Moon Ho Lee
Chonbuk National University, Korea (South)
Title : Fast Block Diagonal-wise Jacket Matrices for MIMO Mobile Wireless Channels
Abstract :


Block diagonalization (BD) is a linear precoding technique for multiuser multi-input multi-output (MIMO) broadcast channels such that it completely eliminates the multiuser interference, but it is computationally inefficient. BD supports multiple data streams per user by using precoders orthogonal to the channel of other users such that inter-user interference is cancelled. This linear precoding scheme also achieves near to the sum capacity of MIMO broadcast channels. Let be a  matrix, then it is called a Jacket matrix when . That is, the inverse of the Jacket matrix can be determined by its element-wise inverse. In this abstract, we propose new matrix decomposition, called the block diagonal Jacket matrices decomposition and extend the block diagonal channel decomposition with which the MIMO broadcast channel capacity can be achieved.We also discus block diagonal Jacket matrices decomposition because it is ordinary inverse matrix. Jacket matrices are very fast algorithm, so we can calculate complexity easily. In multiuser broadcast channels, unlike the single-user MIMO, cooperation is not permitted between different users. However, receive equalization is possible for each user. There have been several schemes proposed for low complexity MIMO broadcast communications.

 Nowadays, communication environment changes to 4G mobile system employing MIMO such as multiuser channel. Coordinated multi-point transmission and reception (CoMP) technique is a new promising interference cancelling scheme which has been adopted in LTE-Advanced. For the next generation of wireless communication networks, CoMP is mostly required to reduce inter-cell interference (ICI). It also increases the intra cell edge user throughput and improves the coverage. Recently, most research works based on precoding with feedback schemes mainly focus on explicit feedback in the downlink CoMP. We have investigated MIMO CoMP based on block-wise inverse Jacket matrix.

Biography :

 Moon Ho Lee is a professor and former chair of the Department of Electronics Engineering in Chonbuk National University, Korea. He received the Ph.D. degree from Chonnam National University, Korea in 1984, and from the University of Tokyo, Japan in 1990, both Electrical Engineering, He was in University of Minnesota, U.S.A, from 1985 to 1986 as a post-doctor. He has been working in Namyang MBC broadcasting with chief engineer from 1970 to 1980, after then he joined to Chonbuk National University as a Professor. Dr. Lee has made significant original contributions in the areas of mobile communication code design, channel coding, and multi-dimensional source and channel coding. He has authored 41 books, 160 SCI papers in international journals, and 240 papers in domestic journals, and delivered 350 papers at international conferences. Dr. Lee is a member of the National Academy of Engineering in Korea and a Foreign Fellow of the Bulgaria Academy of Sciences. He is the inventor of Jacket
Matrix and it in Wikipedia was cited over 71,151 times, January 6, 2013.
He has specially published Jacket Matrices 3 books as belows:
Ø Jacket Matrices-Construction and Its Applications for Fast Cooperative Wireless Signal Processing, LAP LAMBERT Academic publishing, Germany, 2012.
Ø Jacket Matrices, Youngil, Korea, 2010.
Ø Jacket Matrix and Its Fast Algorithms for Cooperative Wireless Signal Processing, Youngil, Korea, 2010.


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