Optimization some characteristics of continuous phase spread spectrum signal

Continuous phase spread spectrum signal optimization problem is considered. The key optimization parameter in the paper is number of information symbol intervals before merging phase trajectories for different information sequences. This optimization is good at least for two reasons: 1) it defines the information symbol depth at which the minimum square Euclidean distance can reach upper bound; 2) it defines Viterbi algorithm depth analysis in a receiver. The case of rational modulation index continuous phase spread spectrum signal is separately considered. Optimization results for some simple signal formats were found.