| 摘要 |
To reflect advantages of a constant phase modulation waveform, the invention provides a pulse amplitude modulated PAM waveform that is a superposition of Q<SUB>0</SUB><=2<SUP>L-1 </SUP>PAM component pulses in each symbol interval such that a significant portion of signal energy over each symbol interval is within the Q<SUB>0 </SUB>PAM component pulses. The present invention distributes most signal energy in one pulse and progressively lower energies in the remaining Q<SUB>0</SUB>-1 pulses of a symbol interval. The Laurent Decomposition is a special case of the present invention, but the present invention exhibits the energy distribution of the Laurent Decomposition in non-binary CPM waveforms and in multi-h (binary and non-binary) CPM waveforms, where h is a modulating index. All energy is distributed among only Q=2<SUP>L-1 </SUP>pulses in each symbol interval, though only Q<SUB>0</SUB><Q pulses may in fact be transmitted in certain embodiments. A method, transmitter, receiver, and computer program are disclosed. Embodiments may exactly duplicate a CPM waveform, or approximate a CPM waveform.
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