[1] Univ Texas Austin, Dept Elect & Comp Engn, Austin, TX 78712 USA
[2] Johns Hopkins Univ, Dept Elect & Comp Engn, Baltimore, MD 21218 USA
[3] Oklahoma State Univ, Dept Ind Engn & Management, Stillwater, OK 70047 USA
[4] Univ Texas Southwestern Med Ctr Dallas, Div Med Phys & Engn, Dallas, TX 75390 USA
[5] Kyushu Inst Technol, Dept Mech & Control Engn, Kitakyushu, Fukuoka 8048550, Japan
[6] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA