ESTIMATION OF BASIS EXPANSION MODELS FOR DOUBLY SELECTIVE CHANNELS  

作　　者：Liu Yingnan Gao Yonghui Zhang Nu Liang Qinglin 

机构地区：[1]School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China [2]Dfh Satellite Co. Ltd, Beijing 100871, China

出　　处：《Journal of Electronics(China)》2008年第1期115-119,共5页电子科学学刊（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No.60462002).

摘　　要：By analyzing the relationship between Basis Expansion Model (BEM) and Doppler spectrum, this letter proposed a quasi-MMSE-based BEM estimation scheme for doubly selective channels. Based on the assumption that the basis coefficients are approximately independent and have the same variance for the same channel tap, the quasi-MMSE estimation shows approximately optimal performance and is robust to noise. Moreover, it can avoid a high Peak-to-Average Power Ratio (PAPR) by using continuous pilots. Performance of the proposed estimation scheme has been shown with computer simulations.By analyzing the relationship between Basis Expansion Model （BEM） and Doppler spectrum, this letter proposed a quasi-MMSE-based BEM estimation scheme for doubly selective channels. Based on the assumption that the basis coefficients are approximately independent and have the same variance for the same channel tap, the quasi-MMSE estimation shows approximately optimal performance and is robust to noise. Moreover, it can avoid a high Peak-to-Average Power Ratio （PAPR） by using continuous pilots. Performance of the proposed estimation scheme has been shown with computer simulations.

关 键 词：Channel estimation Doubly selective channel Basis Expansion Model （BEM） Meansquare error 

分 类 号：TN911.23[电子电信—通信与信息系统]