George W. Hughes."May 1, 1961." "Based on a thesis submitted to the Department of Electrical Engineering, M. I. T. ... 1959, in partial fulfillment of the requirements for the degree of Doctor of Science." "May 1, 1961."Includes bibliography.Army Signal Corps Contract DA 36-039-sc-78018. Dept. of the Army Task 3-99-20-001 and Project 3-99-00-000.