一种基于FPGA跳频解码实现方法

跳频技术作为一种有效的抗干扰手段,广泛应用于现代雷达信号处理领域。为了准确接收到各个频率片,确定频率片的起始点,需要对接收的序列进行连续的FFT处理。目前FPGA器件厂商提供的FFT处理模块不能满足这一时序要求,这里提出了一种基于FPGA的快速连续FFT实现方法,以相对较少的硬件资源换取时序要求。实验证明,该方法能够满足时序和精度要求,同时通过了FPGA的时钟约束条件,满足工程应用的实时性要求,有一定工程应用价值。

Implementation of frequency hopping decoding based on FPGA

As an impactful anti-interference method,frequency-hop is widely used in modern radar signal processing field.To detect starting point of the frequency spice,we must process the receive sequence with FFT continuously,but FFT core of FPGA can’t realize this function.In this paper,a method is presented to resolve the problem.Test results show that the method can meet the requirement of project,has a magnificent value in the project.