The Research Based On FPGA Embedded System

With the developments of electronic technology, the phase laser range finder, a resolution distance measurement equipment, has been extensively used in the civil and military field because of its excellent performance.The paper introduced a phase range system based on FPGA embedded technology. Three functional module in the range system: modulability signal generation source, information control unit and information management unit, can be designed in one PLD chip, so a majority of shortcomings of traditional phase laser range were conquered by this excellent innovation in circuits.In the first part of this paper, the theory of laser range and DDS technology was introduced, the factors of influencing range precision were also analysed. At the same time, put forward in the paper, with using the FPGA embedded technology, the wideband and high resolution SIN modulating signals can be generated easily, then analysed the noise of the DDS; In the second part, the theory of phase measurement based on FFT was analysed.In the phase range system, by using the FFT operation, the resolution and sensibility of phase measurement can be enhanced; Then some circuits were designed and come true, also simulated and validated; In last part, the improvement of the phase range system was brought forward, summarized and expected.