SSB modulator for data signals using binary transversal filters

The design of a SSB modulator for binary data signals using binary transversal filters is described, which gives a transmitter output IN PU E2sRO^ ORDER -0 spectrum which approximates an optimum spectrum for a high-quality transmission channel. The modulator uses the phase-shift method of SSB generation and the arbitrary phase of the transmitted spectrum is chosen to give an efficient modulator realization which overcomes a major drawback of this method of SSB modulation. Both minimum mean-square error and min-max frequency domain designs are considered and a comparison shows the desirability of the former approximation criterion. An implementation of such a modulator is described.