Sidelobe suppression versus phase error characteristics of multistage modulation scanning sonar systems

Abstract

The sidelobe level sensitivity of multistage modulation scanning sonar systems to internal electronic phase errors is examined by means of a "scanning function" approach and also by a hardware oriented analysis of a particular sonar system. It is shown that the later internal stages of such modulation scanning systems are the most sensitive to phase error. A general approach to calculating scanning sidelobe levels with phase error present is discussed.