Turbo-MIMO系统的质点滤波器检测

最近质点滤波器被提出用作贝尔实验室分层空时（BLAST）结构的硬判决检测方法。给出了BLAST结构 的等价白化滤波器输出（WFO）模型和等价动态状态空间模型（DSSM）,由DSSM推导出BLAST结构的软判决质 点滤波器检测方法一随机M算法,最后将该方法应用于Turbo-MIMO系统并给出仿真结果。试验结果表明,和未 编码结构相比,当系统谱效率为4bit/（S.Hz^-1）时,采用该检测方法的编码系统有大约11.58dB的增益;谱效率为 84bit/（S.Hz^-1）时,系统增益约为)8dB。     

Iteration-stopping scheme of turbo receiver in turbo-MIMO systems

The iteration-stopping scheme of turbo receiver, consisting of an inner multiple-input multiple-output （MIMO） detector and an outer turbo decoder, was studied in this paper. In the inner MIMO detector, only the reliabilities of bits in those channel slots which included unreliable information bits were updated when the outer turbo code was a systematical one. In conjunction with the trigger events for stopping the turbo decoding, an iteration-stopping scheme of turbo receiver was proposed. Simulation results show that the proposed scheme has lower complexity, but almost the same error performance compared to the scheme with predetermined maximum iterations.     

Turbo-MIMO系统的质点滤波器检测

最近质点滤波器被提出用作贝尔实验室分层空时(BLAST)结构的硬判决检测方法。给出了BLAST结构的等价白化滤波器输出(WFO)模型和等价动态状态空间模型(DSSM),由DSSM推导出BLAST结构的软判决质点滤波器检测方法-随机M算法,最后将该方法应用于Turbo-MIMO系统并给出仿真结果。试验结果表明:和未编码结构相比,当系统谱效率为4 bit/(S.Hz-1)时,采用该检测方法的编码系统有大约11.5 dB的增益;谱效率为8 bit/(S.Hz-1)时,系统增益约为8 dB。