A Bipolar Signal Waveform Generator

Bipolar signal waveforms for digital communication are normally accomplished by coding the message sequence first and then pulse shaping the bipolar signal. The coding is relatively simple to mechanize; the pulse shaping may present some difficulty and approximation techniques may have to be used. A hybrid digital-analog mechanization of a bipolar signal waveform generator in which the bipolar encoding and pulse-shaping operations are combined is described.