Kaixo,
Datorren asteartean Zurich-eko ETHZ institutuko ikertzaile den Christoph Studer doktorearen hitzaldia izango dugu Mondragon Unibertsitateako Goi Eskola Politeknikoan. Hona xehetasunak, (ingelesez):
Titulua: “Multi-antenna Communication and the Intricacies of RF Impairments”
Gela: 11118. 11. eraikina, Elektronika eta Sistema Txertatuen Zentroa, Mondragon Goi Eskola Politeknikoa
Data: Urtarrilak 25, asteartea
Ordua: 09:30
Iraupena: Ordu bat (galderak eta eztabaida barne)
Laburpena:
Multiple-input multiple-output (MIMO) technology is widely recognized as a quantum-leap in wireless communication systems. In essence, the use of multiple antennas at both ends of the wireless link allows to transfer multiple data streams concurrently and within the same frequency band, eventually leading to a dramatic increase in terms of spectral efficiency and quality-of-service. Unfortunately, leveraging the gains of MIMO requires more complicated communication systems which are difficult to implement in hardware even in deep-submicron CMOS technologies. A particularly complex part of a MIMO transceiver is the detector which separates the spatially multiplexed data streams. In general, more complex algorithms offer better performance, but straightforward implementations are usually prohibitively complex.
In the first part of this talk, we focus on the MIMO detection problem. In particular, we explain how algorithm optimization allow for the implementation of soft-output MIMO receivers with close-to-optimum performance at a complexity that is surprisingly low. Based on these encouraging results, we then continue with a study of the performance of MIMO detection under real-world conditions where the signal is distorted in the radio frequency (RF) part of transmitter. Surprisingly, we shall see that even moderate levels of distortion may have a detrimental impact on MIMO communication. More precisely, advanced MIMO detection algorithms loose their performance advantage in the presence of such distortions. Luckily, we shall also see that this performance loss can be mitigated partially with only a small amount of additional computational complexity.
Hizlariaren (Christoph Studer) biografia:
Christoph Studer was born in Solothurn, Switzerland in 1979. He received the M.S. and Dr. sc. techn. degrees in electrical engineering from ETH Zurich, Switzerland, in 2005 and 2009, respectively.
In 2005, he was a Visiting Researcher with the Smart Antennas Research Group, Information Systems Laboratory, Stanford University, Stanford, CA, USA. From 2006 to 2009, he was a Research Assistant with the Integrated Systems Laboratory (IIS) at ETH Zurich. In 2008, he was a consultant for Celestrius, an ETH-spinoff specialized in the field of MIMO wireless communication. Since 2009, he has been a postdoctoral researcher in the Communication Technology Laboratory at ETH Zurich. His research interests include signal processing and the design of VLSI circuits and systems.
Dr. Studer was the recipient of an ETH Medal in 2005 and in 2010 for his M.S. Thesis and PhD Thesis, respectively. He has won the Student Paper Contest of the 2007 Asilomar Conference on Signals, Systems, and Computers and received a best paper award at the 2008 IEEE International Symposium on Circuits and Systems (ISCAS). His work (jointly with Mr. Fateh and Dr. Seethaler) on an iterative
MIMO decoding algorithm and VLSI implementation was awarded with the Swisscom Innovations Award 2010.