EE Seminar: Sub-Nyquist Sampling: Bounds, Algorithms and Hardware

~~(The talk will be given in English)

Speaker:  Prof. Yonina Eldar
                      EE, Technion

Monday, November 16th, 2015
15:00 - 16:00
Room 011, Kitot Bldg., Faculty of Engineering
Sub-Nyquist Sampling: Bounds, Algorithms and Hardware
Abstract
The famous Shannon-Nyquist theorem has become a landmark in the development of digital signal processing. However, in many modern applications, the signal bandwidths have increased tremendously, while the acquisition capabilities have not scaled sufficiently fast. Consequently, conversion to digital has become a serious bottleneck. Furthermore, the resulting high rate digital data requires storage, communication and processing at very high rates which is computationally expensive and requires large amounts of power.

In this talk, we present a framework for sampling and processing a wide class of wideband analog signals at rates far below Nyquist. We refer to this methodology as Xampling: A combination of compression and sampling, performed simultaneously. Using the Cramer-Rao bound we develop a generic low-rate sampling architecture that is optimal in a mean-squared error sense, and can be applied to a wide variety of wideband inputs. The resulting system can be readily implemented in hardware, and is easily modified to incorporate correlations between signals. We consider application of these ideas to a variety of problems including low rate ultrasound imaging, radar detection, ultra wideband communication, and cognitive radio, and show several demos of real-time sub-Nyquist prototypes.