摘要
利用Turbo迭代原理,该文提出了一种迭代的维纳LMS联合信道估计和检测算法,该算法利用软映射和软解映射算法提供的软值信息,实现检测译码模块和信道估计模块之间的信息交换,通过WLMS信道估计和跟踪算法实现信道响应的逐符号更新。仿真结果表明,通过2次迭代,系统误码率性能已经基本收敛,而且在系统误码率低于10?3时,与理想信道估计性能相比,联合估计和检测算法性能信噪比损失仅为0.5-0.8dB。
A joint WLMS channel estimation and detection algorithm based Turbo iteration is proposed in this paper. Using the soft information provided by the soft mapping and demapping algorithms, the proposed algorithm achieve its information exchange between detection module and channel estimation module. The channel response is updated symbol by symbol by using the WLMS channel estimation and tracking algorithm. The simulation results show that the BER performance had converged after two iterative, and there is only 0.4-0.5dB performance losing compared with ideal channel estimation at a system BER of10^-3 .
出处
《电子与信息学报》
EI
CSCD
北大核心
2007年第1期152-156,共5页
Journal of Electronics & Information Technology
基金
江苏省自然科学基金(BK2003015)
国家863计划(2003AA12331007)资助课题
