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Recursive Nullspace Calculation for Multiuser MIMO Systems  

Joung, Jin-Gon (한국과학기술원 전자전산학과 디지털통신 연구실)
Lee, Yong-Hoon (한국과학기술원 전자전산학과 디지털통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.12A, 2007 , pp. 1238-1243 More about this Journal
Abstract
The computational complexity for the zero-forcing (ZF)-based multiuser (MU) multiple-input multiple-output(MIMO) preprocessing matrices can be immoderately large as the number of transmit antennas or users increases. In this paper, we show that the span of singular vector space of a matrix can be obtained from the singular vectors of the parted rows of that matrix with computational saving and propose a computationally efficient recursive-algorithm for achieving the ZF-based preprocessing matrices. Analysis about the complexities shows that a new recursive-algorithm can lighten the computational load.
Keywords
nullspace; multiple-input multiple-output: MIMO; multiuser;
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