基于OSTBC的有限反馈预编码设计

Limited feedback precoding design for orthogonal space-time block codes

D.J.Love等在文献[7]中提出了基于正交空时码的有限反馈多天线系统,并且设计了至今保持最优性能的码本。这一系统已经被IEEE国际标准所采用。针对这一系统,本文基于文献[16]中的预编码设计准则,提出了新的预编码设计方案。相对于Love等在[7]中提出的码本,本文提出的新的码本在性能上有了提高。并且本文新的码本还具有快速选码方案,在其性能损失较小的情况下,有效降低了选码复杂度。

Based on Orthogonal Space-Time Block Codes（OSTBC）,D.J.Love etc introduce a limited feedback MIMO system.For this system,based on analysis of performance,they also propose a designing criterion of precodebooks and design the practical precodebooks that keep the best-known performance.The system is adopted by IEEE international standards.For this system,this paper proposes a new designing scheme of precodebooks based on another designing criteria.Simulations show that precodebooks obtained by our scheme outperform D.J.Love’s scheme.Furthermore,our new codebooks have a fast encoding algorithm,which can effectively reduce the encoding complexity in the case of the performance lose is limited.