基于FPGA的数字正交变换信号的脉冲压缩

Implementation of digital orthogonal transformation pulse compression system based on FPGA

在现代雷达信号处理领域,实现高精度的数字信号脉冲压缩是一项关键技术.在进行时域脉冲压缩前,引入数字正交变换模块,提取I、Q基带信号,保证了较高的通道幅相一致性.对基带信号进行时域脉冲压缩,运算简便,实时性强,便于硬件实现.设计中采用Matlab和FPGA联合调试的方法,利用Matlab进行方案验证,采用Quartus Ⅱ软件进行方案实现,核心模块采用IP核实现,大大缩短了调试周期,并且提高了系统的稳定性.本系统具有运行速度快、功耗低、实现简单、实用性强等优点.

In the modern radar signal processing field, achieve high-precision digital signal pulse compression is a key technology. Before performing time-domain pulse compression, this design introduced a digital orthogonal transformation module which could extract the baseband signal I, Q and maintain a high consistency of the amplitude and phase. The do- main pulse compression of base-band signal method has the character of simple calculation, real-time process, easily implemented in hardware. This paper used the Matlab and FPGA joint debugging method which using Maflab for program verification with Quartus II for system implementation. The IP cores of the core part greatly shorten the commissioning period and improved the stability of the system. It was concluded that this system has the advantages of fast computing speed, low power consumption, easy to realize and practicability.