供应链知识编码化中的密码本研究

为解决供应链情境中密码本的生成难题,在对供应链知识相关文献进行分类研究的基础上,提出了一种借鉴成熟的供应链管理模型形成密码本的观点.以目前在一定程度上已得到了理论认同和实践验证为标准,选择SOOR模型作为编码供应链知识的密码本蓝本,并依据有效密码本所应具备的支持知识转移和节约编码成本这两个特征,对SOOR模型从内容安排、体系结构和发布组织三个方面进行分析,论证了这种选择的合理性.     

A novel MMSE based codebook construction for MIMO precoded spatial multiplexing with limited feedback

This paper deals with the design and performance analysis of the transmission precoder optimization for multiple-input multiple-output (MIMO) systems with limited feedback of channel state information (CSI). We assume that the receiver can get perfect channel knowledge by channel estimation while the transmitter only has partial channel knowledge from limited feedback. We present a minimum mean square error (MMSE) criterion based codebook construction algorithm for MIMO pre- coded spatial multiplexing systems under a specific average power constraint. The optimal transmitter structure is employed in this paper. Simulation results show that the MMSE criteria based codebook construction algorithm with hybrid design of power allocation and precoding can achieve better performance than that of equal power allocation based codebook of previous research.