
In recent years, wireless communication has become very familiar, as exemplified by the rapid spread of mobile phones. However, because the available frequencies are limited, the transmission speed of mobile phones is lower than that of fiberoptic communication, audio quality fluctuates, and there is a risk of eavesdropping. To solve these problems, the Ohtsuki Group is developing communication technologies based on information theory and signal processing. Q.For example, one topic in our recent research is multidimensional signal processing for communications and security. Until now, signal processing has often been done in time or frequency domains, but were extending it to include spatial domain as well. In other words, we can do signal processing with respect to time, or space and frequency, or time and space, or time, space, and frequency. For example, when you're using a mobile phone, until now, sending or receiving a large data file has taken a very long time. But if you use this kind of technology, we can realize high-speed wireless communications like optical communications with mobile phones, high-quality transmission is possible, so DVDs or movies can be downloaded very quickly. Alternatively, by giving a network some capabilities of mobile phones, a secure mobile phone system can be created. We expect to be able to do a variety of things. They are also looking at positioning systems that could replace GPS. They are researching and developing positioning <b>...</b>
Keio
University
Tomoaki
Ohtsuki
Group
Security
system
position
detection
wireless
communication
engineering
computer
science
japan
tokyo
network
signal
processing
electrical
keiouniversity