LTE-A non-codebook beam forming method based on user satisfaction

A beamforming method and user satisfaction technology, applied in space transmit diversity, diversity/multi-antenna systems, etc., can solve the problem of low fairness satisfaction, achieve satisfaction and fairness, improve user fairness, The effect of improving system performance

Active Publication Date: 2014-02-19
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of fairness between different users and low satisfaction level of each user while improv

Method used

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  • LTE-A non-codebook beam forming method based on user satisfaction
  • LTE-A non-codebook beam forming method based on user satisfaction
  • LTE-A non-codebook beam forming method based on user satisfaction

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Example Embodiment

[0019] Specific implementation mode 1: Combination figure 1 To explain this embodiment, the LTE-A non-codebook beamforming method based on user satisfaction described in this embodiment includes the following steps:

[0020] Step 1: Use the existing SLNR beamforming method to obtain the corresponding beamforming matrix;

[0021] Step 2: Under the beamforming matrix obtained in step 1, obtain the SINR value and satisfaction value of each user;

[0022] Step 3: Use the obtained SINR value and satisfaction value to correct and weight the beamforming matrix obtained in step 1 to obtain a corrected weighted beamforming matrix;

[0023] Step 4: For GBR services and non-GBR services, the modified weighted beamforming matrix obtained in step 3 is further modified with different weights to obtain the optimal beamforming matrix.

Example Embodiment

[0024] Specific embodiment 2: This embodiment is a further limitation of the LTE-A non-codebook beamforming method based on user satisfaction described in specific embodiment 1.

[0025] In the first step, the method of using the existing SLNR beamforming method to obtain the corresponding beamforming matrix is:

[0026] When the matched filter receiver is configured on the user side and the user's transmit power has been normalized, the SLNR of user k is expressed as:

[0027] J ( W k ) = | | H k W k | | F 2 N R σ k 2 + X i = 1 , i ≠ k K | | H i W k | | F 2 = tr ( W k H H k H H k W k ) tr ( W k H ( H ‾ k H H ‾ k + N R σ k 2 I N T ) W k )

[0028] Where W k Is the beamforming matrix of user k, Where H i Is the channel matrix of user i, Re...

Example Embodiment

[0031] Specific embodiment 3: This embodiment is a further limitation of the LTE-A non-codebook beamforming method based on user satisfaction described in specific embodiment 1.

[0032] In step 2, under the beamforming matrix obtained in step 1, the method to obtain the SINR value of each user is:

[0033] The SINR value of user k is:

[0034] SINR k = | | H k W k | | F 2 N R σ k 2 + X i = 1 , i ≠ k K | | H k W i | | F 2

[0035] Where W k Is the beamforming matrix of user k, H i Is the channel matrix of user i, Represents the Frobenius norm of matrix A, N R Is the number of receiving antennas at the user end, Is the noise power of user k.

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Abstract

The invention provides an LTE-A non-codebook beam forming method based on user satisfaction, and belongs to the technical field of beam forming in a mobile communication system. The problems that even though an existing beam forming method improves performance of the system, justification among different users and corresponding satisfaction of the users are low are solved. The method comprises the steps that step one, a corresponding beam forming matrix is obtained through an existing SLNR beam forming method; step two, based on the beam forming matrix obtained in the step one, SINR values and satisfaction values of all users are obtained; step three, through the obtained SINR values and the satisfaction values, amended fusion is carried out on the beam forming matrix obtained in the step one, and a beam forming matrix after amended fusion is obtained; step four, specific to the GBR service and the non-GBR service, the beam forming matrix after amended fusion in the step three is further amended through different weights to obtain the optimal beam forming matrix. The method is used for multi-user beam forming.

Description

technical field [0001] The invention belongs to the technical field of beamforming in a mobile communication system, in particular to an LTE-A non-codebook beamforming method based on user satisfaction. Background technique [0002] In the LTE-A standard, MIMO technology has been further enhanced, and it can support up to 8 layers of downlink and 4 layers of uplink transmission mode. In addition, technologies such as multi-user MIMO and beamforming have also been further developed and applied. In the uplink of LTE-A, the joint detection at the eNodeB side can be used to reduce the interference between users; and considering the equipment capabilities of the downlink UE, the interference between users can be suppressed mainly through precoding or beamforming technology, where The non-codebook beamforming method has received more attention in recent years because it can take advantage of the reciprocity of the channel in TDD mode to reduce the signaling overhead of channel est...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04B7/08
Inventor 吴宣利孙陆宽吴玮李卓明赵婉君付楠楠
Owner HARBIN INST OF TECH
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