预编码的反馈方式的仿真

本文主要对预编码的反馈方式进行研究。首先介绍了预编码技术，然后分别对离散傅里叶变换码本反馈法和格拉斯曼码本反馈方式进行介绍和分析。最后在Mat lab上对系统误码率进行仿真，比较不同反馈方式对于预编码性能的影响。格拉斯曼码本反馈法的性能好于离散傅里叶变换码本的性能，但是格拉斯曼码本反馈更复杂。

The Feedback Simulation of Precoding

In this paper,the main work is the research of feedback methods of precoding. First,it introduce the precoding technology. Then,it introduce and analysis Discrete Fourier Transform codebook feedback and Grassmannian codebook feedback. Finally,the simulation results of different feedback methods effect about precoding on Matlab are compared. Simulation results show that Grassmannian codebook feedback better than system capacity of Discrete Fourier Transform codebook feedback. But Grassmannian codebook feedback is more complex.