【摘要】 该文针对频率选择性信道下的Alamouti字时分组码，提出了一种在接收端未知信道信息的情况下的半盲的递推解码方法。该方法基于子空间方法，利用少量的导频符号和空时分组码的结构，递推地同时完成信道均衡和解码，直接解得信息符号。与已有的按块批处理的盲解码方法相比，递推方法因为在递推过程中利用已经判得的过去的信息符号，能够方便地进行性能与运算量的折衷。仿真结果验证了方法的有效性。更多还原

【Abstract】 In the paper, assuming frequency-selective channel, a recursive semi-blind joint equalization and decoding method for Alamouti space-time block code is proposed. Based on subspace-based blind equalization method, the proposed method sequentially decodes Alamouti space-time block code without channel state information by exploiting the structure of the space-time block code and a few pilot symbols. In contrast with previous block-based blind decoding methods, the proposed method is more amicable to allowing tradeoff between performance and complexity. Simulation results demonstrate the effectiveness and flexibility of the proposed method.更多还原