基于干扰对齐技术的无线通信系统设计

Design of Wireless Communication System Based on Interference Alignment

干扰是制约多用户无线通信系统容量的首要因素,传统正交化的干扰管理方式采用分割的方法分配无线资源,每个用户分到的资源随着用户数量的增加而减少,当用户数量较多时会严重降低用户的通信速率。干扰对齐是一种新型的信号处理技术,为提高多用户无线通信系统的容量提供了有效的解决方法。介绍了干扰对齐的基本原理,给出了完整的干扰对齐系统实现方案,包含通信流程、算法设计、信道状态的估计量化及反馈方案。最后,通过仿真验证了干扰对齐的性能。

Interference is the main restriction to the capacityof multi-user wireless communication system.The traditional method for interference management is orthogonalization,which split the radio resouree for users.The larger the user number,the resource assigned to each user is less, leading to data rate per user declined significantly. Interference alignment （IA） is a novel signal processing technique which provides a useful method for improving the capacity of multi-user wireless communication system. In this paper, the bas- ic theory of IA is introduced.Then,the whole implementation scheme of IA is provided,including communication procedures, algorithm design,quantized channel state estimate and feedback method.Finally,the performance of IA is validated by simulation.