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ZHANG Jian, LIU Yuan-an, XIE Gang, MAO Jun-ling, LIU Fang. Low Complexity Block Diagonalization Algorithm for Multiuser MIMO Downlink Systems[J]. Journal of University of Electronic Science and Technology of China, 2011, 40(5): 662-666. doi: 10.3969/j.issn.1001-0548.2011.05.005
Citation: ZHANG Jian, LIU Yuan-an, XIE Gang, MAO Jun-ling, LIU Fang. Low Complexity Block Diagonalization Algorithm for Multiuser MIMO Downlink Systems[J]. Journal of University of Electronic Science and Technology of China, 2011, 40(5): 662-666. doi: 10.3969/j.issn.1001-0548.2011.05.005
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Low Complexity Block Diagonalization Algorithm for Multiuser MIMO Downlink Systems

doi: 10.3969/j.issn.1001-0548.2011.05.005
  • 1.

    Key Laboratory of Universal Wireless Communications of Ministry of Education,Beijing University of Posts and Telecommunications Haidian Beijing 100876

  • Received Date: 2009-11-08
  • Rev Recd Date: 2011-05-03
  • Publish Date: 2011-10-15
  • A low complexity block diagonalization precoding algorithm is proposed for multiuser multiple-input multiple-output (MIMO) downlink systems. It is proved that the algorithm can achieve the same sum capacity with that of the traditional block diagonalization one. The algorithm improves the existing zero forcing method. By performing Gram-Schmidt orthogonalization to zero forcing beams, the algorithm can achieve fast global block diagonalization of the equivalent downlink channel, thus further obtaining the precoders. Avoiding matrix singular value decomposition required when calculating null space in the traditional block diagonalization algorithm, the computational complexity of the proposed algorithm is greatly reduced by about 50%.
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  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

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Low Complexity Block Diagonalization Algorithm for Multiuser MIMO Downlink Systems

doi: 10.3969/j.issn.1001-0548.2011.05.005
  • 1. Key Laboratory of Universal Wireless Communications of Ministry of Education,Beijing University of Posts and Telecommunications Haidian Beijing 100876
  • Received Date: 2009-11-08
  • Rev Recd Date: 2011-05-03
  • Publish Date: 2011-10-15

Abstract: A low complexity block diagonalization precoding algorithm is proposed for multiuser multiple-input multiple-output (MIMO) downlink systems. It is proved that the algorithm can achieve the same sum capacity with that of the traditional block diagonalization one. The algorithm improves the existing zero forcing method. By performing Gram-Schmidt orthogonalization to zero forcing beams, the algorithm can achieve fast global block diagonalization of the equivalent downlink channel, thus further obtaining the precoders. Avoiding matrix singular value decomposition required when calculating null space in the traditional block diagonalization algorithm, the computational complexity of the proposed algorithm is greatly reduced by about 50%.

ZHANG Jian, LIU Yuan-an, XIE Gang, MAO Jun-ling, LIU Fang. Low Complexity Block Diagonalization Algorithm for Multiuser MIMO Downlink Systems[J]. Journal of University of Electronic Science and Technology of China, 2011, 40(5): 662-666. doi: 10.3969/j.issn.1001-0548.2011.05.005
Citation: ZHANG Jian, LIU Yuan-an, XIE Gang, MAO Jun-ling, LIU Fang. Low Complexity Block Diagonalization Algorithm for Multiuser MIMO Downlink Systems[J]. Journal of University of Electronic Science and Technology of China, 2011, 40(5): 662-666. doi: 10.3969/j.issn.1001-0548.2011.05.005
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