A class of multifrequency signals with low sidelobes in central zone of autocorrelation function

This paper is intended to introduce a class of signals based on frequency coding sequences that may be constructed by means of perfect difference sets. A regular algorithm for the construction of the frequency coding sequences is described. These sequences give rise to multifrequency signals having considerably lower sidelobes in the region surrounding the main lobe of the time autocorrelation function against those exhibited by conventional frequency-hopped signals. In addition, the signals exhibit a thumbtack ambiguity function with relatively low sidelobes over a wide region of the time-frequency plane.