Directional Method Research Of Radio Fuze Based On Cylindrical Conformal Array

Anti-aircraft missile aimed warhead can greatly improve the end of the air defense missile damage efficiency of aimed warhead and the most damage efficiency of the implementation,must take directional fuze target miss azimuth accurate identification and accurate directional blasting control as the prerequisite.Paper with projectile conformal cylindrical conformal array,with the method of array signal processing for detonating azimuth,have higher orientation precision,has important theory significance and the military application value.Firstly,a block diagram of fuze system based on cylindrical conformal array is proposed,based on the actual missile’s size and the level of transmitter.A uniform cylindrical conformal array is designed,with twelve elements distributed by half wavelength interval,and it can omnidirectionally receive signals in a horizontal direction.In this paper,the pulse doppler fuze signal model based on cylindrical common array is derived.Considering the "shading effect" in the actual situation,this paper puts forward the method of identifying the effective receiving subarray by threshold discrimination in order to obtain the real effective receiving array signal.In this paper,we discuss the popular characteristics of the effective receiving snapshot and lay a foundation for the subsequent array signal processing.Secondly,we use the blind beamforming algorithm based on fourth-order cumulant to DOA estimation of cylindrical conformal array fuze,and discuss the snapshot number,signal-to-noise ratio on the estimation precision,the simulation shows that in the case of a small snapshot number,the estimation precision is low.In addition,by means of solving the transformation matrix will convert actually receiving array converted into a virtual line array,virtual linear array is omnidirectional and relatively simple,hence array interpolation is proposed based on second order nested to simplify the cylindrical conformal array DOA estimation into second order nested linear array DOA estimation.For the second order nested linear array,we put forward two searching free algorithm,namely the covariance matrix expansion and the improved canonical polyadic decomposition,to realize radio fuze orientation.