PhD Jian Chen
CONGRATULATIONS ON YOUR GRADUATION
Published Mar 14, 2013
Jian Chen from China came to School of Information and Communication Technology for PHD studies after master studies at Fudan university in Shanghai. Now he has defended his PhD thesis "Low Noise Oscillator in ADPLL toward Direct-to-RF All-digital PolarTransmitter" and is excited to make his research useful in the industry.
Where are you from and where did you study before coming to School of Information- and Communication Technology?
– I am from the Zhejiang province in China. It is located in the south-east part of the country, with a very beautiful landscape. I did my master study at Fudan university, Shanghai, China, before I come to KTH and School of ICT in 2006.
What is your topic and why did you choose it?
– My topic covers low noise oscillator, all-digital PLL and fully integrated transmitter for radio frequency (RF) applications. I am also interested in low power design for biomedical applications. It is a quite interesting topic for me and I believe it is a promising technology which will be widely applied in real products.
Describe your topic in short
– Radio Frequency Transmitters are used to send information to others, for example when you use your cell phone to call someone, send SMS, picture or video, a RF transmitter is needed. The oscillator and PLL are key building blocks for a transmitter. So my work is first to design the key building blocks and then fulfill the whole system.
Tell us something about your results
– I have several chips in my hand that I designed during my PhD studies which demonstrate decent performance. I have published 20 papers, including 5 journal papers regarding to my PhD work.
What will the future bring for your research topic?
– In my opinion all-digital RF Transmitters will be the future direction with CMOS process down-scaling, as they will benefit a lot such as using DSP, good matching, performance improvement with scaling, design automation and so on. One step to further my work is to target at wideband or high frequency (> 10 GHz) applications, as the customers are always demanding higher date rate applications such watching HD movie in wireless, downloading several Giga bytes files in some seconds.
How do your future plans look like?
– I am working in the industry in Sweden now. I am trying my best to apply my research results in commercial products such as all-digital PLLs and all-digital transmitters. It will be very exciting if my research can be useful when developing commercial products.