Noise Fm Radar, Digital Research

Noise FM radar has more advantages over ordinary radar in that the transmittingsignal of noise FM radar is noise signal. As its transmitting signal is random, noiseFM radar possesses good low probability of being captured and strong anti-jammingability, besides, it has good character of measuring distance and velocity.In the 1980's,the products of noise FM radar system that we develop successfullyadopt analog devices. But noise source and other components are hard to keep stablenoise statistical characteristic just because analog devices are affected by temperatureeasily; another important reason that influence noise FM radar system to put intopractice is analog devices are difficult to be integrated and minimized, so itsimplementation is restricted in many respects.With the development of digital signal processing technology and ASIC, DSP,FPGA, we can solve the problems mentioned above easily. Especially, there are manyresources in FPGA, it can be programmable for many times and fast speed let it bequalified for most work in system.In this paper, I work over the digitalized of noise FM radar system. Firstly, Ianalyze the difference of the math expression between the digitalized system and theanalog signal processing, and simulate the signal processing of digitalized of noiseFM radar system. And then, I Combine software Quartus and hardware FPGA toresearch and realize the digitalized of noise-modulating source, and produce thedigital wide-restricted Gauss White Noise that according with the technologyguideline. Finally, I design the module of signal-adjusting, and producenoise-modulating source in hardware.