An Improved Method for Digital SSB-FDM Modulation and Demodulation. - Rikio Maruta; Atsushi Tomozawa (IEEE Trans. Commun., 1978)

LSI signal processor development for communications equipment. - Takao Nishitani; Yuichi Kawakami; Rikio Maruta; Akira Sawai (ICASSP, 1980)

120-Channel Transmultiplexer Design and Performance. - Tomonori Aoyama; Fumio Mano; Kiyohisa Wakabayashi; Rikio Maruta; Atsushi Tomozawa (IEEE Trans. Commun., 1980)

A Simple Firmware Realization of PCM Framing Systems. - Rikio Maruta (IEEE Trans. Commun., 1980)

An LSI chip set for DSP hardware implementation. - Akira Kanemasa; Rikio Maruta; Kenji Nakayama; Y. Sakamura; S. Tanaka (ICASSP, 1981)

Design and Performance of a DSI Terminal for Domestic Applications. - Rikio Maruta; Atsushi Tomozawa; Takao Nishitani; Tomonori Okada; Ken'Ichi Nakano; Takashi Araseki; Mutsunari Tajima (IEEE Trans. Commun., 1981)

A 32 kb/s toll quality ADPCM codec using a single chip signal processor. - Takao Nishitani; Shinichi Aikoh; Takashi Araseki; Kazunori Ozawa; Rikio Maruta (ICASSP, 1982)

24- and 120-Channel Transmultiplexers Built with New Digital Signal Processing LSI's. - Rikio Maruta; Akira Kanemasa; Hisashi Sakaguchi; Masao Hibino; Kenji Nakayama (IEEE Trans. Commun., 1982)

An oversampling A-to-D converter structure for VLSI digital codec's. - Akira Yukawa; Rikio Maruta; Kenji Nakayama (ICASSP, 1985)

Synchronous Tandem Algorithm for 32-kbit/s ADPCM. - Masahiro Taka; Rikio Maruta; Alain Le Guyader (IEEE Trans. Commun., 1985)

DSP implementations of sophisticated speech codecs. - Masahiro Taka; Rikio Maruta; Shigeyuki Unagami (IEEE J. Sel. Areas Commun., 1988)

Unified OTP Cryptosystem with Authentication and Secrecy. - Osamu Atsumi; Shogo Hayashida; Rikio Maruta (SoMeT, 2006)

Transforming a Non-Software Company to a Software Company by Exploiting the LYEE Methodology. - Rikio Maruta; Noriko Taniguchi (SoMeT, 2006)

A Unique Trial of Developing Software for the Actual Application by an Engineer with Non-Software Background. - Shogo Hayashida; Noriko Taniguchi; Rikio Maruta (SoMeT, 2007)

Developing a Unique Collaborative System - "Optimization-Ware" Using a Novel Massive Data Retrieval/Management Approach. - Rikio Maruta; Shogo Hayashida; Noriko Taniguchi; Kohei Sugawara; M. Sengoku; W. Shoji (SoMeT, 2008)

Evaluating Data Handling Performance of ISSEI Data Management Method. - Shogo Hayashida; Noriko Taniguchi; Kohei Sugawara; Rikio Maruta; W. Shoji (SoMeT, 2009)

A New Windows Desktop Icon for Single Point-of-Control of the Application Window. - Kohei Sugawara; Rikio Maruta (SoMeT, 2009)

On More Efficient Searching Methods for a Corporate Knowledge Database. - Noriko Taniguchi; Shogo Hayashida; Kohei Sugawara; Rikio Maruta (SoMeT, 2009)

A novel intuitive GUI method for user-friendly operation. - Kohei Sugawara; Rikio Maruta (Knowl. Based Syst., 2009)

Using Software to Make Sales Force Performance More Dynamic. - Rikio Maruta (SoMeT, 2010)

Designing a system to care for employees working apart. - Shogo Hayashida; Yohei Ogawa; Rikio Maruta (SoMeT, 2011)

Transforming knowledge workers into innovation workers to improve corporate productivity. - Rikio Maruta (Knowl. Based Syst., 2012)

The creation and management of organizational knowledge. - Rikio Maruta (Knowl. Based Syst., 2014)