Research On High-Efficiency Realization Of Radar Reconnaissance Digital Receiving And Processing Methods

Radar reconnaissance,as an important component of electronic warfare,has a great influence on the outcome of the war.With the rapid development of modern information technology and radar,modern electronic warfare has involved multiple fields,multiple spaces,multiple electromagnetic spectrums,and multiple operational arms.Therefore,on the basis of guaranteeing performance,radar reconnaissance puts forward higher requirements on compatibility,expandability,power consumption and device volume.Using the Zynq platform can replace the signal processing module of the reconnaissance receiver based on FPGA+DSP in the past.While ensuring performance,it has great advantages in power consumption,volume,area,and price,and promotes the diversified development of electronic warfare tactics.This thesis is based on Xilinx's Zynq-7020 platform to achieve efficient reception and processing of radar signals.The main work is as follows.1.On the PL part of the Zynq platform,signal preprocessing is implemented.Channelization technology is used to divide the AD sampled signal into 8 channels according to different frequency domains.Then the detected signal and the channel number,TOA and PW framing ready to send.Through the use of channelization and other technologies,the occupancy of system resources by receiving preprocessing systems is greatly reduced.2.We implement signal transmission on the PL part of the Zynq platform.The framing data is written to PS on chip memory or external DDR through the AXI transfer module.Different from the previous external interface,using AXI internal bus can eliminate wiring troubles and improve data transmission efficiency.3.Signal analysis is performed on the PS part of the Zynq platform.We read the data written by the PL and de-frame the data.The obtained signal is used to identify the signal modulation type by using 3dB bandwidth,multi-phase difference,linear fitting,histogram statistics and other methods.The identified signal's in-pulse parameters are estimated by performing FFT autocorrelation and other processing.4.The PS part of the Zynq platform communicates with the host computer.The signal analysis results and other reconnaissance data contained in the PL data are sent to the host computer for display.PS port contains a lot of external interfaces,so that the system can easily interact with the outside and enhance the flexibility and scalability of the system.