未知多径信道下广义OFDM用户标识点选择  

The choice of user signature point for generalized OFDM through unknown multipath channels

作　　者：何修富[1] 郝坦锁[2] 廖桂生[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071 [2]西安通信学院军事通信指挥系,陕西西安710106

出　　处：《西北大学学报（自然科学版）》2006年第5期721-724,共4页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(60172030)

摘　　要：目的为有效抑制多用户干扰(MUI)和多径衰落,改善误码特性。方法由于信道特性的时变特性,为保证可靠通信,须合理设计用户的标识点。结果合理设计用户的标识点可以避免标识点等于或接近时变信道的零点根,引起大的衰落,使系统性能变差。结论提高了系统的可靠性和误码性能。Aim To suppress the muhiuse interference （MUI） and mitigate the muhipath effect, the principle of G-OFDM through the muhipath channels is discussed. Methods Due to the time variation of channels, the user signature points must be best chosen. Results The user signature points were designed properly to avoid the user signature points equal or close to the roots of the channels making the system performance degeneratly. Conclusion Through a few methods of choosing the user signature point, the performance of G-OFDM compared with traditional OFDM scheme and the abilities of the suppression of the muhiuse interference （MUI） and the mitigation of the muhipath effect are progressed.

关 键 词：广义多载波码分多址 用户标识点 多用户干扰 

分 类 号：TN919.4[电子电信—通信与信息系统]