基于FPGA的变带宽基带噪声设计与实现

Design and Implementation of Bandwidth-varying Baseband Noise Based on FPGA

提出了一种基于现场可编程门阵列(FPGA)实现的基带噪声带宽根据符号速率的变化而动态改变的设计方法。对高斯白噪声的产生、变带宽滤波器设计和信噪比控制等进行了重点讨论和分析,并对加入变带宽噪声的基带信号进行了仿真和测试,结果表明设计的变带宽基带噪声可适用于码元速率在64ksps一8192ksps范围内变化的多速率数据传输系统的调试和测试。

This paper puts forward a baseband noise generator based on field programmable gate array （FPGA）, with variable bandwidth according to dynamic symbol rate. To show the principle structure of noise generator, the generation of Gaussian white noise, design of bandwidth-varying filter and SNR. （Signal Noise Ratio） control are discussed and analyzed respectively. In the end, the simulation is designed to test the performance of baseband signal combined with the bandwidth-varying noise. And the results show that the bandwidth-varying noise generator could be used to debug or test transmission systems, symbol rate varying in 64kbps to 8192kbps.