利用船舶噪声线谱的TDOA和FDOA定位方法研究OACSTPCD

Ship radiated noise is the main source of arine environmental noise.Due to the influence of various me-chanical operation and water flow,ship radiated noise is composed of a variety of noise sources.The underwater ra-diated noise of ships contains abundant characteristic information,which is an important basis for tracking and posi-tioning.Aiming at the inaccurate positioning problem caused by the introduction of redundant variables in the first stage of two-stage weighted least squares(TSWLS),this paper proposes a joint positioning method of underwater time difference of arrival(TDOA)and frequency difference of arrival(FDOA)using invasive weed optimization al-gorithm(IWO)and weighted least squares(WLS),taking the line spectrum of ship radiated noise as the signal source.The simulation results show that the velocity and position deviation and root mean square error of the pro-posed method are lower than those of the traditional two-stage weighted least squares(TSWLS)and iterative weighted least squares(ICWLS)in the case of small noise with noise variance of 40 dB to 0 dB.Therefore,it is of great significance for military and security to use ship radiated noise line spectrum to locate it in shallow water envi-ronment.