| 摘要: |
| 针对频率选择性信道下宽带数据传输存在符号间干扰(ISI)，提出了一种频率选择性
信道下联合Turbo码和单载波频域均衡（SC-FDE）的宽带传输方案。通过改进传统SC-FDE结
构，设计了一种SC-FDE软信息提取方法，提高了进入Turbo码译码器先验信息的精确性，从
而改善了系统整体性能。仿真结果表明，相比较于硬信息输出，采用SC-FDE软信息输
出能够改善输出信噪比，提高系统性能。 |
| 关键词: 宽带无线通信 单载波频域均衡 Turbo码 多径信道 软信息
输出 |
| DOI： |
|
| 基金项目:国家高技术研究发展计划（863计划）资助项目（2006AA701419） |
|
| A Joint Scheme of Turbo Codes and SC-FDE in Frequency Selective Fading Channel |
| XU Ding-gen,CHENG Nai-ping |
| (Graduate Management Unit,The Academy of Equipment Command & Techn
ology,Beijing 101416, China;Department of Optical and Electrical Equipm
ent, The Academy of Equipment Command & Technology, Beijing 101416, China) |
| Abstract: |
| A joint scheme of Turbo codes and SC-FDE (SingleCarrier Frequency
Domain Equalization) is proposed to avoid intersymbol interference(ISI) of wi
deband data transmission in frequency se
lective fading in this paper. The veracity of SC-FDE output symbol i
nformation into the SISO decoder of turbo codes is increased through improving
the structure of SC-FDE and designing the method for the symbol soft information
calculation. The simulation results show that the joint scheme of Turbo cod
es and SC-FDE with soft output gains the advantage over the one with hard output
and improves the transmission system. |
| Key words: broadband wireless communication SC-FDE Turbo code multi path channel soft
information output |
