Four-channel Radar Digital Receiver Based On Fpga Technology Research

With the rapid development of radio-technology, the electronic countermeasure technology has been continuously enhanced. To adapt the increasingly complex environment of electromagnetism and target, radar must have the capability of high accuracy, reliability and anti-jamming. We must improve the performance of digital receiver and ensure the nicer properties of radar. With the fast development of the digital technology, the Multi-channel digital receiver of radar is getting wide application.Considering the development of software radio technology and FPGA, this dissertation analyze the theory and principle of digital receiver, propose a scheme of four-channel digital receiver, implement the hardware circuit and software design, and debug the system design on the hardware bench. This receiver can realize decimation from4to16384, and it can be used widely in many fields.The primary work of this dissertation includes:1. Introduce the theory and principle of digital receiver, and give a scheme of four-channel radar digital receiver based on FPGA.2. Design and implement DDC based on the cascade technique of Multi-type filters(CIC filters, HB filers and FIR filters), realize decimation from4to16384.3. Complete schematic circuit diagram and printed circuit board (PCB) design for four-channel radar digital receiver.4. Complete Matlab validation and Modelsim simulation of the system.5. Accomplish software and hardware design for system, and debug the design on PCB as well, the test result shows that this digital receiver can satisfy the technical specification request of the system.