Design And Implementation Of A MIMO Imaging Radar Hardware System

MIMO imaging radar can obtain better spatial resolution compare to real aperture radar and SAR, because it doesn’t need bigger antenna or long accumulated time. During the past decade, many research institutions around the world research the basic theory of MIMO imaging radar and design many kinds of radar system to verify the responding theory. By comparison, only little kinds of radar system have been made in China. Therefore, this paper gives a design and implementation of MIMO imaging radar,which is used for verify the basic theory.Based on the basic theory introduction of MIMO radar, this paper proposed the implementation technology specifications and scheme of MIMO imaging radar. The radar system contains radar signal waveform generator module, digital signal process module and RF transceiver module. Every module can be replaced to obtain better performance.Then, this paper gives detailed description about mission requirements, technical specifications, implementation scheme and circuit implementation of every module.According to the characteristics of radar signal waveform typically used for MIMO imaging radar, the implementation scheme of radar signal waveform generator based on DDS technology has been proposed. This generator has eight output channels within 0～400 MHz and can arbitrarily control the frequency and phase of waveform. Next, the basic digital signal processing technology for MIMO imaging radar has been analyzed, and an implementation scheme of DSP+FPGA dual-core architecture has been presented.This scheme not only can process the large data, complexity algorithm and real-time requirements, but also can control every module of radar system. Finally, base on the specifications of MIMO imaging radar, this paper proposes the implementation specifications of RF transceiver and implements this module using superheterodyne technology. At the same time, this paper presents the detailed circuit implementation of every module.Finally, three module of MIMO imaging radar has been tested. The analysis of the test results proves that the system hardware design is correct and the design of MIMO imaging radar meets the expectations of hardware specifications.