基于Turbo信道编码的SC-FDE系统  

SC-FDE System Based on Turbo Channels Encoding

作　　者：刘顺兰[1] 刘小云[1] 刘婷婷[1] 

机构地区：[1]杭州电子科技大学通信工程学院,杭州310018

出　　处：《计算机工程》2010年第7期270-272,共3页Computer Engineering

摘　　要：针对传统单载波频域均衡(SC-FDE)系统在复杂多径信道下误码率较高的问题,提出基于Turbo信道编码的SC-FDE系统。研究该系统在瑞利衰落信道下的误码率,比较不同Turbo译码方法和不同译码迭代次数下的系统性能。仿真结果表明,与无信道编码的SC-FDE系统相比,基于Turbo编码的SC-FDE系统误码率降低了5个数量级,在信噪比为10dB的情况下可以达到10-7,增强了数据传输的可靠性,更适合未来高速高效通信的要求。This paper proposes a Single-Carrier Frequency-Domain Equalizer（SC-FDE） system based on Turbo channel coding, and performance under the circumstance of the Rayleigh fading channel is analyzed. Moreover, comparisons among different decoding and different iteration times are given for the higher Bits Error Rate（BER） of the traditional SC-FDE system in the complex multipath channel. Simulation results show that the BER of SC-FDE system based on Turbo channel encoding can be reduced fivc orders of magnitude in comparison with SC-FDE without channel coding system, and BER of the proposed system can be reduced to 10-7 with a 10 dB signal to noise ratio. The reliability of SC-FDE system is enhanced. Hence, it is expected that the system can merge into the future high-speed and high-performance communications.

关 键 词：TURBO编码 单载波频域均衡 LOG—MAP译码算法 瑞利衰落信道 

分 类 号：TN911.72[电子电信—通信与信息系统]