中继的接入改善了小区边缘用户的通信质量、扩大了其覆盖范围，却产生了新的干扰源、增加了新的链路，造成帧结构的改变和资源争夺的加剧。本课题从LTE-Advance系统下行调度与资源分配模型入手，主要研究LTE-Advance系统的干扰协调分析、基于压缩感知和小波降噪的UWB信道估计、联合复用技术与路由选择的LTE-A系统下行调度与资源分配、基于用户感知QoS的LTE-A下行调度与资源分配等,搞清中继摆放位置和中继摆放密度对系统性能的影响。本项目的研究成果旨在提高LTE-A系统资源利用率、提高系统的吞吐量、保证多业务类型的QoS需求、保证用户的公平性，同时对系统的初始网络布局和网络节点优化设计也提供一定的指导作用。

Relay can provide some benefits to wireless communications, such as enhancement of communication quality of users on the cell edge and coverage extension, however it leads to new interference resource, change of frame structure and generates new radio links, which results in aggravation of contest for radio resource.Starting from the model of downlink scheduling and resource allocation for LTE-advance system, the research content of the project mainly focus on interference coordination and analysis, channel estimation for UWB based on compressed sensing and wavelet transform, downlink scheduling and resource allocation combined duplex and router selection, and downlink scheduling and resource allocation based on users' sensed QoS. Finds out the infuence of relay placement and density on system performance of the LTE-advance system. The research result of the project aims to improve the resource utilization, to increase the system throughput, to ensure the QoS requirements of different traffic and to ensure the fairness of users.Moreover,the research results can also provide some guidance to the initialization of the network layout and to the optimal design of network nodes.