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Transmission Media Lab
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The lab uses mathematics and circuits to smartly extract communication signals.
AboutAbout the lab
Making communication smarter through signal processing.
The Transmission Media Lab (Hayashi Lab) is a lab in the Communication and Information Systems Course at the Graduate School of Informatics, which started when Prof. Hayashi joined as Professor in April 2026.
The lab's research centers on signal processing for communication and sensing.
Key terms
- Sparse
- A property of data in which most values are zero and only a few values are nonzero
- Proximal operator
- A basic computational operation used repeatedly in optimization, such as when recovering sparse signals
- Space-division multiplexing (SDM)
- A technology that sends many signals simultaneously by using multiple paths within a single optical fiber
NewsLab news
A paper by Prof. Hayashi and colleagues was published in IEICE Transactions on Fundamentals of Electronics, Communic…
A paper by Prof. Hayashi and colleagues was published in Optics Express
ResearchResearch themes
In Prof. Hayashi's recent papers, the lab works on sparse signal recovery using approximate computation in circuits, adaptive signal processing for optical fiber communication, and related topics.
*Illustrative imageRecovering sparse signals with circuits
Prof. Hayashi and colleagues study methods that use analog or optoelectronic circuits to approximately perform the computation (the proximal operator) needed to recover sparse signals, such as binary vectors.
*Illustrative imageSignal processing for optical fiber communication
Prof. Hayashi also studies the performance of adaptive MIMO filters and adaptive interference cancelers for space-division multiplexed optical fiber transmission.
MembersFaculty
The members of the Transmission Media Lab consist of faculty, doctoral students, master's students, and fourth-year undergraduate students.
- ProfessorKazunori Hayashi
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Fiber optic cable installation (rubin- )” Rubin Observatory/NSF/AURA / CC BY 4.0 (cropped)
- Recovering sparse signals with circuits: “Effects breadboarding - Joe Davissons Easy Drive into my Green Ringer - Switching stuff in and out easily ( by germanium)” germanium from Eichwalde, Germany / CC BY 2.0 (cropped)
- Signal processing for optical fiber communication: “Fiber optic illuminated” Hustvedt / CC BY-SA 3.0 (cropped)
- Related lab (Advanced Electrical Machinery Engineering Lab): “Blaupunkt CR-4500 - drive unit - tape Drive Capstan, brushless DC electric motor-9992” Raimond Spekking / CC BY-SA 4.0 (cropped)
- Related lab (Electromagnetic Energy Engineering Lab): “Cut-away version of an electric motor (1)” S.J. de Waard / CC BY 2.5 (cropped)
- Related lab (Language Media Lab): “T-SNE visualisation of word embeddings generated using 19th century literature” Siobhán Grayson / CC BY-SA 4.0 (cropped)
- Related lab (Microwave Energy Transmission Lab): “Solar power satellite sandwich or abascus concept” NASA / Public domain (cropped)
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