连续衰落信道下差分空时DFD  

DFD-based DSTM in Continuous Fading Channel

作　　者：李东伟[1] 程智慧[1] 韩力[1] 练岚香[1] 

机构地区：[1]北京理工大学,北京100081

出　　处：《通信技术》2011年第2期10-12,15,共4页Communications Technology

摘　　要：一种适用于连续衰落信道的非对角差分空时调制方法被提出,该方法在线性预测的基础上,通过采用判定反馈检测技术,不仅解决了对角阵DSTM的性能衰减问题,而且通过在多符号差分矩阵中插入判定反馈符号,解决了非对角DSTM的性能衰减问题,同时降低了计算复杂度。仿真结果表明,这种新机制有效改善了DSTM的性能,适用于对角阵星座图,同时也适用于非对角阵星座图。A new DSTM is proposed,which adopts DFD（decision feedback detection） based on linear prediction,and thus overcomes the performance degradation of diagonal constellation in continuously fading channels.The new scheme,by inserting the decision-feedback symbols into the matrix of multiple-symbol differential detection,achieves low complexity and overcomes the performance degradation of non-diagonal constellation.The simulations show that this new mechanism could improve the performance of DSTM and is suitable for both diagonal generator constellation and non-diagonal generator constellation.

关 键 词：判定反馈检测(DFD) 连续衰落信道 差分空时调制(DSTM) 

分 类 号：TN911[电子电信—通信与信息系统]