摘要
具有高速中频数字采样、数字下变频、正交相位检波、大时宽脉冲压缩的现代雷达数字接收系统,其时域的数字下变频、正交相位检波、脉冲压缩实现包含了大量的乘加运算,如何进一步简化算法,降低运算量,值得研究。在介绍了各个处理模块原理的基础上提出了一种新的基于频率域一体化实现算法,此算法与时域级联实现方法相比显著降低了运算量。同时给出了工程实现的通用结构,在此基础上对一种典型情况进行了Matlab仿真,仿真结果表明此方法结构简单,有很强的工程应用价值。
There is a large amount of computations of multiplication and addition in a radar system with high rate sampling, quadrature demodulation, digital down conversion, and big width pulse compression. Thus, how to simplify the algorithm and reduce computations become a research topic. In this paper, a new method that implements those functions in frequency domain for radar is introduced. According to the new method, Matlab simulation is done towards a typical case. The results illustrate that the new method is valuable in practice.
出处
《雷达科学与技术》
2009年第6期472-478,共7页
Radar Science and Technology
关键词
脉冲压缩
数字下变频
正交相位检波
快速傅里叶变换
频谱
pulse compression
digital down conversion
quadrature demodulation
fast Fourier trans form（FFT）
frequency spectrum
