Radar imaging method based on Zynq-series FPGA

Abstract

The invention discloses a radar imaging method based on a Zynq-series FPGA. The method mainly solves the problems that an existing imaging system is complex in structure, long in development period and not transportable. The method includes the implementation steps that data required for radar imaging are generated with Matlab software and introduced into Vidado HLS software, and the data undergo pulse compression in the software so as to achieve radar imaging; the progress for achieving radar imaging is optimized, an optimized result is converted into a register transfer level; time sequence simulation is performed on the RTL through Modelsim software so as to meet requirements of a handshaking mechanism; the RTL meeting the requirements of the handshaking mechanism is led out with Vivado HLS software, so that the register transfer level becomes a universal IP core having the radar imaging function; the generated IP core is called in the FPGA, data are input at the input end of the IP core according to the time sequence, radar imaging data are obtained at the output end of the IP core, and therefore radar imaging in the FPGA is completed. According to the method, the structure of the radar imaging system is simplified, the development period is shortened, and the radar imaging system is transportable.

Description

technical field [0001] The invention belongs to the technical field of digital signal processing, and relates to a radar imaging method realized by Zynq series FPGA, which can be widely used in the fields of target tracking, remote sensing, video processing and the like. Background technique [0002] Synthetic aperture radar SAR has two-dimensional high-resolution range and azimuth, and can perform high-resolution two-dimensional imaging of the scene. It can detect and locate targets all-weather, all-day, and long-distance, and plays an important role in many fields. The most basic step of the radar imaging algorithm is pulse compression. When transmitting a pulse, the narrower the pulse, the wider the signal frequency band. However, it is very difficult to transmit a very narrow pulse and have a high peak power. The wide broadband signal is received by pulse compression to obtain narrow pulse. [0003] In the existing technology, most of them use DSP to realize radar imag...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, most of them use DSP to realize radar imaging. In the latest signal processing board, the latest octa-core DSP of TI is mainly used to realize radar imaging. Although this method is efficient in development High, but the implementation quality is relatively poor, the processing speed is slow, and the system structure is complex, and the power consumption is very large

For this reason, there is a method of using FPGA to realize radar imaging. For example, in 2009, Jiang Weihua published a paper "Design of FPGA-based Radar Imaging Azimuth Pulse Compression System" in "Electronic Science" magazine, Vol. Azimuth pulse compression, although this method has achieved good results, but the implementation process of this method is complicated and cumbersome, the resource utilization rate is not high, and the developer must have a lot of RTL debugging experience, and the FPGA program needs to be repeated. Only by debugging can the effect given in the literature be obtained, which makes the development cycle very long, and this method is not portable and can only be applied to a specific FPGA

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