Performance vs. Spectral Properties For Single-Sideband Continuous Phase Modulation

Abstract

This study reports on a single side band spectrum directly generated by a continuous phase modulation (CPM) signal. This signal is analyzed in terms of modulation indices, pulse lengths, and pulse widths, all of which affect error probabilities, bandwidths, and SSB property. The error probability performance is based on an approximation of the minimum Euclidean distance. A numerical power spectral density calculation for this particular SSB modulation in terms of modulation index is presented. Reasonable tradeoffs in designing modulation schemes have been defined using multi-objective optimization to ensure sizable improvements in bit error rate (BER) and spectral efficiencies, without losing the property of being a SSB signal. Performance comparisons are made with known CPM schemes, e.g., Gaussian Minimum Shift Keying (GMSK) and Raised Cosine based CPM (RC).