Simulation Research of Passive Ranging Method of High Speed Underwater Object
Feng Wang · Audio Engineering · 2011
Passive ranging of torpedo using Doppler method is studied in this paper.First,Doppler theory is introduced and a range estimation formula is deduced.Then,the calculation methods for the Doppler frequency of direct-arrival signal and surface-reflection signal by establishing an underwater object movement model are formularized in detail.Last,several simulation experiments of variation on the Doppler effects of direct-arrival signal and surface-reflection signal of typical movement,the variation of Doppler Frequency Differences(DFD) between direct-arrival signal and surface-reflection signal with different bearing angles and receiving array depths are carried out and the range estimation error varying with frequency estimation error is also studied.