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A method for eliminating non-orthogonal space-time block coding self-interference item based on matrix rotation

A space-time block code, non-orthogonal technology, applied in the field of space-time transmit diversity, can solve problems such as increasing system complexity and inability to set self-interference terms to zero.

Inactive Publication Date: 2009-02-18
XI AN JIAOTONG UNIV
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Problems solved by technology

There are two shortcomings of this C-OTD scheme. First, if there is an error in the estimate of the channel state information at the receiving end, the self-interference item cannot be effectively zeroed; second, it is necessary to establish a channel from the receiving end to the transmitting end feedback link, adding to the complexity of the system

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  • A method for eliminating non-orthogonal space-time block coding self-interference item based on matrix rotation
  • A method for eliminating non-orthogonal space-time block coding self-interference item based on matrix rotation
  • A method for eliminating non-orthogonal space-time block coding self-interference item based on matrix rotation

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Embodiment Construction

[0044] Orthogonal space-time block codes based on matrix rotation

[0045] Orthogonal space-time block codes based on matrix rotation, the idea is to eliminate the self-interference term brought by non-orthogonality through the method of Givens rotation, so as to construct orthogonal space-time block codes.

[0046] Channel correlation matrix for non-orthogonal space-time block codes Δ 4 = H H H = α 0 β 0 0 α 0 β β 0 ...

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Abstract

The invention is a matrix rotation based method for eliminating self-interference of a nonorthogonal space-time packet code, in view of the problem that there are self-interference items in the channel correlation matrix of nonorthogonal (or quasi-orthogonal) space-time packet code, adopting Givens rotation twice. Thus, one hand, it can effectively eliminate the self-interference items and rotates channel matrix into orthogonal matrix. During space-time transmit diversity, the maximum advantage caused by the channel matrix being an orthogonal matrix is that it can make linear decoding at receiving end, largely reducing decoding complexity. And at the same time it make the packet code corresponding to the channel matrix have an orthogonal structure, accordingly able to obtain maximum transmitting speed, partial diversity gain and receiving-end linear decoding.

Description

technical field [0001] The invention belongs to a space-time transmit diversity technology in a multi-antenna wireless communication system, in particular to a method for eliminating self-interference items of non-orthogonal space-time block codes based on matrix rotation. Background technique [0002] Space-Time Coding is a new coding and signal processing technology in wireless communication. It uses multiple transmitting and receiving antennas to transmit information, which can greatly improve the information capacity of wireless communication systems. At present, research on space-time coding is mainly carried out around Space-Time Trellis Code (abbreviated as STTC) and Space-Time Block Code (abbreviated as STBC). Space-time trellis codes increase exponentially due to their decoding complexity as the transmission rate increases [V.Tarokh, N.Seshadri, A.R.Calderbank, Space-time codes for high datarate wireless communication: Performance analysis and codeconstruction, IEEE...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/04H04J13/02H04B1/10H04B7/04
Inventor 王磊朱世华王君
Owner XI AN JIAOTONG UNIV
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