Integral detecting of low observable target by stepped frequency signals

An equivalent wide pulse technique with range resolution capability is proposed to overcome the effect of range migration on low observable target detection using long term coherent integration. This method makes use of both simultaneously and sequentially stepped frequency signals to synthesize a narrow pulse in the receiver while carrying out coherent integration against each individual component, an equivalent working mode by a wide emitting pulse as well as a narrow receiving pulse. The advantages over those available methods is it achieves a long integration time while having range and velocity resolution capabilities