Design And Implementation Of Processing Equipment To The Terminal. Ultrashort Wave Measured

The terminal equipments of measuring the direction of VHF/UHF signal, used as the important part of measuring the direction system of VHF/UHF, can not only measure the direction of the steadfast communication signals, but also the frequency hopping communication signal, the outburst signal, the pluse signal of L wave band. It is required the high detection probability, the short response time, for adapt to the demand of reconnaissance at present.This thesis is exactly the engineering research lesson aming at the above request. This thesis first introduced the present condition of measuring the direction of VHF/UHF and the source, the function characteristics of the items. And then it descried the designment of VHF/UHF system and the adoptive arithmetic. In succession, it descried the hardware designment of terminal equipment. And afterward, it detailedly descried the inbuilt software and the internet applications, and concrete design and realized methods. At last, it descried the test circumstance, conclusion and the expectation of the equipments. It detailedly emphasized to the arithmetic and the system, the technique of showing the result, including the measure direction arithmetic of correlation interferometer, and DirectDraw technique that realized the graphics manifestation of the measure direction result.The equipments convert the radio frequency signal to intermediate frequency, then send it to AD collection card for AD transformation. The data after transformation is sent to the measure direction card. The FPGA-- Field Programmable Gate Array-of the card is realized the arithmetic of the measure the direction, and the DSP-digital signal processing-is fulfilled the flow control and command parameters'resolution. Also the result is transmitted to the surveillant software by the same DSP. At last the result is presented on the monitor with the manner of graph and sheet by the surveillant software.By the various tests, the equipment of preamble is proved to achieving the all sort of guideline requestion. It is an applied embed measure direction system, and it can be used to actual engineering item.