一种基于多模板的超宽带信道估计算法  

A Channel Estimation Algorithm of Ultra-wideband System Using Multi-Templates

作　　者：徐微[1] 赵加祥[1] 王东[1] 艾小溪[1] 

机构地区：[1]南开大学信息技术科学学院,天津300071

出　　处：《电子与信息学报》2010年第10期2468-2472,共5页Journal of Electronics & Information Technology

基　　金：天津市应用及前沿技术研究计划(08JCYBJC12600)资助课题

摘　　要：该文针对码片率抽头间隔的脉冲超宽带(IR-UWB)系统离散信道,提出一种基于帧(frame)级采样速率的多模板信道估计算法。在该算法中引入了若干个复合信道参数,每个复合信道参数都是几个独立信道参数的线性组合。利用极大似然准则和从多个模板中获得的帧级采样数据,可以先获得所有复合信道参数的极大似然估计值。然后联合由不同模板得到的复合信道参数估计值,得到每个独立的信道参数的极大似然估计。通过仿真,验证了该方法的可行性。For the chip rate sampled channel impulse response of the IR-UWB system,a novel optimum data-aided channel estimation scheme is proposed that utilizes multi-templates to extract the frame-level samples from the received signal.Each frame-level rate sample for any given template is decomposed to a sum of a composite channel parameter（i.e.,a linear combination of some channel parameters） and a noise.Based on these frame-level rate data and the maximum likelihood（ML） criterion,the ML estimates can be obtained for the composite channel parameters contained in these samples.The channel parameters can be computed through solving a set of the linear equations determined by the composite channel parameters.The simulations are provided to demonstrate the effectiveness of the proposed approach.

关 键 词：超宽带通信 信道估计 多模板 Frame级采样率 

分 类 号：TN92[电子电信—通信与信息系统]