结合STBC的一种分层空时编码结构模型

A Layered Space-time Coding Model Combined with STBC

本文讨论了结合空时分组码(STBC Space Time Block Coding)的一种分层空时编码(Layered Space Time)结构模型。VBLAST(Vertical Bell Laboratories Layered Space Time)作为LST的一种结构,其性能受到最先译码信息符号准确度的影响,本文通过在VBLAST的首层采用STBC结构,从而增加了第一层信息符号的分集度。在接收端,采用组干扰抑制同时结合STBC和VBLAST译码,降低了接收机的复杂度提高了系统的性能。仿真结果表明结合STBC的VBLAST结构模型性能明显好于传统的VBLAST。

A layered space time model combined with Space-time Block Coding (STBC) is discussed. As one kind of Layered Space-time (LST) architecture, the Vertical Bell Laboratory Layered Space Time (VBLAST) performance is affected by the accuracy of the previously encoded symbols. According to the model proposed in this paper, STBC is adopted as the first layer of VBLAST as to increase the diversity of the first layer symbols. In the receiver, group interference suppression is combined with VBLAST and STBC decoding to decrease the complexity of receiver and improve the system performance. The simulation results show that the performance of the proposed model is better than the traditional VBLAST.