Intercell interference suppression method based on channel coherence multi-subscriber dispatching

A multi-user scheduling and inter-cell interference technology is applied in the field of inter-cell interference suppression based on channel correlation multi-user scheduling, which can solve problems affecting system performance and the inability of multi-user MIMO systems in a single cell to deal with interference problems, so as to improve capacity , taking into account system performance and complexity, and easy to achieve effects

Inactive Publication Date: 2010-06-23
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

In the actual application of MIMO systems, the interference from the same cell and adjacent cells will greatly affect the system performance, therefore, we need to suppress the interference
[0004] The interference suppression algorithm of the original single-cell multi-user MIMO system ca

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  • Intercell interference suppression method based on channel coherence multi-subscriber dispatching
  • Intercell interference suppression method based on channel coherence multi-subscriber dispatching
  • Intercell interference suppression method based on channel coherence multi-subscriber dispatching

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, the cell base station clustering method adopts a fixed cell clustering structure. Consider seven cells in a regular hexagonal structure, each cell has 3 sectors. Adjacent sectors of every three adjacent cells form a cluster, and the joint transmission (JP) scheme of the present invention is carried out in the cluster.

[0023] Such as figure 2 As shown, consider the multi-cell multi-user MIMO downlink composed of K edge cell users, and the number of user UE antennas is N r , the number of base station eNBs for CoMP transmission is N b , the number of transmitting antennas for each base station is N t , the power is limited to P b . The channel from the base station to the user is a Rayleigh flat fading channel, {H b，c} is the bth cooperative base station eNB b to the cth user UE c The small-scale fading channel matrix, a ...

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Abstract

The invention discloses an intercell interference suppression method based on channel coherence multi-subscriber dispatching, specifically comprising the following steps: first of all, determining the activated user collection in the cooperative multi-point transmission mode CoMP, performing the multi-user dispatching for the activated user collection, selecting the user collection having the least channel coherence with channel coherence dispatching standard as the final CoMP transmission user collection, and designing a block diagonal pre-coding array by the system based on the channel state information of various users in the CoMP transmission user collection to eliminate the interference between users and perform multiple base station cooperative combined transmission for the user. The method is suitable for multi-cell multi-user MIMO system, thereby giving better attention to both the system performance and the complexity, effectively inhibiting the interference between cells, improving user performance at the cell edge and enhancing the overall system capacity.

Description

technical field [0001] The invention belongs to wireless communication technology, in particular to a method for suppressing inter-cell interference based on channel correlation multi-user scheduling. Background technique [0002] With the sharp increase in the number of mobile communication users and the rapid rise of wireless broadband services (such as multimedia services), the existing mobile communication systems cannot fully meet the needs, and people hope to obtain higher data transmission rates and spectrum efficiency. [0003] Multiple Input Multiple Output (MIMO) is a technology that configures multiple antennas at both the transmitting end and the receiving end. It can double the spectral efficiency of the system. However, in the actual application of MIMO systems, the interference from the same cell and adjacent cells will greatly affect the system performance. Therefore, we need to suppress the interference. [0004] The interference suppression algorithm of t...

Claims

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Application Information

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IPC IPC(8): H04W52/24H04W72/04H04W72/12
Inventor 葛晓虎黄坤杜曲张靖曹程倩向林刘创胡金钟
Owner HUAZHONG UNIV OF SCI & TECH
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