Contributions To Communications Technologies
Sekimoto, in addition the accomplishments of his corporate career, made significant contributions to the advancement of communications technologies over more than 50 years. During his 17 years at NEC's Central Research Laboratories he designed early pulse-code modulation equipment down to the coding and decoding circuitry. During his two years at COMSAT, he set up a communications processing laboratory and oversaw or helped oversee numerous projects covering voice-, data-, and video-processing technologies, including the development of single-channel-per-carrier pulse-code-modulation multiple-access demand-assignment equipment and assigned it the acronym SPADE because "the ace of the spades in card games was regarded as almighty". Later, in the early 1970s, Intelsat commercialized SPADE technology, which is credited with allowing developing countries to join global networks by making satellite communications affordable to them. A time-division multiple access (TDMA) system and an automatic routing system Sekimoto developed were not only hugely significant for satellite communications, but also became indispensable elements of cellular mobile communications thirty years on. Seminal in their day, many technologies and applications Sekimoto worked on at NEC and COMSAT are integral to modern telecommunications systems, and they helped lay the groundwork for the global networks that many societies now depend on.
Sekimoto has also authored numerous works, both technical publications and books written for a wider audience, and he has 35 Japanese and five non-Japanese patents to his credit.
Read more about this topic: Tadahiro Sekimoto
Famous quotes containing the words contributions to:
“The vast material displacements the machine has made in our physical environment are perhaps in the long run less important than its spiritual contributions to our culture.”
—Lewis Mumford (1895–1990)