A Proposed Method of FSK Generation and Demodulation for the DREO Radio Test Bed

A Radio Test Bed RTB is currently being developed for DREO under contract. The test bed is to serve as a powerful general purpose laboratory instrument for the generation and demodulation of non exotic communications signals found in the tactical environment. The system will interface with the DREO Communications Jamming Simulator to allowing jamming studies to be performed on various communications signals. The system will have the capability of generating and demodulating the following signals AM, FM, USB, and LSB. A method has been devised to incorporate the generation and demodulation of data modulated Frequency Shift Keyed FSK signals into the FTB. The modulation technique involves using a baseband data signal to directly frequency modulate an RF carrier. Demodulation is achieved by using the FM demodulator of the RTB. Some signal conditioning is required, but the FSK generation and demodulation scheme has the capability of being easily and inexpensively implemented in the RTB while it is still under construction. The proposed method has been tested at DREO excellent results. Canada. rh