【摘要】 提出一种基于旋转不变子空间的垂直分层空时码及其直接信号检测算法 .通过构造范得蒙分层空时码 ,可将阵列信号处理的思想应用到空时码中 ,利用空时相关阵的特征结构 ,从空时信号的旋转不变子空间中解得发射序列 ,实现了无需信道信息和导频的信号检测 ,有效地节约了估计信道时占用的频带资源 .仿真结果表明 ,该算法在不知信道信息的情况下十分接近使用准确信道信息的相干检测器更多还原

【Abstract】 On the symbol detection of layered space time codes, it is assumed that the perfect channel estimations are available at the receiver. A subspace based vertical layered space time code is proposed for symbol detection when neither the transmitter nor the receiver has access to channel state information. It addresses the space time code from both an array signal processing and a space time coding perspective. With the special structure of Vandermonde layered space time code and by exploiting the eigen structure of the space time correlation matrix, the rotational invariant subspace of signal is worked out and a closed form symbol estimation is accomplished from the subspace without training symbols and channel state information, which increases spectral efficiency. The Monte Carlo simulations show that the performance of this algorithm can approach that of the detector with the perfect channel state information.更多还原