合作SCC系统的总LS信号检测方法  

Total Least Squares signal detection for cooperation SCC system

作　　者：孙山林[1,2] 

机构地区：[1]天津大学电子信息工程学院,天津300072 [2]桂林航天工业高等专科学校,广西桂林541004

出　　处：《计算机工程与应用》2010年第8期29-31,共3页Computer Engineering and Applications

基　　金：国家自然科学基金Grant No.60972054;广西高校优秀人才资助计划(No.桂教人才0842)~~

摘　　要：为了克服已有信道估计算法无法及时跟踪信道变化的缺陷,在合作OFDM系统中引入了总LS(TotalLeastSquares,TLS)信号检测方法来实现信道状态信息估计。TLS方法同时考虑了信道噪声和信道时变特性,能够对信道和信号的变化同时进行跟踪估计。因为充分考虑了信道的时变性,且复杂度较低、收敛速度较快,所以在高速移动通信环境下,TLS方法能够很好地估计信道信息。仿真结果表明,与传统的LS法和ML法相比,该算法在改善误码性能方面优势明显。When the environment is under high-speed,there will be a large Doppler because of time-vary channel.So,Channel State Information （CSI） must be estimated at any time.Aiming at this problem,the total least squares is introduced to estimate CSI.Considering channel noise and the character of time-varying of channel,this algorithm can estimate not only received signal but also channel state.At the same time,it can track them,too.In time-varying ehannel,TLS method has the advantages of lower complexity and fast convergence.Compared with LS and ML algorithms,TLS has better BER performance.The simulation results show that TLS method is effective in channel estimate in wireless communication system.

关 键 词：正交频分复用 合作通信 信道状态控制 总最小二乘 信道状态信息 

分 类 号：TN911[电子电信—通信与信息系统]