A Novel Modulation Technique for Spectral Efficiency Enhancement of Ternary Precoded Continuous Phase Modulation (1076)

Based on an analysis of SOQPSK’s binary to ternary precoder rules and their effect on the signal’s spectrum, a new precoding technique is derived in this paper, to incorporate into the modulated signal more than one bit per symbol. The result is Constrained Ternary Precoded CPM (CTP-CPM), a novel modulation technique with a 25% increase in spectral efficiency compared to SOQPSK, usable for data rate enhancements or the reduction of the required radio frequency bandwidth.