The Study Of Artillery Locating Radar Coherent Integration Algorithm And Its Realization

Emplacement reconnaissance and fire radar is a ground-based radar,and its main function is to detect enemy emplacements,and our artillery firing accuracy of the calibration.With the gradual opening of low-altitude,slow low small(low-altitude,slow,small radar cross section)target threat to public safety is becoming more serious.With respect to the optics,laser radar,reconnaissance and fire radar emplacements having all-day,all-weather,long working distance advantages and beam flexible scheduling,tracking ability,it is an effective tool to detect small targets low slow.Coherent integration can improve the signal to noise ratio of radar echo signals,a method wide ly used in radar signal processing,and has a very important role in target detection and parameter extraction.Long coherent integration method can effectively improve the low SNR slow small target and increase the frequency resolution,help detect slow low small targets.In the classical coherent integration mode(resident mode)on the basis of this paper to explore a new method to achieve coherent integration,namely the frame accumulation mode.This article first coherent integration method introduced in detail,and this method brings dimension and frequency dimension distance migration problems and their solutions are described;Then introduced the program resides mode implementation framework and specific algorithm;Combined with the actual experimental system by modifying the CFAR detection algorithms to solve the false alarm problem exists in resident mode radar pulse length detection distance junction.It describes the amplitude and angle measurement worse than a simple and practical implementation;Finally,the beam scheduling policy and program frame accumulation mode implementation framework.Signal processing algorithms radar system is on a TMS320C6678 achieved,use a large amount of data movement operations,but also use a variety of interrupts,t hus,the paper finally C6000 series DSP EDMA data transfer controller and interrupt the class chip control systems were introduced.