The Design of Pseudo-random Signal Transmitting Electromagnetic Detection System Based on FPGA
In order to overcome the shortcomings of the single transmission frequency and poor anti-interference ability of traditional geological exploration systems, this article designs a pseudo-random signal transmitting electromagnetic launch system based on the highly integrated, convenient, and flexible design characteristics of field programmable gate array (FPGA). Using linear feedback shift register (LFSR) and technology of direct digital frequency synthesis (DDS), the output signal has a random frequency, and it can effectively avoid the influence of the outside electromagnetic interferences which are difficult to remove in the past, and can increase the noise ratio in a low power to get satisfactory results. At the same time, it can transmit signals of multiple different frequencies in one power supply to improve the detection efficiency. It’s suitable for the exploration and development of our multi-mountain mineral.
Thanks to National Natural Science Foundation of China (51137004, 50977084, 61002036), Chinese Academy of Sciences innovation fund (CXJJ-11-Q75), Beijing Nova Program (2009B48), and National Science and Technology Support Program (2009BAI71B05).
- 1.Shi FS (2009) A study on high-power multi-function transmitting system. Prog Geophys 24(3):1109–1114Google Scholar
- 2.Li JM (1996) A generalized description of the development of electric exploration methods. Geophys Geochem Explor 20(4):250–258Google Scholar
- 3.He JS (2007) The new development of frequency domain electro-prospecting. Prog Geophys 22(4):1250–1254Google Scholar
- 4.Luo ZX, Gao SL (2007) The design and application of CPLD/FPGA. The People’s Posts and Telecommunications Press, Beijing, p 10Google Scholar
- 5.Altera Corporation (2006) Cyclone II device handbook, vol 1Google Scholar
- 6.Sundararaman R, Upadhyay HN (2011) Stego system on chip with LFSR based information hiding approach. Int J Comput Appl 18(2):24–31Google Scholar
- 7.Wu WQ, Li HZ, Wei Z (2009) Design of parameterized LFSR modules based on VHDL. J Nav Univ Eng 21(3):91–94Google Scholar
- 8.Chen GH, Xing ZY, Li GP (2008) Research and design of the arbitrary waveform generator based on DDS technology. Int Electron Elem 6:33–35Google Scholar
- 9.Luo JH, Cheng GW (2010) Design of DDS signal source based on FPGA. Electron Des Eng 18(1):66–70Google Scholar
- 10.Yin L, Jin HJ, Li YX et al (2009) Research and realization of high precision signal generator based on DDS technology. Mod Electron Technol 288(1):68–69Google Scholar
- 11.Li ZG, Zhang NK (2002) Integrated chip AD 558 and its application. Foreign Electron Meas Technol 3:11–16Google Scholar