Distributed Space-Time Code with Mutual Information Based Soft Information Relaying

作者：Karim Md Anisul^*; Yuan Jinhong; Chen Zhuo; Li Jun

来源：IEEE Communications Letters, 2013, 17(12): 2276-2279.

DOI：10.1109/LCOMM.2013.101813.131703

• Diversity order
• Alamouti space-time block code
• mutual information based soft forwarding

In this letter, we investigate a distributed space-time coded soft information relaying. In particular, we focus on mutual information based soft forwarding (MIF) scheme with Alamouti space-time block code. In order to achieve a full diversity order, we propose a weighted amplifying factor based on average soft noise variance instead of instantaneous one. The exact analytical expression for average soft noise variance is first derived. A tight upper bound of the average soft noise variance is also derived in closed-form. It is shown that the proposed distributed MIF Alamouti scheme can achieve a full diversity order, and outperforms various distributed Alamouti schemes reported in the literature.

• 出版日期2013-12
• 单位CSIRO