Analysis of Narrow Pulse and Ultra-wideband Signals Characteristic and Its Short-range Application

General torpedo homing signals are usually modulating wideband signals, which have some disadvantages in short-range detection to reduce the accuracy when a torpedo hits target. In order to make up the shortcomings, this paper analyses the characteristic of a narrow pulse and ultra-wideband homing signals, and compares it with linear frequency modulation(LFM) signals in resolution rate, measuring precision, Doppler velocity tolerance and so on. The results indicate that the narrow pulse and ultra-wideband signal gains higher resolution of distance, stronger ability of target identification and smaller homing blind area. Based on these features, a torpedo can continually track and accurately attack target on its terminal trajectory when the narrow and ultra-wideband signals is used in short-range detection. And at very short distance, the echo can also be used as fuze information to implement the integrated homing fuze design.