Method for Eliminating Depolarization Effect Interference in Dual-polarization and Dual-frequency Fusion System
A dual-polarization and depolarization technology, applied in transmission systems, baseband systems, digital transmission systems, etc., can solve problems such as difficulty in implementation, high complexity, and lack of consideration of antenna deployment, reducing scanning complexity, The effect of improving alignment speed and improving MIMO diversity multiplexing performance
Active Publication Date: 2022-06-03
XIDIAN UNIV
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Although this method gives a scheme of how to select beams based on codebook and spectral efficiency after channel estimation, it does not take into account the actual deployment of antennas, resulting in the final selection of beams in the millimeter wave radio frequency band through digital and analog domain matrices. It can only be obtained after jointly calculating the spectral efficiency, which is very complicated. It is difficult to realize in practice, and it is difficult to guarantee the multiplexing gain of mmWave MIMO
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[0033] The intermediate frequency module is used for up-conversion or down-conversion signals.
[0035] The millimeter-wave radio frequency module includes a group of millimeter-wave dual-polarized antennas placed at the same point.
[0042]
[0043]
[0044] Wherein: []
[0045] h
[0046] h
[0048]
[0049]
[0051] h
[0052] Step 2: Estimate the signal arrival angle and the cross-polarization ratio according to the channel estimation matrix.
[0054]
[0055]
[0057]
[0058]
[0061]
[0062]
[0065]
[0066]
[0069]
[0070] Wherein, || ||
[0071] Step 3: The base station selects a working frequency band.
[0074] On the contrary, switch to the millimeter wave frequency band, perform steps 4-7, and notify the user of the selection result.
[0079] 4.2) The user is at θ
[0081]
[0085] Step 5: According to the optimal beam pair, perform millimeter wave band channel detection.
[0089]
[0090]
[0092] represents the i-th column of the matrix, []
[0093] represents the...
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The invention discloses a method for eliminating the depolarization effect interference of a dual-polarization dual-frequency fusion system, which mainly solves the problem of low MIMO diversity multiplexing performance caused by the depolarization effect of the existing dual-polarization antenna. The scheme is: the base station and the user end perform channel estimation in the C-band respectively during the initial access; the base station estimates the signal angle of arrival and the cross-polarization ratio according to the channel estimation matrix to select the working frequency band; The angle of arrival of the signal selects the corresponding narrow beam set and performs beam scanning to obtain the optimal beam pair, and then conducts millimeter-wave band channel detection according to the optimal beam pair; the base station selects the precoding method according to the millimeter-wave cross-polarization The encoding matrix is multiplied by the millimeter-wave channel estimation matrix to eliminate the interference of the depolarization effect, and obtain the final equivalent channel matrix at the receiving end. The invention improves the dual-polarization MIMO diversity multiplexing performance and millimeter-wave beam alignment speed, and can be used in a dual-polarization dual-frequency fusion system.
Description
Method for Eliminating Depolarization Effect Interference of Dual Polarization Dual Frequency Fusion System technical field The invention belongs to the technical field of mobile communication, particularly a kind of method for eliminating depolarization effect interference, available for dual-polarization and dual-frequency fusion systems. Background technique The dual-frequency fusion system is composed of the C-band and the millimeter-wave frequency band, wherein the C-band has mature technology and complete infrastructure. It has the characteristics of strong signal penetration ability and large coverage. Millimeter wave has the advantages of wide spectrum, high stability and good directivity. Therefore, it has become one of the frequency bands used by the fifth-generation mobile communication 5G, and it has also become a hot spot of current research. Dual-frequency fusion system can Make full use of the advantages of the two frequency bands to improve the spee...
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IPC IPC(8): H04B7/0413H04B7/0456H04B7/06H04B7/08H04L25/02
CPCH04B7/0413H04B7/0456H04B7/0695H04B7/086H04L25/0224H04L25/0242Y02D30/70
Inventor 李晓辉李颖刘佳文石明利
Owner XIDIAN UNIV