| 2006 | ISCC | New Spreading Codes for MC-CDMA and OFDM Systems. | Khoirul Anwar, Masato Saito, Takao Hara, Minoru Okada, Heiichi Yamamoto |
| 2006 | ISCC | Signal Cancellation for Satellite Frequency Reuse by Carrier Super-Positioning Multi-level Modulation. | Hiroyuki Kobashi, Mayumi Osato, Takao Hara, Minoru Okada, Heiichi Yamamoto |
| 2006 | IWCMC | Large code set for PAPR reduction of OFDM signals and capacity increasing in MC-CDMA system. | Khoirul Anwar, Masato Saito, Takao Hara, Minoru Okada, Heiichi Yamamoto |
| 2006 | VTC | Study for Various Array Antenna assisted Doppler Spread Compensator with MRC Diversity of ISDB-T Receiver. | Young-Cheol Yu, Minoru Okada, Heiichi Yamamoto |
| 2005 | ISCAS | Is home network application acceptable or not? | Ikuo Keshi, Yumi Shiraishi, Hiroaki Niwamoto, Minoru Okada, Heiichi Yamamoto |
| 2005 | PIMRC | Peak-to-Average Power Ratio Reduction Method Suitable for MC-CDMA System Downlink. | Masato Saito, Akihiro Okuda, Minoru Okada, Heiichi Yamamoto |
| 2005 | WCNC | Fast and accurate canceller on carrier super-positioning for VSAT frequency re-use. | Michihiro Ichikawa, Takao Hara, Minoru Okada, Heiichi Yamamoto, Kiyotake Ando |
| 2004 | PIMRC | Novel SIR measurement method for modified closed loop transmit diversity in W-CDMA. | Akhmad Unggul Priantoro, Minoru Okada, Heiichi Yamamoto |
| 2004 | PIMRC | Fast acquisition and low correlation multi-component code. | Masaya Tanigawa, Takao Hara, Mamoru Fukui, Heiichi Yamamoto |
| 2001 | VTC | Novel fast fading compensator for OFDM using space diversity with space-domain interpolator. | Hideaki Takayanagi, Minoru Okada, Heiichi Yamamoto |
| 1999 | PDPTA | Whole Data Visualization by Similarity Degree for Mobile and Adaptive Information Retrieval. | Kohei Yoshikawa, Heiichi Yamamoto |