Xampling: Analog to Digital at SubNyquist Rates
Based on the papers:

M.
Mishali and Y. C. Eldar, "From
Theory to Practice: SubNyquist sampling of Sparse
Wideband Analog Signals", IEEE Journal of Selected Topics
on Signal Processing, vol. 4, no. 2, pp. 375391, April 2010. (Talk).

M.
Mishali, Y. C. Eldar and A. Elron, " Xampling: Signal Acquisition and Processing in Union of Subspaces", CCIT Report #747 Oct09, EE Pub No. 1704, EE Dept., Technion  Israel Institute of Technology; [Online] arXiv
0911.0519, Oct. 2009.
 M. Mishali, Y. C. Eldar, O. Dounaevsky and E. Shoshan, "Xampling: Analog to Digital at SubNyquist Rates", IET Circuits, Devices & Systems, vol. 5, no. 1, pp. 8–20, Jan. 2011.

The circuit work was presented in SiPS 2010, SanFrancisco, CA:
M. Mishali, Y. C. Eldar, O. Dounaevsky and E. Shoshan "SubNyquist Acquisition Hardware for Wideband Communication", IEEE Workshop on Signal Processing Systems (SiPS), pp. 156 161, October 2010.  The poster can be downloaded from here.
 Additional material is found on the software page.