基于SC-FDMA系统的频域均衡技术研究  

Research on frequency domain equalization technology based on SC-FDMA system

作　　者：桂欣[1] 李一兵[1] 叶方[1] 高振国[2] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《计算机工程与设计》2011年第5期1762-1765,共4页Computer Engineering and Design

基　　金：国家自然科学基金项目(60703090);哈尔滨市科技创新人才研究专项基金项目(2008RFQXG025);中央高校基本科研业务费专项基金项目;中央高校基本科研业务费专项基金项目(HEUCF100809)

摘　　要：为了克服SC-FDMA(single carrier frequency division multiple access)系统恶劣的传输环境,提出了基于SC-FDMA系统的频域均衡技术用来克服多径衰落、提高系统的传输性能。分别对线性均衡和判决反馈均衡在不同的信道和不同的子载波映射方式下的性能进行了分析比较。仿真结果表明,频域均衡技术对于集中式子载波映射(LFDMA)的效果优于插入式子载波映射(IFDMA),在PedestrianA信道和VehicularA信道下,判决反馈均衡的性能明显的优于线性均衡,能够在一定程度上提高系统性能。To overcome the harsh environment in SC-FDMA communication systems, the frequency domain equalization based on SC-FDMA system to overcome the multi-path fading and improve system performance is presented. The performance of linear equalization and decision feedback equalization with two different sub-carrier mappings under two different channel will be analyzed and compared. The simulation results show that the performance of LFDMA is better than IFDMA in SC-FDMA system. And no matter in Pedestrian A and Vehicular A channel, decision feedback equalization is better than linear equalization, the performance of SC-FDMA system is greatly improved.

关 键 词：单载波频分多址 长期演进计划 集中式子载波映射 插入式子载波映射 线性均衡 判决反馈均衡 误符号率 

分 类 号：TN929.5[电子电信—通信与信息系统]