Patent
Pre-coding method for multi-user MIMO system
Lihua Li,Ping Zhang,Xiangchuan Gao,Lei Song,Hualei Wang,Chaowei Wang +5 more
- 09 Mar 2011
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TL;DR: In this article, the authors proposed a pre-coding method for a multi-user MIMO (multi-input multi-output) system, which comprises the following steps of: acquiring a channel matrix of each user of the system by feedback or TDD (time division duplex) system channel reciprocity; acquiring an orthogonal vector base matrix according to a channel pseudo-inverse sentence of each UEs; acquiring a precoding merging matrix of UEs according to the channel matrixof each UE and the optimal merging matrix.
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Abstract: The invention provides a pre-coding method for a multi-user MIMO (multi-input multi-output) system. The method comprises the following steps of: acquiring a channel matrix of each user of the system by feedback or TDD (time division duplex) system channel reciprocity; acquiring a channel pseudo-inverse matrix of each user of the system according to the least square error criterion; acquiring an orthogonal vector base matrix according to a channel pseudo-inverse sentence of each user of the system; acquiring a pre-coding merging matrix of each user of the system according to the channel matrixof each user of the system and the channel pseudo-inverse orthogonal vector base matrix by combining a max signal to leakage and noise ratio criterion; and acquiring a pre-coding matrix of each user of the system according to the orthogonal vector base matrix of each user of the system and the optimal merging matrix. The scheme can effectively reduce the calculation complexity of the scheme at the same time of keeping the performance of the original MSLNR (max signal to leakage and noise ratio) criterion scheme, the performance of the scheme is superior to that of the traditional diagonal scheme, and the scheme has lower calculation complexity and reduces the operating complexity of a base station.
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Citations
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Patent
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Eric Ojard,Sirikiat Lek Ariyavisitakul +1 more
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Patent
Precoding method and apparatus for multi-input multi-output system
Shanghong Li,Ping Zhang,Peng Cao,Ningbo Zhang,Guixia Kang +4 more
- 04 Jul 2012
TL;DR: In this article, a pre-coding method for multi-input and multi-output (MIMO) systems and a device thereof is presented, which consists of: according to CSI of previous time, predicting CSI of the sending time; according to the predicted CSI, acquiring a precoded vector; and according to sending data and the pre-coded vector, generating a sending signal is generated.
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