Design of Multi channel Acquisition System for Phased Array Radar

Abstract

With the steady progress of digitization and information technology, the application field of phased array radar is expanding. At the same time, with the development of wireless communication technology, phased array radar is faced with the challenge of accurately identifying multiple targets in complex electromagnetic environment. The multi-channel acquisition system of phased array radar is the core part of phased array radar. The high performance multi-channel acquisition system has improved the multi-target detection accuracy and anti-interference ability of phased array radar fundamentally. The hardware design includes four main parts: power supply circuit, acquisition circuit, cache circuit and transmission circuit. The power supply circuit provides stable power for the whole system; The acquisition circuit mainly realizes the acquisition of signal by ADC chip and the analog-digital conversion. The cache circuit realizes the data cache of DDR3. The transmission circuit is to realize the communication between the system and the computer. In the software part, Xilinx Kintex-7 series FPGA is selected as the main control chip. The signal acquisition is realized by configuring clock chip and ADC chip. The digital signal is received by using Xilinx primitive. The signal frequency is reduced by digital down-conversion. Finally, construct UDP protocol stack to realize data transmission from system to computer. The results show that the system can run normally, the performance index is also within the specified range, and it has reliable practicability.