  Continuous phase modulation (CPM) with 1-bit quantization at the receiver is
promising in terms of energy and spectral efficiency. In this study, CPM
waveforms with symbol durations significantly shorter than the inverse of the
signal bandwidth are proposed, termed faster-than-Nyquist CPM. This
configuration provides a better steering of zero-crossings as compared to
conventional CPM. Numerical results confirm a superior performance in terms of
BER in comparison with state-of-the-art methods, while having the same spectral
efficiency and a lower oversampling factor. Moreover, the new waveform can be
detected with low-complexity, which yields almost the same performance as using
the BCJR algorithm.
