| 2019 | ISCAS | RF Rectifier Absolute Figure of Merit Based on Relative Comparison with Reference Rectifier. | Koji Kotani, Shota Inoue, Takao Komiyama, Yasunori Chonan, Hiroyuki Yamaguchi |
| 2010 | ASPDAC | A WiMAX turbo decoder with tailbiting BIP architecture. | Hiroaki Arai, Naoto Miyamoto, Koji Kotani, Hisanori Fujisawa, Takashi Ito |
| 2007 | ASPDAC | Improving Execution Speed of FPGA using Dynamically Reconfigurable Technique. | Roel Pantonial, Md. Ashfaquzzaman Khan, Naoto Miyamoto, Koji Kotani, Shigetoshi Sugawa, Tadahiro Ohmi |
| 2006 | ISCAS | Fast encoding method for vector quantization based on sorting elements of codewords to adaptively constructing subvectors. | Zhibin Pan, Koji Kotani, Tadahiro Ohmi |
| 2005 | ICASSP | Fast Encoding Method for Vector Quantization Based on a New Mixed Pyramid Data Structure. | Zhibin Pan, Koji Kotani, Tadahiro Ohmi |
| 2005 | ICIP | Enhanced fast encoding method for vector quantization by finding an optimally-ordered Walsh transform kernel. | Zhibin Pan, Koji Kotani, Tadahiro Ohmi |
| 2005 | ISCAS | Improved fast encoding method for vector quantization based on subvector technique. | Zhibin Pan, Koji Kotani, Tadahiro Ohmi |
| 2004 | ASPDAC | A small-area high-performance 512-point 2-dimensional FFT single-chip processor. | Naoto Miyamoto, Leo Karnan, Kazuyuki Maruo, Koji Kotani, Tadahiro Ohmi |
| 2004 | ASPDAC | The flexible processor an approach for single-chip hardware emulation by dynamic reconfiguration. | Takeshi Ohkawa, Toshiyuki Nozawa, Masanori Fujibayashi, Naoto Miyamoto, Leo Karnan, Soichiro Kita, Koji Kotani, Tadahiro Ohmi |
| 2004 | ICASSP | A memory-efficient fast encoding method for vector quantization using 2-pixel-merging sum pyramid. | Zhibin Pan, Koji Kotani, Tadahiro Ohmi |
| 2004 | ICIP | Improved fast search method for vector quantization using discrete walsh transform. | Zhibin Pan, Koji Kotani, Tadahiro Ohmi |
| 2003 | ASPDAC | A still image encoder based on adaptive resolution vector quantization employing needless calculation elimination architecture. | Masanori Fujibayashi, Toshiyuki Nozawa, Takahiro Nakayama, Kenji Mochizuki, Koji Kotani, Shigetoshi Sugawa, Tadahiro Ohmi |
| 2003 | ICIP | Still image compression method based on adaptive block segmentation vector quantization technique. | Takahiro Nakayama, Koji Takeuchi, Masahiro Konda, Koji Kotani, Tadahiro Ohmi |
| 2003 | ISCAS | A post-processing method for vector quantization to achieve higher PSNR and nearly constant bit rate. | Zhibin Pan, Koji Kotani, Tadahiro Ohmi |
| 2002 | ICIP | Face recognition using vector quantization histogram method. | Koji Kotani, Feifei Lee, Qiu Chen, Tadahiro Ohmi |
| 2002 | ISCAS | A hierarchical fast encoding algorithm for vector quantization with PSNR equivalent to full search. | Zhibin Pan, Koji Kotani, Tadahiro Ohmi |
| 2000 | Interspeech | A fast search method of speaker identification for large population using pre-selection and hierarchical matching. | Zhibin Pan, Koji Kotani, Tadahiro Ohmi |