Wave propagation and signal processing, applied to wireless communications, radar, sonar, medical ultrasonics, geophysics.Wireless system researcher leading radio propagation work at Bell Labs, including multi-antenna MIMO measurements, models, signal processing for channel estimation, optimal antenna array design, system performance assessment and interference mitigation.First demonstrated MIMO capacities in extensive measurement and modeling campaign.Advanced wireless communications system design and RF planning, OFDM, link simulation, terrestrial and satellite communicationCommercial and tactical communicationsInvented and patented "channel slowing" technique to allow communication in high-Doppler spread channels.Deterministic and statistical modeling of wave propagation physics in radio and acoustic applications.Specialties: * Physics-based wave propagation modeling and measurement, electromagnetics and underwater acoustics* Stochastic processes and statistical data analysis* Partial differential equations* Engineering expertise in wireless link and system performance assessment, signal processing algorithms, RF planning, link budget, interference mitigation