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Method and device for suppressing interference signal

A technology that interferes with signals and signals, applied in the field of communication, can solve problems such as inaccurate interference

Active Publication Date: 2015-11-18
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The invention provides a method and device for suppressing interference signals to solve the problem of inaccurate interference acquisition

Method used

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  • Method and device for suppressing interference signal
  • Method and device for suppressing interference signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A method for suppressing interference signals provided by an embodiment of the present invention is introduced in detail.

[0069] refer to figure 1 , shows a flowchart of the steps of a method for suppressing interference signals in an embodiment of the present invention.

[0070] Step 100, performing signal reduction on the received signal of the local cell.

[0071] Since the interference of the received signal of this cell will be stronger than the interference of neighboring cells, the received signal of this cell is firstly subjected to a signal reduction operation.

[0072] Specifically, the reduction standard or reduction degree of the received signal of the local cell may be set according to the actual situation, and the embodiment of the present invention does not limit the signal reduction of the received signal of the local cell.

[0073] In step 102, channel estimation is performed on the received signal of the own cell after the signal subtraction by usi...

Embodiment 2

[0078] A method for suppressing interference signals provided by an embodiment of the present invention is introduced in detail.

[0079] refer to figure 2 , shows a flowchart of the steps of a method for suppressing interference signals in an embodiment of the present invention.

[0080] Step 200, performing signal reduction on the received signal of the cell.

[0081] Since the interference of the received signal of this cell will be stronger than the interference of neighboring cells, the received signal of this cell is firstly subjected to a signal reduction operation.

[0082] Specifically, the reduction standard or reduction degree of the received signal of the local cell may be set according to the actual situation, and the embodiment of the present invention does not limit the signal reduction of the received signal of the local cell.

[0083] Step 202: Perform channel estimation on the received signal of the own cell after the signal subtraction by using the refere...

Embodiment 3

[0122] A device for suppressing interference signals provided by an embodiment of the present invention is introduced in detail.

[0123] refer to image 3 , shows a schematic structural diagram of an apparatus for suppressing interference signals in an embodiment of the present invention.

[0124] The apparatus may include: a signal reduction module 300 , a channel estimation module 302 , and an interference suppression module 304 .

[0125] The functions of each module and the relationship between each module are introduced in detail below.

[0126] The signal reduction module 300 is configured to perform signal reduction on the received signal of the cell.

[0127] The channel estimation module 302 is configured to perform channel estimation on the received signal of the own cell after the signal subtraction by using the reference signal of the own cell and the reference signal of the neighboring cell to obtain an accurate interference signal.

[0128] It should be noted...

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PUM

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Abstract

The invention provides a method and device for suppressing an interference signal. The method comprises performing signal reduction on a received signal of a cell, performing channel estimation on the received signal of the cell after the signal reduction through the a reference signal of the cell and a reference signal of an adjacent cell to obtain an accurate interference signal, and suppressing the accurate interference signal. Before the interference signal is obtained, the signal reduction is performed on the received signal of the cell, a signal after the received signal of the cell is cut off is used, an interference is estimated through a combination with dispatching information of the adjacent cell, the accurate interference signal is obtained, and a good suppression effect is provided when an uplink same-frequency interference of the adjacent cell is faced.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for suppressing interference signals. Background technique [0002] In actual network planning of a Long Term Evolution (LTE) system, co-frequency networking is mostly used, and co-frequency interference may occur in such a system. [0003] Currently, in an LTE receiver, an uplink Interference Rejection Combining algorithm (Interference Rejection Combining, IRC) is mostly used to suppress interference. The general IRC is as follows: [0004] x=(H H SH+C) -1 h H Sy; [0005] Where x is the equalization result, y is the antenna signal, H is the channel estimation result, and for N R ×N R The interference noise covariance matrix of ; for N T ×N T The covariance matrix of the transmitted signal, N R is the number of receiving antennas, N T is the number of transmitting antennas, [0006] The key of IRC is to obtain more accurate channel es...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04W72/54
CPCH04J11/005H04L25/0204H04L25/0224H04W72/541H04L5/0048H04L5/0073H04L25/0202H04W72/12
Inventor 王希吴刚
Owner DATANG MOBILE COMM EQUIP CO LTD