基于压缩信道感知的超宽带混合信道估计  

CS-based channel estimation methods for UWB hybrid channel

作　　者：龚辉[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《电子测量技术》2015年第8期135-139,共5页Electronic Measurement Technology

摘　　要：超宽带信道通常存在多径稀疏特性,因而可采用压缩信道感知技术。然而,在富散射环境中,多障碍物的散射特性通常会导致超宽带信道呈现出一种稀疏和稠密混合模式。因此,在富散射环境下,基于阶段正交匹配追踪压缩感知算法,该文提出了一种基于阶段正交匹配追踪压缩感知与MMSE的联合压缩感知超宽带混合信道估计算法。该算法克服了基于多径分量稀疏假设而忽视散射分量的超宽带信道特性,增强了超宽带混合信道估计的精确性。仿真结果表明,所提出的方法能够对于包含富散射分量的超宽带混合信道获得更小的估计误差。Because of the UWB （Ultra-wideband ） channel multipath sparsity, its estimation is based on sparse assumption.It usually adopts the compression channel sensing technology.However,in the indoor environment, scattering which is caused by multi obstacle environment often leads to ultra wideband channel presents a sparse and dense hybrid mode.Therefore,in consideration of the scattering characteristics of the case,based on the STOMP （stagewise orthogonal matching pursuit）compressed sensing algorithm,this paper proposes a novel channel estimation method which called STOMP-MMSE.The algorithm overcomes the assumption based on sparse which ignore the scattering component of the channel,improving the accuracy of channel estimation.The simulation results show that the method proposed can help ultra wideband hybrid channel which contains scattering component to obtain the estimation error smaller.

关 键 词：超宽带系统 信道估计 混合信道 压缩信道感知 

分 类 号：TN911.5[电子电信—通信与信息系统]