[1]Department of Electrical Engineering and Computer Science, the Catholic University of America, Washington, DC, USA;
[2]Oualcomm Inc., San Diego, CA, USA;
[3]Pattern Insight Inc., San Diego, CA, USA;
[4]Uniformed Services University of the Health Sciences, Bethesda, MD, USA;
[5]Department of Computer Science, the George Washington University, Washington, DC, USA;
