Yoshihisa Okumura
Yoshihisa Okumura ( Japanese 奥 村 善 久 , Okumura Yoshihisa ; * 1926 in Ishikawa Prefecture ) is a Japanese engineer who is known for fundamental work on cellular communications .
Okumura studied electrical engineering from 1944 to 1947 at the Kanazawa Institute of Technology (KIT, English for Kanazawa Kōgyō Daigaku , "Kanazawa Technical University"). From 1950 he worked for the Japanese telephone company NTT ( Nippon Telegraph and Telephone ). In 1970 he became head of cellular research at NTT's Electrical Communication Laboratory (ECL). In 1975 he went to Toshiba . In 1979 he became a professor at the Kanazawa Institute of Technology, where he retired in 2000.
Okumura carried out careful measurements of the reception conditions (in test cars) in a wide variety of terrain situations and distances (1 to 100 km) and at different antenna heights and frequencies in the range 150 to 1920 MHz. The data were published in 1968 and formed an important basis for the mobile radio technologies that were then being developed. Results of the report were later known as Okumura formulas, Okumura model, and Okumura curves. The 800 MHz band was chosen primarily because of his research.
In 2013 he received the Charles Stark Draper Prize . He is a member of the National Academy of Engineering .
Web links
Individual evidence
- ↑ Field strength and its variability in VHF and UHF land-mobile radio service , Electrical Communication Laboratory, Volume 16, No. 9/10, 1968
| personal data | |
|---|---|
| SURNAME | Okumura, Yoshihisa |
| ALTERNATIVE NAMES | 奥 村 善 久 (Japanese) |
| BRIEF DESCRIPTION | Japanese engineer and cellular pioneer |
| DATE OF BIRTH | 1926 |
| PLACE OF BIRTH | Ishikawa Prefecture |