Continuous waveforms from a binary modulator

This paper presents a practicable scheme for building high frequency direct digitizing transmitters. The transmitter uses a simple look up table approach to generate a binary stream which is then merely filtered to produce the radiated signal. Thus, there is no need for precise digital to analog converters. A new constrained list decoding algorithm operating over the real alphabet produces the data in the look up table. The transmitter can be a modulator only or a combined encoder and modulator. The paper concludes with spectra and error vector magnitude measurements for GMSK with frequencies over 10 Ghz