Double sideband pulse radar

摘要

A pulse radar system transmits a pulse containing an upper and a lower sideband frequency signal. The upper and lower sideband signals are formed by a stable local oscillator signal and a coherent oscillator signal which are mixed in a mixer. The frequency separation between the upper and lower sidebands is sufficient to cause fluctuations in the desired target radar cross section to be statistically independent with respect to the upper and lower sideband frequency components in the transmitted pulse. Target reflected pulses are separately processed for each transmitted frequency component. The probability of detection is improved by mathematically combining the separately-processed output signals of each frequency component.