中频直接序列扩频信号模拟器的设计与实现

介绍了一种软硬件结合的中频直接序列扩频信号模拟器的设计与实现方法，并对模拟器设计的可行性进行了分析，得出了基带数据经过内插滤波和数字正交调制后，能够获得比基带数据率更高的中频调制信号的结论。结合直接序列扩频信号和高斯白噪声的特点，基于ICS-564数据回放板用软件模块实现了扩频信号和噪声信号的基带I、Q数据，并对该模拟器输出的加噪声和未加噪声的中频直接扩频信号进行了比较分析。

Design and Implementation of an Intermediate Frequency Spread Spectrum Signal Generator

The paper introduces the design and implementation method of a direct sequence spread spectrum signal generator. The paper analyzes the design feasibility of this generator based on the software radio theories, and confirms that the base band data can be converted to the intermediate frequency modulated signal at a higher rate after the interpolation and the digital quadrature modulation. The signal and noise base band data is generated by the software module and then be transmitted by the hardware ICS-564 board. Analysis the spectrum of the signal without noise and the spectrum of the signal with noise exported by the generator.