基于FPGA的伪随机交织器的设计与实现

Design and realization of pseudo-random interleaver based on FPGA

随着通信技术的快速发展,对通信系统的抗干扰性能的要求越来越高。高斯白噪声因其最为常见,且其频谱较宽,干扰的频带范围较大,是一种用于通信系统性能测试的比较理想的干扰源。设计采用交织技术实现了以反馈输出数据为读地址的伪随机交织器,对利用线性反馈移位寄存器产生伪随机序列,然后通过BOX-MULLER变换法进行变换产生出高斯随机数的方法进行改进,取得了很好的效果。

Along with quick developing of communication technique,the requirement to the anti-jamming function of communication is increasing.Gaussian white noise is the most common noise in communications,its frequency spectrum is wide,and the frequency band scope of interference is big.So it is a kind of fairly ideal interference source that is used to test the communication performance.A pseudo-random interleaver that has stronger effect is designed by adopting interleaving technique.Using this technique,it is an improvement to the former method that gives rise to Gauss random number by making use of LFSR and BOX-MULLER transform,and gained very good effect.