth, Australia, Dec. 2017.
  7. Yuki Tanigawa, Yu Kozai, and Takahiko Saba, "A physical layer security scheme employing imaginary receiver for multiuser MIMO-OFDM systems," IEEE International Conference on Communications (ICC2017), Paris, France, May 2017.
  8. Shintaro Ebi and Takahiko Saba, "Effect of spatial multiplexing on the performance of MPA detection in downlink SCMA," International Conference on Signal Processing and Communication Systems (ICSPCS 2016), Gold Coast, Australia, Dec. 2016.
  9. Yu Kozai and Takahiko Saba, "An artificial fast fading generation scheme for physical layer security of MIMO-OFDM systems," International Conference on Signal Processing and Communication Systems (ICSPCS 2015), Cairns, Australia, Dec. 2015. DOI: 10.1109/ICSPCS.2015.7391734
  10. Tomoki Akitaya and Takahiko Saba, "Energy efficient artificial fast fading for MISO-OFDM systems,” IEEE 2015 Global Telecommunications Conference (GLOBECOM 2015), San Diego, U.S.A., Dec. 2015. DOI: 10.1109/GLOCOM.2014.7417411
  11. Gouki Iwasaki, Takahiko Saba, Yukitoshi Sanada, "A complexity-reduced joint maximum likelihood detection for NOMA/MIMO systems," International Workshop on Vision, Communications and Circuits (IWVCC'15), Yokohama, Japan, Nov. 2015.
  12. Yudai Hosaka and Takahiko Saba, "Energy-efficient artificial noise generation scheme for secure multiuser MIMO-OFDM communications,” IEEE Asia Pacific Wireless Communication Symposium (APWCS 2015), Singapore, Aug. 2015.
  13. Kenji Ando, Yukitoshi Sanada, and Takahiko Saba, "Joint maximum likelihood detection in far user of non-orthogonal multiple access,” IEEE Asia Pacific Wireless Communication Symposium (APWCS 2015), Singapore, Aug. 2015.
  14. Taisuke Abe and Takahiko Saba, "Iterative multi-cell channel estimation for inter-cell interference suppression,” RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'15), Kuala Lumpur, Malaysia, Feb. 2015.
  15. Atsuki Nakano and Takahiko Saba, "A handover scheme based on signal power of coordinated base stations for CoMP joint processing systems,” International Conference on Signal Processing and Communication Systems (ICSPCS 2014), Gold Coast, Australia, Dec. 2014. DOI: 10.1109/ICSPCS.2014.7021097
  16. Kei Kaiho and Takahiko Saba, "Modified mutual superposition transmission with complexity-reduced detection for spatial multiplexing OFDM systems,” IEEE Vehicular Technology Conference Fall (VTC2014 Fall), Vancouver, Canada, Sept. 2014. DOI: 10.1109/VTCFall.2014.6966057
  17. Tomoki Akitaya, Shunta Asano, and Takahiko Saba, "Time-domain artificial noise generation technique using time-domain and frequency-domain processing for physical layer security in MIMO-OFDM systems,” IEEE International Conference on Communications (ICC’14) - Workshop on Wireless Physical Layer Security, pp.807-812, Sydney, Australia, June 2014. DOI: 10.1109/ICCW.2014.6881299
  18. Takahiko Saba, "Mutual superposition transmission for spatial multiplexing OFDM systems,” IEEE Vehicular Technology Conference Spring (VTC2014 Spring), Seoul, Korea, May 2014. DOI: 10.1109/VTCSpring.2014.7022999
  19. Tomoki Akitaya, and Takahiko Saba, "Hierarchical multi-stage interference alignment for downlink heterogeneous networks," Asia Pacific Signal and Information Processing Association - Annual Summit and Conference (APSIPA ASC 2013), Kaohsiung, Taiwan, Oct. 2013.
  20. Kei Kaiho, and Takahiko Saba, "Linear precoding for channel orthogonalization with reduced restrictions on antenna assignment in multiuser MIMO-OFDM," RISP International Workshop on Nonlinear Circuits and Signal Processing (NCSP'13), pp.385-388, Hawaii, U.S.A., March 2013.
  21. Masahiro Yasukawa, Takahiko Saba, "Time-domain ML channel estimation considering antenna switching time for RF-MIMO-OFDM," IEEE GLOBECOM 2011 Broadband Wireless Access Workshop, Houston, U.S.A., Dec. 2011.
  22. Takahiko Saba, "Experimental implementation of an intrusion detection system using WLAN signals," Asia Pacific Signal and Information Processing Association - Annual Summit and Conference (APSIPA ASC 2011), Xi'an, PRC, Oct. 2011.
  23. Tatsuya Yoshioka, and Takahiko Saba, "Performance of space-time-user and space-frequency-user block codes for forward link multiuser MIMO-OFDM systems," IEEE Asia Pacific Wireless Communication Symposium (APWCS 2011), Singapore, Aug. 2011.
  24. Yuuki Tani, and Takahiko Saba, "Quantization scheme for energy detector of soft decision cooperative spectrum sensing in cognitive radio," IEEE GLOBECOM 2010 Workshop on Seamless Wireless Mobility, Miami, U.S.A., Dec. 2010.
  25. Shingo Sasaki, and Takahiko Saba, "Space-time coding scheme for forward link multiuser STBC-OFDM systems," IEEE GLOBECOM 2009 Broadband Wireless Access Workshop, Hawaii, U.S.A., 2009-11.
  26. Natsuki Oyamada, and Takahiko Saba, "Decision feedback channel estimation combined with sample selection and extrapolation for OFDM systems," International Workshop on Vision, Communications and Circuits (IWVCC 2008), Xi'an, PRC, Nov. 2008.
  27. Masahiro Saegusa, and Takahiko Saba, "Effect of Inter-code Interference Cancellation on STFBC-OFDM under Time and Frequency Selective Fading Environments," IEEE 2007 Global Telecommunications Conference (GLOBECOM 2007), Washington D.C., U.S.A., Dec. 2007.
  28. Takahiko Saba, and Jun Konishi, "Reduction of computational complexity using interference cancellation in maximum likelihood receiver for SDM systems," International Symposium on Nonlinear Theory and its Applications (NOLTA2007), pp.84-87, Vancouver, Canada, Sept. 2007.
  29. Masaki Ogata, and Takahiko Saba, "Frequency offset compensation scheme using soft interference cancellation in reverse link of MIMO-OFDMA systems," International Symposium on Nonlinear Theory and its Applications (NOLTA2007), pp.88-91, Vancouver, Canada, Sept. 2007.
  30. Yuusuke Miyauchi, and Takahiko Saba, "Turbo equalization combined timing and frequency offsets compensation in uplink OFDMA systems," IEEE 2006 Global Telecommunications Conference (GLOBECOM 2006), San Francisco, U.S.A., Dec. 2006.
  31. Ryu Atsuta, and Takahiko Saba, "Adaptive node selection algorithm for co-operative multi-hop networks," International Symposium on Information Theory and Its Applications (ISITA2006), Seoul, Korea, Oct. 2006.
  32. Yuusuke Miyauchi, and Takahiko Saba, "Frequency domain turbo equalization combined with frequency offset compensation in uplink OFDMA systems," International Symposium on Information Theory and Its Applications (ISITA2006), Seoul, Korea, Oct. 2006.
  33. Shoichi Sasahara, and Takahiko Saba, "Turbo detector using modified SISO-MLD for CCI suppression in LDPC coded SDM-OFDM systems," International Symposium on Information Theory and Its Applications (ISITA2006), Seoul, Korea, Oct. 2006.
  34. Jun Konishi, and Takahiko Saba, "A new SDM transmit scheme using HARQ with MRC," IEEE 2005 Global Telecommunications Conference (GLOBECOM 2005), St. Louis, U.S.A., Dec. 2005.
  35. Naoto Egashira, Hiroo Takayama, and Takahiko Saba, "Improvement of CCI compensation accuracy using feedback phase tracking in MIMO-OFDM systems," IEEE 2004 Global Telecommunications Conference (GLOBECOM 2004), Dallas, U.S.A., Dec. 2004.
  36. Hisanori Sawa, Yoshihiro Kunimoto, and Takahiko Saba, "A novel MLI transmission scheme using code selection patterns in MC-CDMA systems with LA," IEEE Region 10 Conference (TENCON 2004), Chiang Mai, Thailand, Nov. 2004.
  37. Hisanori Sawa, and Takahiko Saba, "A hybrid adaptive MIMO-OFDM system," International Symposium on Information Theory and Its Applications (ISITA2004), pp.595-600, Parma, Italy, Oct. 2004.
  38. Hiroo Takayama, and Takahiko Saba, "A phase tracking scheme with feedback correction for residual frequency offset and phase noise in OFDM systems," RISP International Workshop on Nonlinear Circuits and Signal Processing (NCSP'04), pp.33-36, Hawaii, U.S.A., March 2004.
  39. Yoshihiro Kunimoto, Hisanori Sawa, and Takahiko Saba, "MC-CDMA system using hybrid ARQ without transmitting parity bits," 5th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT2003), pp.359-363, Noumea, New Caledonia, Nov. 2003.
  40. Yoshihiro Kunimoto, and Takahiko Saba, "Hybrid ARQ system using two systematic codes," International Symposium on Information Theory and Its Applications (ISITA2002), pp.243-246, Xi'an, PRC, Oct. 2002.
  41. Chikara Kojima and Takahiko Saba, "Improvement of BPSK space-time turbo code with full antenna diversity," IEEE 2002 International Conference on Communications (ICC'02), pp.1625-1629, New York, U.S.A., April 2002.
  42. Masaki Shibahara, Takeo Fujii, Takahiko Saba, and Iwao Sasase, "Performance evaluation of frequency spread coding and frequency interleaving for OFDM systems using adaptive co-channel interference canceller," European Wireless 2002 (EW2002), pp.612-618, Florence, Italy, Feb. 2002.
  43. Kenkichi Takahashi, and Takahiko Saba, "A novel symbol synchronization algorithm with reduced influence of ISI for OFDM systems," IEEE 2001 Global Telecommunications Conference (GLOBECOM 2001), pp.524-528, San Antonio, U.S.A., Nov. 2001.
  44. Hiromasa Fujii, Takahiko Saba, and Iwao Sasase, "Novel decoding algorithm with weighting of extrinsic information for punctured turbo-codes," 4th European Personal Mobile Communications Conference (EPMCC 2001), Vienna, Austria, Feb. 2001.
  45. Masaki Shibahara, Hiromasa Fujii, Shingo Suwa, Takahiko Saba, and Iwao Sasase, "Multi-stage serial interference canceller with new interference rejection weight control using residual signal at the end of each stage for DS-CDMA systems," International Symposium on Information Theory and Its Applications (ISITA2000), pp.899-902, Hawaii, U.S.A., Dec. 2000.
  46. Masashi Akaiwa, Katsuhiro Kamakura, and Takahiko Saba, "A multicarrier DS/SS system using parallel combinatory scheme," International Symposium on Information Theory and Its Applications (ISITA2000), pp.752-755, Hawaii, U.S.A., Dec. 2000.
  47. Shingo Suwa, Takahiko Saba, Masayuki Ariyoshi, and Iwao Sasase, "Reduced complexity of multi-code DS-CDMA receiver using a COF only for pilot channel in forward link," IEEE Vehicular Technology Conference Fall (VTC2000 Fall), pp.401-405, Boston, U.S.A., Oct. 2000.
  48. Hiromasa Fujii, Kouhei Mizuno, Takahiko Saba, and Iwao Sasase, "RP-reconstructing ARP strategy for micro-cellular systems," IEEE Malaysia International Conference on Communication (MICC'99), pp.355-360 ,Melaka, Malaysia, Nov. 1999.
  49. Takahiko Saba, and Shinsaku Mori, "Synchronization characteristics of dual delay lock loop in the presence of code Doppler," IEEE International Symposium on Spread Spectrum Techniques and Applications (ISSSTA'98), pp.828-831, Sun City, South Africa, Sept. 1998.
  50. Takashi Shono, Takahiko Saba, Iwao Sasase, and Shinsaku Mori, "DS/SS predictive PN code tracking loop under the influence of Doppler effects," Asia Pacific Conference on Communications (APCC'97), pp.791-796, Sydney, Australia, Dec. 1997.
  51. Takahiko Saba, Yukio Sato, and Shinsaku Mori, "Performance of the time-shared code tracking loop with extended tracking range for frequency hopped signals," IEEE International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC'97), pp.332-336, Helsinki, Finland, Sept. 1997.
  52. Ken-ichiro Shinoi, Takahiko Saba, and Iwao Sasase, "Performance of multicarrier trellis-coded slow-FH/16QAM with an interference immunity decoding," IEEE International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC'97), pp.221-225, Helsinki, Finland, Sept. 1997.
  53. Minoru Kamata, Takashi Shono, Takahiko Saba, and Shinsaku Mori, "Third-order phase-locked loops using dual loops with improved stability," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, pp.338-341, Victoria, B.C., CANADA, 1997-08.
  54. Akira Shibutani, Takahiko Saba, Seiichiro Moro, and Shinsaku Mori, "Effect of transient response of Colpitts-VCO on performance of PLL system," IEEE Singapore International Conference on Communication systems (ICCS'96), pp.672-676, Singapore, 1996-11.
  55. Takashi Shono, Akira Shibutani, Takahiko Saba, and Shinsaku Mori, "Optimization of a modified PN code tracking loop under the influence of Doppler effects," International Symposium on Information Theory and Its Applications, (ISITA'96), pp.774-777, Victoria, B.C., CANADA, 1996-9.
  56. Takahiko Saba, and Duk-Kyu Park, and Shinsaku Mori, "Analysis of the frequency hopping code tracking loop with extended tracking range," 1996 International Conference on Teleommunications (ICT'96), pp.259-264, Istanbul, TURKEY, 1996-4.
  57. Hiroshi Sameshima, Takahiko Saba, Duk-Kyu Park, and Shinsaku Mori, "Fast switching frequency synthesizer for measuring instruments achieving fine frequency resolution with a simple structure," 1995 International Symposium on Communications (ISCOM'95), pp.672-677, Taipei, TAIWAN, R.O.C., 1995-12.
  58. Hiroshi Sameshima, Takahiko Saba, and Shinsaku Mori, "Fast frequency switching PLL-FM modulator varying division ratios of an N-stage cycle swallower," Internatoinal Symposium on Nonlinear Theory and its Applications (NOLTA'95), pp.1069-1072, Las Vegas, Nev., U.S.A., 1995-12.
  59. Takahiko Saba, and Duk-Kyu Park, and Shinsaku Mori, "A modified time-shared code tracking loop for frequency hopping systems," IEEE 1995 Global Teleommunications Conference (GLOBECOM'95), pp.1884-1888, Singapore, 1995-11.
  60. Takahiko Saba and Shinsaku Mori, "Evaluation of FH code tracking loop insensitive to gain imbalance," International Conference on Personal Wireless Communications (ICPWC'95), p.17, Victoria, B.C., CANADA, 1995-06.
  61. Akira Shibutani, Hiroshi Sameshima, Seiichiro Moro, Takahiko Saba, and Shinsaku Mori, "Analysis of PLL frequency synthesizer considering transient response of the VCO represented as Van der Pol equation," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, pp.355-358, Victoria, B.C., CANADA, 1995-05.
  62. Fumiyo Sato, Takahiko Saba, Duk-Kyu Park, and Shinsaku Mori, "Performance evaluation of digital phase-locked loop using fractional divider," International Symposium on Information Theory and Its Applications, (ISITA'94) pp.1107-1110, Sydney, Australia, 1994-11.
  63. Koji Nemoto, Takahiko Saba, and Iwao Sasase, "Viterbi-decoding differential detection of 16DAPSK," International Symposium on Information Theory and Its Applications, (ISITA'94) pp.849-852, Sydney, Australia, 1994-11.
  64. Takahiko Saba, Duk-Kyu Park, and Shinsaku Mori, "Analysis of frequency-hopped signal tracking loop," International Symposium on Information Theory and Its Applications, (ISITA'94) pp.133-137, Sydney, Australia, 1994-11.
  65. Takahiko Saba, Duk-Kyu Park, and Shinsaku Mori, "Fast acquisition PLL synthesizer using parallel N-stage cycle swallower (NSCS)," Proc. of IEEE Third International Symposium on Spread Spectrum Techniques & Applications (ISSSTA'94), pp.352-356, Oulu, Finland, July 1994. DOI: 10.1109/ISSSTA.1994.379565
  66. Fumiyo Sato, Takahiko Saba, Duk-Kyu Park, and Shinsaku Mori, "Digital phase-locked loop with wide lock-in range using fractional divider," Proc. of IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, pp.431-434, Victoria, B.C., CANADA, May 1993. DOI: 10.1109/PACRIM.1993.407329
  67. Takahiko Saba, Duk-Kyu Park, and Shinsaku Mori, "Fast acquisition PLL synthesizer with improved N-stage cycle swallower," Proc. of IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, pp.77-80, Victoria, B.C., CANADA, May 1993. DOI: 10.1109/PACRIM.1993.407216

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