A method and device for suppressing co-channel interference
A technology of co-channel interference and second-order statistics, applied in the field of communication, can solve problems such as inability to effectively suppress co-channel interference, different statistical characteristics of co-channel interference noise signals, and mismatching of co-channel interference noise signals
Active Publication Date: 2018-06-26
HONOR DEVICE CO LTD
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[0003] At present, the second-order statistics R of the co-channel interference noise signal are usually calculated by the received signal at the reference signal position in the selected time-frequency domain and the corresponding channel estimation value uu The premise of this estimation method is to assume that the statistical characteristics of the co-channel interference noise signal at each reference signal position are the same. However, for some more complex interference scenarios, the statistical characteristics of the co-channel interference noise signal at each reference signal position characteristics are not the same, which makes the estimated second-order statistics R uu The matrix does not match the actual co-channel interference noise signal, so co-channel interference cannot be effectively suppressed
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[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0046] The embodiment of the present invention discloses a method and device for co-channel interference suppression, which can improve the second-order statistic R actually used for co-channel interference suppression uu The degree of matching between the matrix and the actual co-channel interference noise signal can effectively suppress the co-channel interference. Each will be described in detail below.
[0047] see figure 1 , figure 1 It is a schematic ...
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The embodiment of the present invention discloses a method and device for suppressing co-channel interference, the method includes first estimating the resource block according to the received signal at the reference signal position of each resource block in consecutive N resource blocks and the corresponding channel estimation value The second-order statistic Ruu matrix of the same-channel interference noise signal to obtain N second-order statistic Ruu matrices, and then judge whether there is a second-order statistic Ruu matrix that needs to be corrected in the N second-order statistic Ruu matrices, if not If it exists, calculate the average second-order statistic Ruu matrix of the above N second-order statistic Ruu matrices, and perform co-channel interference suppression on the received signal of the user based on the average second-order statistic Ruu matrix. It can be seen that the implementation of the embodiment of the present invention improves the matching degree of the second-order statistic Ruu matrix actually used for co-channel interference suppression and the actual co-channel interference noise signal and effectively suppresses co-channel interference.
Description
technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for suppressing co-channel interference. Background technique [0002] In an LTE (Long Term Evolution, Long Term Evolution) system, different users in the same cell can implement multiple access through OFDMA (Orthogonal Frequency Division Multiple Access, Orthogonal Frequency Division Multiple Access) technology, so as to improve the utilization rate of spectrum resources. However, users in adjacent cells may use the same spectrum resource. When the base station transmits downlink data, the received signal of the user in a certain cell will be affected by the received signal of the user in the adjacent cell using the same spectrum resource (also known as "same-frequency Interference signal") interference, this interference is called CCI (Co-Channel Interference, co-channel interference). The most commonly used technology to solve co-channel interferen...
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IPC IPC(8): H04L5/00H04W72/04
CPCH04L25/0204H04L25/03006H04W72/541
Inventor 韩朔高振兴
Owner HONOR DEVICE CO LTD