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Interference rejection combining method and system

A technology of interference suppression and interference plus noise, applied in the field of communication, which can solve the problems of poor covariance matrix effect and inability to obtain information.

Active Publication Date: 2010-06-23
WUHAN HONGXIN TELECOMM TECH CO LTD
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  • Description
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Problems solved by technology

But in fact, this information cannot be obtained in the IRC system
The current approximation method can directly use the autocorrelation matrix of the received signal to approximate the covariance matrix of interference and noise, but the estimated noise plus interference covariance matrix is ​​not effective.

Method used

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Embodiment Construction

[0087] The purpose of the present invention is to provide an interference suppression combining method, solve the noise plus interference matrix covariance matrix, and then implement the IRC method to suppress the interference, that is, obtain a set of IRC processing methods that are feasible in the uplink channel.

[0088] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0089] In order to facilitate those skilled in the art to understand the application environment of the present invention, the following combination figure 2 Be specific.

[0090] see figure 2 , which is a diagram of inter-cell user interference in the uplink direction.

[0091] UE1 (first wireless terminal) sends signals to base station 1 at the edge of cell 1 and cell 2 . In the uplink direction, there is one t...

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Abstract

The invention relates to an interference rejection combining method. The method comprises the following steps: calculating interference plus noise signals received by ant amount of antennas at the receiving end of a base station side, on the subcarrier of pilot symbols in a physical resource block respectively; calculating an interference plus noise covariance matrix in the physical resource block according to the interference plus noise signals; calculating a channel matrix on the subcarrier in the physical resource block; calculating a weight number combining matrix on the subcarrier in thephysical resource block according to the interference plus noise covariance matrix and the channel matrix; calculating a combining value regulation factor on the subcarrier in the physical resource block according to the channel matrix and the weight number combining matrix; calculating a receiving signal combining value on the subcarrier of non-pilot symbols in the physical resource block according to the calculated weight number combining matrix; and regulating the receiving signal combining value of the non-pilot symbols in the physical resource block according to the calculated combining value regulation factor to acquire a regulation result.

Description

technical field [0001] The present invention relates to the communication field, in particular to an interference suppression combining method and system. Background technique [0002] ICI (Inter cell interference, inter-cell interference) is an inherent problem in cellular mobile communication systems. The traditional solution is to use frequency multiplexing, and the multiplexing coefficient has only a few specific choices, such as 1, 3, 7, etc. Reuse coefficient = 1, that is, adjacent cells use the same frequency resource, and the interference at the edge of the cell is very serious at this time. A lower multiplexing factor (3 or 7) can effectively suppress ICI, but the spectral efficiency will be reduced. [0003] ICI suppression techniques include: interference randomization (ICI randomization), interference coordination (ICIcoordination) and interference elimination (ICI cancellation). [0004] Interference randomization refers to a type of technology for suppressing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B7/02H04L1/06
Inventor 周作成姜韬
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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