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Interpolation-based Precoding Approximation Algorithm for Low Complexity in Multiuser MIMO-OFDM Systems  

Lim, Dong-Ho (영남대학교 정보통신공학과 광대역우선통신연구실)
Kim, Bong-Seok (영남대학교 정보통신공학과 광대역우선통신연구실)
Choi, Kwon-Hue (영남대학교 정보통신공학과 광대역우선통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.11A, 2010 , pp. 1027-1037 More about this Journal
Abstract
In this paper, we propose the linear interpolation-based BD (Block Diagonalization) precoding approximation algorithm for low complexity in downlink multiuser MIMO-OFDM (Multiple-input Multiple-output Orthogonal Frequency Division Multiplexing) systems. In the case of applying the general BD precoding algorithm to multiuser MIMO-OFDM systems, the computational complexity increases in proportional to the number of subcarriers. The proposed interpolation-based BD precoding approximation algorithm can be achieved similar SER performance with general BD algorithm and can decrease the computational complexity. It is proved that proposed algorithm can achieve the significantly decreased computational complexity by computer simulation.
Keywords
interpolation; BD; Multiuser; MIMO-OFDM; Complexity;
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