Autonomously controllable full-localization four-channel digital anti-interference baseband circuit and implementation method

Abstract

The invention relates to an autonomously controllable full-localization four-channel digital anti-interference baseband circuit and an implementation method. The baseband circuit comprises an FPGA anti-interference baseband processing circuit, a DC / DC power conversion circuit I, a DC / DC power conversion circuit II, a DC / DC power conversion circuit III, a DC / DC power conversion circuit IV, a DC / DCpower conversion circuit V, an intermediate frequency transformer I, intermediate frequency transformer II, an intermediate frequency transformer III, an intermediate frequency transformer IV, an intermediate frequency transformer V, an A / D analog-to-digital conversion circuit I, an A / D analog-to-digital conversion circuit II, a clock driving circuit, a clock distribution circuit, an SPI NOR FLASHstorage circuit, a D / A digital-to-analog conversion circuit, an RS422 interface circuit, a JTAG interface circuit, an intermediate frequency low-pass filter and an EMI filter circuit are included. According to the circuit, all domestic in-situ or functional substitution of a key core circuit chip is realized, and related requirements of GJB150-1986 are met.

Description

technical field [0001] The invention relates to an autonomous and controllable nationally produced four-channel digital anti-jamming baseband circuit and its implementation method, which is a four-channel digital baseband circuit with a localization rate of 100% to meet the needs of Beidou satellite navigation anti-jamming antennas on different aircraft / missile platforms. Anti-interference baseband circuit. Background technique [0002] With the rapid development of the Beidou global satellite navigation system in the past ten years, Beidou satellite navigation terminals have been widely used on different military and civilian platforms. The development of my country's integrated circuit industry lags behind that of Western countries. The relatively low proportion of industrialization seriously restricts the development of the domestic integrated circuit industry with independent intellectual property rights, and is not conducive to the technological innovation and developmen...

AI Technical Summary

Problems solved by technology

[0005] 1) At present, the localization specifications of the Beidou satellite navigation anti-jamming antenna digital anti-jamming baseband circuit components under research and production account for about 70%, which cannot meet the requirement of 100% localization rate and cannot realize independent controllability

In the past two years, with the implementation of national self-controllable and localization substitution policies in the military industry and other industries, the demand for national production of domestic military weapons products has become larger and more urgent, and cannot meet the needs of national production products

[0006] 2) There are hidden dangers of instability in the low-temperature characteristics of imported industrial-grade integrated circuits, which generally only meet the environmental requirements of -40°C, and cannot meet the military temperature environmental adaptability index requirements of low-temperature -55°C for military weapons and equipment in my country

[0007] 3) The imported integrated circuits used in Beidou satellite navigation anti-jamming antenna products are all industrial-grade and of low quality. Military-grade integrated circuits have been prohibited from being sold in my country, which has a great negative impact on the environmental adaptability of my country's military products , which seriously affects the performance of my country's military weapons and equipment

[0008] 4) In order to ensure the performance of weapons and equipment, it is necessary to conduct DPA analysis or secondary screening of imported integrated circuits, which increases the cost of weapon development and prolongs the development and production cycle

[0011] To sum up, at present, the four-channel digital anti-jamming baseband circuit of Beidou satellite navigation anti-jamming antenna cannot realize independent control and 100% localization, and the environmental adaptability and electromagnetic compatibility need to be improved

Images