Research On Wireless Transmission Technology Of Test Bomb For Multimode Detection

Aiming at the problem that the stealth performance of ground armored targets needs to be reflected in real time,combining with the characteristics of large amount of real-time detection data and complex background environment of terminal sensitive projectiles based on composite detection,this paper builds a set of wireless transmission system to send real-time detection data of terminal sensitive missiles based on composite detection back to ground monitoring equipment.The research work in this paper provides technical support for obtaining visual reference for the stealth performance of armored targets.First of all,the input noise component of the detector signal is studied,based on the analysis of the signal after the time-frequency characteristics of the digital FIR filter design,and according to the characteristics of the plays on hardware implementation,the filter coefficient quantization method based on filter gain and distributed filter structure,improves the signal-to-noise ratio of the input signal detector and the speed of hardware.Secondly,the characteristics of the signal decomposed by wavelet transform are analyzed,and the signal is divided into multistage high frequency and low frequency components by wavelet decomposition,and the reserved high frequency and low frequency coefficients are determined according to the false alarm rate and the missing alarm rate.By analyzing the influence of quantization on the information entropy and signal quality,the quantization bit width at different levels was determined,and the quantized data was packaged into a data frame format.Meanwhile,the hardware realization of the Mallat algorithm based on wavelet sampling was analyzed.Then,the relationship between frequency band utilization and power utilization in wireless transmission under terminal sensitive projectile environment is analyzed,and the modulation and demodulation mode of 16 QAM signal,the coding form of16 QAM signal and the constellation structure of 16 QAM signal are determined for wireless transmission data.In order to solve the problem of frequency deviation and phase deviation of wireless signal in the environment of bomb,carrier synchronization loop technology based on multi-mode decision algorithm and bit synchronization technology based on interpolation technology are used to realize signal demodulation.At last,the signal of receiver is decoded and reconstructed,and the peripheral circuit of adc,CPU and RF transceiver in wireless transmission system is designed,and the test platform of terminal bomb wireless transmission system is built.