Sum And Difference Channels Design And Realization Of Data Acquisition And Processing

Data acquisition of sum and different channel and processing machine are important parts in the digital receiver of single-pulse coherent radar, which are important to improve the range resolution, velocity measure accuracy and angle measure accuracy for the digital receiver.The central goal is to design a stable signal processing board with good signal integrity, large bandwidth, large data processing capability, high resolution and high sampling rate.Relying on actual research projects, a single-pulse coherent radar digital receiver is designed in this paper. The main duties include the designs of a digital receiver,the designs of a signal board and hardware implementation, FPGA program writing , Hardware and software debugging, and the system debugging, major jobs summarized as follows:1. According to single-pulse coherent radar system requirements, the signal processor system is designed, and the function of each module is determined.2. According to the signal processing board functional requirements and performance indicators, 14bit/80MSPS dual-channel signal processing board is designed in this paper.3. Factors affecting the signal integrity are studied, solutions to improve the signal integrity, such as devices layout, the signal traces are proposed.4. The program of digital down conversion is designed.All the work including matlab simulation, verilog programming, and testing are finished.5. The interface converter in FPGA is designed.The test of signal processing board interfaces, functional modules and the system are completed. The field test of the radar is completed, which obtains good results.