Interference elimination method based on Givens conversion block diagonalization precoding

An interference elimination and precoding technology, which is applied in wireless communication precoding and communication fields, can solve problems such as poor signal reception quality, high user signal error rate, and high computational complexity, so as to reduce computational complexity and overcome bit errors The effect of higher rate and improved coding efficiency

Inactive Publication Date: 2017-05-31
XIDIAN UNIV
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Problems solved by technology

However, the disadvantage of this method is that the computational complexity is still high when calculating the pseudo inverse of the null space of the user channel matrix
However, the d...

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  • Interference elimination method based on Givens conversion block diagonalization precoding
  • Interference elimination method based on Givens conversion block diagonalization precoding
  • Interference elimination method based on Givens conversion block diagonalization precoding

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] Refer to attached figure 1 , the specific steps of the present invention are further described in detail.

[0039] Step 1, estimate the channel matrix involved in precoding.

[0040] Using the channel estimation method in the multi-user MIMO system, the downlink channel matrix of each user is estimated to form a joint user channel matrix.

[0041] Perform conjugate transposition on the joint user channel matrix to obtain the joint user channel matrix after the conjugate transposition.

[0042] Step 2, performing QR decomposition on the joint user-channel matrix after conjugate transposition.

[0043] QR decomposition is performed on the joint user-channel matrix after conjugate transposition to obtain an orthogonal matrix and an upper triangular matrix used to represent the joint user-channel matrix.

[0044] Step 3, find the pseudo-inverse of the ...

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Abstract

The invention discloses an interference elimination method based on Givens conversion block diagonilization precoding. The method specifically comprises the first step of estimating a channel matrix which participates the precoding; the second step of conducting QR resolving on the channel matrix of a united user after conjugating transposition; the third step of resolving pseudo-inverse of the channel matrix of the united user; the fourth step of constructing the first half of precoding matrix; the fifth step of constructing the second half of the precoding matrix; the sixth step of obtaining the precoding matrix of final union. According to the interference elimination method based on the Givens conversion block diagonilization precoding, orthogonal matrix with better orthogonality is obtained, thus more accurate standard orthogonal basis of user channel matrix null space is obtained, and finally the needed precoding matrix of the final union is obtained. The interference elimination method based on the Givens conversion block diagonalization precoding can be used in a multi-user communication system to eliminate interference among users and improve the quality of signals received by the users and the stability of the system.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to an interference elimination method based on Givens transform block diagonal precoding in the technical field of wireless communication precoding. The invention can be used in a multi-user communication system to eliminate inter-user interference and improve the quality of signals received by users and the stability of the system. Background technique [0002] Precoding technology refers to preprocessing the mixed signal before the downlink base station broadcasts the signal to multiple users, so that the user receiving end can easily separate the useful signal from the mixed receiving signal, reducing or eliminating the interference between users . Since the processing capability of the base station is much larger than that of the user end, the precoding technology also releases the processing pressure of the user end. [0003] Precoding technologies are generally c...

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Application Information

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IPC IPC(8): H04L25/03H04L25/02
CPCH04L25/0204H04L25/0391
Inventor 高明孙成越葛建华刘刚高洋付少忠
Owner XIDIAN UNIV
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