Tsutomu Ishikawa

According to our database, Tsutomu Ishikawa authored at least 21 papers between 1986 and 2025.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2025

Downtilt Optimization of Array Antennas Based on Envelope Radiation Patterns for HAPS Service Links With Massive MIMO.

Koichi Maki, Koji Tashiro, Tsutomu Ishikawa, Kenji Hoshino

IEEE Access, 2025

2024

Implementation and Experimental Evaluation of Nullforming-Based Interference Reduction Scheme for HAPS-Terrestrial Spectrum Sharing.

Koji Tashiro, Tsutomu Ishikawa, Kenji Hoshino, Atsushi Nagate

Proceedings of the 100th IEEE Vehicular Technology Conference, 2024

Coordinated Nullforming with Limited Control Parameters for Spectrum Sharing Between High-Altitude Platforms and Terrestrial Networks.

Tsutomu Ishikawa, Koji Tashiro, Kenji Hoshino, Atsushi Nagate

Proceedings of the 99th IEEE Vehicular Technology Conference, 2024

2023

Spectrum Sharing Between High-Altitude Platforms and Terrestrial Networks Using Interference Coordination by Null Sweeping.

Tsutomu Ishikawa, Koji Tashiro, Kenji Hoshino, Atsushi Nagate

Proceedings of the 98th IEEE Vehicular Technology Conference, 2023

Low Insertion Loss 128-Gbaud HB-CDM with 3D-Printed Spot Size Converter Integrated InP-based Modulator.

Yasutaka Mizuno, Munetaka Kurokawa, Naoki Itabashi, Taichi Misawa, Masaru Takechi, Hiroshi Uemura, Hajime Tanaka, Tsutomu Ishikawa, Tomoya Saeki, Keiji Tanaka, Takatoshi Kato, Manabu Shiozaki, Katsumi Uesaka

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2023

2021

High Optical Output Power and High-responsivity IC-TROSA for 800 Gbps applications.

Munetaka Kurokawa, Kenichi Nakayama, Masaru Takechi, Yasutaka Mizuno, Taichi Misawa, Eiichi Banno, Hiroshi Uemura, Yoshiyuki Sugimoto, Seiji Kumagai, Takuya Okimoto, Naoya Kono, Tsutomu Ishikawa, Hiroshi Hara, Takatoshi Kato, Keiji Tanaka, Mitsuru Ekawa, Katsumi Uesaka

Proceedings of the European Conference on Optical Communication, 2021

2020

Highly Reliable and Compact InP-Based In-Phase and Quadrature Modulators for Over 400 Gbit/s Coherent Transmission Systems.

Hajime Tanaka, Tsutomu Ishikawa, Takashi Kitamura, Masataka Watanabe, Ryuji Yamabi, Ryo Yamaguchi, Naoya Kono, Takehiko Kikuchi, Morihiro Seki, Tomokazu Katsuyama, Mitsuru Ekawa, Hajime Shoji

IEICE Trans. Electron., 2020

2019

Study on the optical damage mechanism of InP IQ modulators using a step stress test.

Hajime Tanaka, Tsutomu Ishikawa, Mitsuru Ekawa

Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

2006

Inference Scheme for Order-Sorted Logic Using Noun Phrases with Variables as Sorts.

Masaki Kitano, Seikoh Nishita, Tsutomu Ishikawa

Proceedings of the MICAI 2006: Advances in Artificial Intelligence, 2006

2002

A mechanism for inferring approximate solutions under incomplete knowledge based on rule similarity.

Viet Ha Nguyen, Tsutomu Ishikawa, Akinori Abe

Syst. Comput. Jpn., 2002

1997

Stock Price Prediction Using Prior Knowledge and Neural Networks.

Kazuhiro Kohara, Tsutomu Ishikawa, Yoshimi Fukuhara, Yukihiro Nakamura

Intell. Syst. Account. Finance Manag., 1997

1995

Hypercube Multiprocessors with Bus Connections for Improving Communication Performance.

Tsutomu Ishikawa

IEEE Trans. Computers, 1995

Totally defect-tolerant arrays capable of quick broadcasting.

Nobuo Tsuda, Tsutomu Ishikawa, Yukihiro Nakamura

Proceedings of the 1995 IEEE International Symposium on Defect and Fault Tolerance in VLSI and Nanotechnology Systems, 1995

Viewpoint-Based Measurement of Semantic Similarity between Words.

Kaname Kasahara, Kazumitsu Matsuzawa, Tsutomu Ishikawa, Tsukasa Kawaoka

Proceedings of the Learning from Data, 1995

1994

Bypass Strategy in Hypercube Multiprocessors by adding Bus Connections.

Tsutomu Ishikawa

Proceedings of the PARLE '94: Parallel Architectures and Languages Europe, 1994

1993

Optimal parallel back-propagation schemes for mesh-connected and bus-connected multiprocessors.

Takashi Yukawa, Tsutomu Ishikawa

Proceedings of International Conference on Neural Networks (ICNN'88), San Francisco, CA, USA, March 28, 1993

1991

Hypercube Architecture with Bus Connections for Improving Communication Efficiency.

Tsutomu Ishikawa

Syst. Comput. Jpn., 1991

1990

Universal Fault-Tolerant Hypercube Architecture without a Switching Mechanism.

Tsutomu Ishikawa

Syst. Comput. Jpn., 1990

Presto: A Bus-Connected Multiprocessor for a Rete-Based Production System.

Hideo Kikuchi, Takashi Yukawa, Kazumitsu Matsuzawa, Tsutomu Ishikawa

Proceedings of the CONPAR 90, 1990

1986

Hierarchical Array Processor (HAP) Featuring High Reliability and High System Performance.

Tsutomu Ishikawa, Shigeharu Momoi, Shigeo Shimada, Yoshio Ogawa

Proceedings of the International Conference on Parallel Processing, 1986

Hierarchical Array Processor System (HAP).

Shigeharu Momoi, Shigeo Shimada, Masamitsu Kobayashi, Tsutomu Ishikawa

Proceedings of the CONPAR 86: Conference on Algorithms and Hardware for Parallel Processing, 1986