超宽带雷达线性调频（LFM）脉冲压缩信号产生系统是现代雷达技术的重要研究内容之一。该文基于波形存储直读法，提出了一种超宽带线性调频信号数字产生系统方案。对系统中幅度量化位数、采样频率、正交调制器误差和传输系统频域失真等因素对输出信号性能的影响进行了深入的理论分析，计算机仿真验证了这些分析结果。所得结论为超宽带LFM信号产生系统工程实现时参数选择、性能评估和性能优化提供重要的理论依据。

The ultra wide-band(UWB) linear frequency modulated(LFM) pulse compression signal generation systems are important research contents in modern radar technology.On the basis of the waveform storage method,a digital generation system scheme for ultra wide-band radar LFM pulse compression signals is presented in this paper.The effects of the amplitude quantization bits,the sampling frequency,the errors in the quadrature modulator and the distortion of the transmission system in frequency domain on the performance of the output signals are investigated in detail.The results are finally proved by computer simulations.All the conclusions provide important theoretical bases for the parameters selection,the performance evaluation and the performance optimization of the engineering implementation of the ultra wide-band LFM signal generation system.

TN957.51