The Design of Pseudo-random Anti-jamming electromagnetic Transmitter Based on ARM_FPGA

摘要

Based on the invert-repeated m-sequence pseudo-random signal’s anti-jamming character onrngeophysical electromagnetic method, we proposed using ARM_FPGA to design invert-repeated m-sequencernpseudo-random anti-jamming electromagnetic transmitter. The transmitter is made up by low-voltage partrnand high-voltage part. The low voltage part is composed of ARM control platform and digital logicrnprogramming device FPGA. The high voltage part is composed of IGBT switch and its driving module. Thernspecific workflow is as follows. ARM platform controls FPGA to generate PWM signals, then the signalsrnpass through high-speed optocouplers and are switched to high-voltage section. The PWM signals drive thernIGBT driving module to control the IGBT switches turn-on and turn off, so as to realize the transmit signals.rnAfter the transmitter function is realized, the transmitter is tested. During the tests, the voltage emitted is uprnto 800V and the corresponding current emitted is 3.84A, and the transmitter can work for several hours. Thenrnwe change the resistance load, the voltage is 200V and the corresponding current is up to 20A. The testsrnshow that the transmitter design is feasible, and can achieve high voltage and high current power supply, hasrngood application prospect.