Monday, May 21
8:00 am - 9:10 am
We investigate how to realize diversity gains across line of sight and rich scattering environments by coupling channel coding to spatial and polarization degrees of freedom. This talk will focus on the simple case of two dually polarized transmit antennas and a dually polarized receive antenna and on the simple question of when to code across antennas for a given polarization, and when to code across polarizations at a given antenna. Our codes will be built out of Alamouti components and the different ways of coupling channel coding to spatial and polarization degrees of freedom will lead to different distributions of the "angle"
between Alamouti channels. These distributions will turn out to determine the stability of the coding scheme with respect to the relative phase between transmit antennas.
This is joint work with Stephen Howard and Songsri Sirianunpiboon.
Dr. Robert Calderbank is a Professor of Electrical Engineering and Mathematics at Princeton University where he directs the Program in Applied and Computational Mathematics. He joined Princeton from AT&T where he was Vice President for Research and responsible for the first Research Lab in the world where the primary focus is data. Inventions by Dr. Calderbank in his career at Bell Labs and AT&T have transformed communications practice in voiceband modems, advanced read channels for magnetic recording, and wireless systems. He was elected to the National Academy of Engineering in 2005.