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Method and device for interference cancellation in wireless communication system

A technology of wireless communication system and interference cancellation, applied in the field of signal interference cancellation during cell measurement, can solve problems such as cell signal interference, achieve the effect of enhancing detection performance and solving signal interference

Inactive Publication Date: 2015-01-28
SANECHIPS TECH CO LTD
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Problems solved by technology

[0004] The main purpose of the present invention is to solve the problem that the UE is easily interfered by signals from different cells when detecting cells. The present invention adopts the method of interference cancellation and uses the information of the stronger cell detected first

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  • Method and device for interference cancellation in wireless communication system
  • Method and device for interference cancellation in wireless communication system

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Embodiment Construction

[0038] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0039] A method for interference cancellation in a wireless communication system in the present invention, the flow chart of which is as follows figure 1 shown, includes the following steps performed by the UE:

[0040] S11, by detecting the received signal, obtain the relevant information of the target cell; (the obtained target relevant information includes the ID and timing information of the target cell)

[0041] S12. Perform channel estimation according to the secondary synchronization signal SSS of the target cell;

[0042] S13, using the channel estimation to reconstruct the primary synchronization signal PSS and the secondary synchronization sign...

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Abstract

An interference cancellation method and a device in a wireless communication system. The method mainly includes following steps which are performed by a User Equipment (UE): obtaining related information of a target cell by detecting reception signals(S11); performing channel estimation according to the Secondary Synchronization Signal (SSS) of the target cell(S12); reconstructing the Primary Synchronization Signal (PSS) and the SSS by using the channel estimation(S13); cancelling the PSS and SSS of the target cell in the reception signal by using the reconstructed PSS and SSS to obtain a reception signal in which the interference from the target cell is cancelled(S14); performing the above steps repeatedly for the reception signal in which the interference from the target cell is cancelled until obtaining a reception signal in which the interferences from all target cells that can be searched out are cancelled. Thus the performance to detect cells with the same frequency can be enhanced greatly, especially to the adjacent cells with the same frequency whose signals are weak.

Description

technical field [0001] The invention relates to a method and device for canceling interference of wireless communication signals, and is especially suitable for the method and device for canceling signal interference during cell measurement. Background technique [0002] In wireless communication systems, especially in cellular communication, measurement plays a very important role in cell handover and reselection. First, the UE (User Equipment) needs to identify the ID and timing information of the same-frequency or inter-frequency neighboring cells before performing measurement. Secondly, the ANR (automatic neighbor relation) function that needs to be supported in the next generation mobile network also puts forward higher requirements on the UE's ability to detect neighboring cells. Finally, even if the Cell ID of an adjacent cell is issued by the E-nodeB, the UE needs to detect the timing of the corresponding cell. When the signal strengths of two or more cells on the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04W24/00
CPCH04W36/0083H04J11/005H04B1/123
Inventor 李焱易立强李双喜
Owner SANECHIPS TECH CO LTD
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