SIMO含公零点信道的直接盲序列检测  

Direct Blind Sequence Detection of SIMO Channels with Common Zeros

作　　者：张志涌[1] BAI Erwei 

机构地区：[1]南京邮电学院电子系,江苏南京210003 [2]Iowa大学电气及计算机系

出　　处：《电子学报》2005年第4期671-675,共5页Acta Electronica Sinica

基　　金：国家自然科学基金(No60172058)

摘　　要：本文首先在BPSK字符集下提出了与经典迫零均衡有本质不同的ε均衡概念,给出了ε均衡器存在的充分必要条件.然后,本文借助接收数据阵补投影算子对待测发送序列向量的零化作用,把BPSK信号盲检测问题转化为带二值约束的二次规划问题.最后,通过复数量重新定义成实数量,本文把上述的ε均衡概念和盲检测算法成功地推广应用于QPSK复信道情况.仿真试验表明不管SIMO信道是否包含公零点,也不管零点是否在单位圆内,本文算法都表现出超越于子空间法和线性预报法的优良性能.For the Binary phase shift keying (BPSK) alphabet, this paper presents a novel concept of an Ε-equalization qualitatively different from the classical zero-forcing equalization, educes a necessary and sufficient condition for existence of the Ε-equalizer. The paper takes the complementary projection operator of a received data matrix as the annihilator of a transmitted sequence vector to be detected, and then formulates the blind detection problem of BPSK signals into a quadratic programming with binary constraints. Finally, the paper extends and applies the above Ε-equalization concept and blind detection algorithm successfully in the quaternary phase shift keying (QPSK) case with complex channels, by redefining a complex argument as a real one. Simulations demonstrate its superior performance to the subspace method and linear prediction method whether SIMO channels have common zeros or not and the zeros lie within the unit circle or not.

关 键 词：盲检测 可均衡条件 单输入多输出信道 BPSK QPSK 

分 类 号：TN911.23[电子电信—通信与信息系统]