Device and method for detecting agile coherent target based on FPGA (Field Programmable Gate Array) and DSP (Digital Signal Processor)

Abstract

The invention discloses a device and a method for detecting an agile coherent target based on an FPGA (Field Programmable Gate Array) and a DSP (Digital Signal Processor). The device comprises an A / D (Analog to Digital) module, an FPGA module, a first DSP module, a second DSP module and a PC (Personal Computer) module. The method comprises the following steps of: (1) preprocessing echo signals containing agile coherent signals by using an FPGA (Field Programmable Gate Array); (2) enabling the FPGA to send an echo signal matrix to a DSP; (3) constructing a two-dimensional dictionary matrix of each DSP module; (4) acquiring target speed and distance information; and (5) performing imaging and displaying the target distance and speed information. According to the invention, the architecture characteristics of the FPGA and the DSP are fully utilized, the parallel execution advantage and the processing speed of the multi-core DSP are exerted, and the accuracy and the signal-to-noise ratio of the agile coherent target detection are improved on the premise that the real-time performance is well met.

Description

technical field [0001] The present invention belongs to the field of radar communication technology, and further relates to a field-programmable gate array FPGA (Field-Programmable Gate Array) and digital signal processor DSP (Digital Signal Processing)-based agile coherent target detection device in the field of radar imaging technology and methods. Aiming at space moving targets, the invention adopts pulse-to-pulse coherent frequency-agile radar to detect the target area in real time, and obtains the speed and distance information of the target. Background technique [0002] The anti-interference ability of radar is the key to ensure the survivability of the radar system on the battlefield, and the pulse-to-pulse coherent frequency-agile radar has excellent anti-interference ability due to the high-speed irregular jump of the carrier frequency, which provides more opportunities for the detection of moving targets. good platform. At present, the inter-pulse coherent and a...

AI Technical Summary

Problems solved by technology

It is used to solve the problems of long time-consuming, poor reliability, low signal-to-noise ratio, and inaccurate extraction of target distance and speed information in existing target detection methods

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