毫米波雷达数字复数下变频正交采样方法研究

Research into Quadrature Sampling Method of Digital Plural Down-conversion for Millimeter Wave Radar

运用数字化的直接下变频技术,在进行滤波器采样的同时,达到了信号下变频目的,从工程实践的层面降低了难度。通过推导和计算,将得出的最优化采样频率应用到毫米波雷达中频信号采样过程中,仅用一个模数转换器(ADC)和相关器件完成了系统的整体设计,降低了施工成本,提高了信号处理的速度和准确率。

This paper uses the digital direct down-conversion technology to achieve the purpose of signal down-conversion while the process of filter sampling,decreases the difficulty from engineering practice aspect,applies the obtained optimization sampling frequency into the sampling process of intermediate frequency signals of millimeter wave radar through deduction and calculation,only uses an A/D converter and relative devices to complete the whole system design,which reduces the construction cost and increases the speed and accuracy of signal processing.