0 0 1 , ▁He ath ▁was ▁a ▁Senior ▁Member ▁of ▁the ▁Techn ical ▁Staff ▁and , ▁later , ▁Senior ▁Cons ult ant ▁at ▁I osp an ▁W ire less ▁Inc , ▁San ▁Jose , ▁CA . ▁ ▁At ▁I osp an ▁he ▁was ▁part ▁of ▁a ▁team ▁that ▁designed ▁and ▁implemented ▁the ▁physical ▁and ▁link ▁layers ▁of ▁the ▁first ▁commercial ▁M I MO - OF DM ▁communication ▁system . ▁Since ▁January ▁ 2 0 0 2 , ▁he ▁has ▁been ▁with ▁the ▁Department ▁of ▁Elect rical ▁and ▁Computer ▁Engineering ▁at ▁The ▁University ▁of ▁Texas ▁at ▁Austin ▁where ▁he ▁is ▁a ▁C ull en ▁Trust ▁for ▁High er ▁Education ▁End owed ▁Professor , ▁and ▁is ▁a ▁Member ▁of ▁the ▁W ire less ▁Network ing ▁and ▁Communic ations ▁Group . ▁He ▁is ▁also ▁President ▁and ▁CE O ▁of ▁M I MO ▁W ire less ▁Inc . ▁and ▁Chief ▁In nov ation ▁Officer ▁at ▁K uma ▁Sign als ▁L LC . ▁He ▁was ▁the ▁Director ▁of ▁the ▁W ire less ▁Network ing ▁and ▁Communic ations ▁Group ▁from ▁ 2 0 1 2 - 2 0 1 4 , ▁where ▁he ▁o vers aw ▁an ▁expansion ▁of ▁the ▁center ▁in ▁terms ▁of ▁fac ulty ▁and ▁students , ▁and ▁an ▁increase ▁in ▁research ▁exp end it ures ▁to ▁more ▁than ▁$ 5 M ▁per ▁year . ▁He ▁is ▁a ▁co - author ▁on ▁more ▁than ▁ 4 5 0 ▁ref ere ed ▁conference ▁and ▁journal ▁publications . ▁He ▁is ▁also ▁a ▁co - in vent or ▁of