SIGNALING WITH FREQUENCY-SHIFT-KEYED COSINE WAVES,

Abstract : A very efficient binary signaling technique (from the standpoint of bandwidth utilization) is described. The power density spectrum of the signal is derived and compared with that of sinusoidal diphase and rectangular diphase. A means for coding and decoding the signal is discussed. An experimental model operating at 16 kilobits per second was constructed. It was tested over the special service channel of the Frequency Division Multiplexing Equipment AN/TCC-7. (Author)