The Study And Realization Of DRFM

In this thesis, it will introduce some technology of DRFM. it will mostly describe expanding function of the former DRFM system, and make the design of PCB more rationally. it will describe the principle of DRFM.Incorporated with jimming modulation technology, it also studies the theory of jamming technology based on DRFM.The former DRFM system is copying and storing and sending the received signal, but the data is not opening. In this text, The system makes use of the cPCI configuration, and stores the data by ADC sampling then makes it communication to the computer. Analyses and transacts the data by the computer, for example, FFT and FIR, which is the same as the digital receiver. Furthermore, it can create the data by the computer, and transmitted to the DRFM board and changed the analog signals to send by DAC. There is the random signal. Based on the examination, it is adaptive in deception jamming ,and it is easy to come true in project.The ordinary DRFM has some configurations. One is ADC/DAC board and memory board, for example, the secondary product of CSIR. The other is ADC board and DAC board, for example, the tertiary product of EWST. This two fashions need two boards and a motherboard But in my design, it makes 6U standard, and the integration circuit on one board. It will make the configuration more reasonably and reduce the weight. Not only be fit for the floor equipment, but also the airplane. Because it is small cubage,light weight and little power. When the engineer designs the PCB, it can use the new software of the Mentor, and makes use of HyperLynx to examine. it will reduce the infection of PCB and make the system successful.