A multi-functional high-dynamic intermediate frequency signal acquisition and processing module

Abstract

The signal acquisition and processing module, as a crucial component, is essential for achieving high-performance radar receivers. In this paper, based on key chips such as ADC, FPGA, MCU, clock, and ethernet, a multi-functional high-dynamic intermediate-frequency (IF) signal acquisition and processing module is designed. This module adopts optimized ADC analog front-end design, high-performance clock distribution, and data reception with preprocessing technology, effectively enhancing the dynamic performance of the acquisition module. Additionally, by utilizing MCU in conjunction with Ethernet communication, remote access debugging and program updates for the acquisition module are achieved, providing convenience for engineers to conduct remote maintenance in complex environments. Furthermore, functionalities such as power detection, fault detection, channel gain control, and high-speed data transmission are integrated, expanding the module's application potential. Through practical tests, the IF signal acquisition module demonstrates a signal-to-noise ratio greater than 70 dB, a spurious-free dynamic range greater than 80 dB, an effective number of bits greater than 11.5 Bits, and total harmonic distortion less than -80 dB, meeting the application requirements of ground detection radar and shipborne radar.