Testing the Digital Modulation of PHS Devices. - Koji Asami (ITC, 1996)

A method to improve the performance of high-speed waveform digitizing. - Koji Asami; Shinsuke Tajiri (ITC, 1999)

WCDMA Testing with a Baseband/IF Range AWG. - Koji Asami; Yasuo Furukawa; Michael Purtell; Motoo Ueda; Karl Watanabe; Toshifumi Watanabe (ITC, 2002)

Technique to improve the performance of time-interleaved A-D converters. - Koji Asami (ITC, 2005)

An algorithm to evaluate wide-band quadrature mixers. - Koji Asami (ITC, 2007)

An Algorithm to Improve the Performance of M-Channel Time-Interleaved A-D Converters. - Koji Asami (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007)

Technique to Improve the Performance of Time-Interleaved A-D Converters with Mismatches of Non-linearity. - Koji Asami; Hidetaka Suzuki; Hiroyuki Miyajima; Tetsuya Taura; Haruo Kobayashi 001 (ATS, 2008)

An Algorithm to Evaluate Imbalances of Quadrature Mixers. - Koji Asami; Michiaki Arai (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009)

Technique to Improve the Performance of Time-Interleaved A-D Converters with Mismatches of Non-linearity. - Koji Asami; Takahide Suzuki; Hiroyuki Miyajima; Tetsuya Taura; Haruo Kobayashi 001 (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009)

Evaluation techniques of frequency-dependent I/Q imbalances in wideband quadrature mixers. - Koji Asami; Toshiaki Kurihara; Yushi Inada (ITC, 2010)

Timing skew compensation technique using digital filter with novel linear phase condition. - Koji Asami; Hiroyuki Miyajima; Tsuyoshi Kurosawa; Takenori Tateiwa; Haruo Kobayashi 001 (ITC, 2010)

Digital Compensation for Timing Mismatches in Interleaved ADCs. - Ru Yi; Minghui Wu 008; Koji Asami; Haruo Kobayashi 001; Ramin Khatami; Atsuhiro Katayama; Isao Shimizu; Kentaroh Katoh (Asian Test Symposium, 2013)

Novel estimation method of EVM with channel correction for linear impairments in multi-standard RF transceivers. - Koji Asami; Takashi Shimura; Toshiaki Kurihara (VTS, 2013)

Rectangular Waveform Generation with Harmonics Suppression. - Masayuki Kawabata; Koji Asami; Shohei Shibuya; Tomonori Yanagida; Haruo Kobayashi 001 (ATS, 2016)

Novel crosstalk evaluation method for high-density signal traces using clock waveform conversion technique. - Takayuki Nakamura; Koji Asami (ITC, 2016)

Fibonacci sequence weighted SAR ADC as golden section search. - Hirotaka Arai; Takuya Arafune; Shohei Shibuya; Yutaro Kobayashi; Koji Asami; Haruo Kobayashi 001 (ISPACS, 2017)

Low-distortion signal generation for analog/mixed-signal circuit testing with digital ATE. - Masayuki Kawabata; Koji Asami; Shohei Shibuya; Tomonori Yanagida; Haruo Kobayashi 001 (ITC-Asia, 2017)

Low-Distortion One-Tone and Two-Tone Signal Generation Using AWG Over Full Nyquist Region. - Tomonori Yanagida; Shohei Shibuya; Kosuke Machida; Koji Asami; Haruo Kobayashi 001 (ITC-Asia, 2018)

Innovative practices on test in Japan. - Koji Asami; Yoshiro Tamura; Haruo Kobayashi 001; Jun Matsushima; Yoichi Maeda; Kazumi Hatayama (VTS, 2018)

Analysis and Evaluation Method of RC Polyphase Filter. - Koji Asami; Nene Kushita; Akemi Hatta; Minh Tri Tran 001; Yoshiro Tamura; Anna Kuwana; Haruo Kobayashi 001 (ASICON, 2019)

Analog / Mixed-Signal / RF Circuits for Complex Signal Processing. - Haruo Kobayashi 001; Nene Kushita; Minh Tri Tran 001; Koji Asami; Hao San; Anna Kuwana; Akemi Hatta (ASICON, 2019)

Crest Factor Controlled Multi-Tone Signals for Analog/Mixed-Signal IC Testing. - Yukiko Shibasaki; Koji Asami; Anna Kuwana; Kosuke Machida; Yuanyang Du; Akemi Hatta; Kazuyoshi Kubo; Haruo Kobayashi 001 (ITC-Asia, 2019)

Physical Meanings of Fractal Behaviors of Water in Aqueous and Biological Systems with Open-Ended Coaxial Electrodes. - Shin Yagihara; Rio Kita; Naoki Shinyashiki; Hironobu Saito; Yuko Maruyama; Tsubasa Kawaguchi; Kohei Shoji; Tetsuya Saito; Tsuyoshi Aoyama; Ko Shimazaki; Keisuke Matsumoto; Minoru Fukuzaki; et al. (Sensors, 2019)

Theoretical Analysis on Noise Performance of Modulated Wideband Converters for Analog Testing. - Zolboo Byambadorj; Koji Asami; Takahiro J. Yamaguchi; Akio Higo; Masahiro Fujita; Tetsuya Iizuka (ATS, 2020)

Analysis and Design of Multi-Tone Signal Generation Algorithms for Reducing Crest Factor. - Yukiko Shibasaki; Koji Asami; Riho Aoki; Akemi Hatta; Anna Kuwana; Haruo Kobayashi 001 (ATS, 2020)

Study on Crest Factor Controlled Multi-Tone Signal for Analog RF Circuit Testing. - Yukiko Shibasaki; Koji Asami; Akemi Hatta; Riho Aoki; Anna Kuwana; Haruo Kobayashi 001 (ISOCC, 2020)

Ultra-Wideband Modulation Signal Measurement Using Local Sweep Digitizing Method. - Koji Asami; Keisuke Kusunoki; Nobuhiro Shimizu; Yoshiyuki Aoki (VTS, 2020)

Theoretical Analysis of Noise Figure for Modulated Wideband Converter. - Zolboo Byambadorj; Koji Asami; Takahiro J. Yamaguchi; Akio Higo; Masahiro Fujita; Tetsuya Iizuka (IEEE Trans. Circuits Syst. I Regul. Pap., 2020)

A Calibration Technique for Simultaneous Estimation of Actual Sensing Matrix Coefficients on Modulated Wideband Converters. - Zolboo Byambadorj; Koji Asami; Takahiro J. Yamaguchi; Akio Higo; Masahiro Fujita; Tetsuya Iizuka (IEEE Trans. Circuits Syst., 2020)

Application of Residue Sampling to RF/AMS Device Testing. - Shogo Katayama; Yudai Abe; Anna Kuwana; Koji Asami; Masahiro Ishida; Ryuya Ohta; Haruo Kobayashi 001 (ATS, 2021)

High-Precision Sub-Nyquist Sampling System Based on Modulated Wideband Converter for Communication Device Testing. - Zolboo Byambadorj; Koji Asami; Takahiro J. Yamaguchi; Akio Higo; Masahiro Fujita; Tetsuya Iizuka (IEEE Trans. Circuits Syst. I Regul. Pap., 2022)