Digital frequency modulation as a technique for improving telemetry sampling bandwidth utilization
G. E. Heyliger · 1970
A hybrid of Time Division Multiplexing (TDM) and Frequency Division Multiplexing (FDM), both well-established in theory and practice is described herein. While related to TDM and FDM, the particular combinations of techniques and implementations are novel and, indeed, provide a third alternative for signal multiplexing applications. The essence of the idea is to perform all band translation and filtering via numerical or digital techniques.