Multi-user MIMO test method between base stations

A detection method and technology between base stations, applied in the field of multi-user MIMO detection between base stations, can solve the problems of low accuracy of detection results and inability to reasonably utilize signal information of other users on the same frequency

Inactive Publication Date: 2009-12-30
POTEVIO INFORMATION TECH CO LTD +1
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Problems solved by technology

[0008] In a multi-user MIMO system, if the above-mentioned detection method under single-user MIMO is directly applied for signal detection, then for the user to be detected, only the users with the same frequency as the user in other adjacent cells outside the cell where the user is located Other users act as interference and conduct independent signal detection for the user itself. In this way, the signal information of other users with the same frequency cannot be reasonably used during the detection process, making the final detection result inaccurate.

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[0032] In order to make the purpose, technical means and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] Users occupying the same time-frequency resources are called co-frequency users. Since co-frequency users occupy the same time-frequency resources, they interfere with each other more. For inter-frequency users occupying different time-frequency resources, the mutual interference is small. It can be ignored in the detection and will not affect the signal detection result. Therefore, in the present invention, when performing multi-user MIMO signal detection, mutual interference between users of the same frequency is considered, and the interference between users of the same frequency is utilized to perform joint detection on users of the same frequency.

[0034] Furthermore, multiple users participating in multi-user MIMO may be located in different cells, and t...

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Abstract

The invention discloses a multi-user MIMO test method between base stations, comprising: for any user in a district where each base station is located, a same-frequency user occupying same time-frequency resource with the user in the current district and the adjacent district are determined; the identification information of the same-frequency user is shared between the base station of the user and the base station of the district where the same-frequency user of the user is located; the identification information is used by the district base station to estimate the channel character of the same-frequency user of other district in the base station; each station combines the users in the district with the same-frequency user thereof to be tested so as to obtain the test results of the user and the same-frequency user thereof. If applied, the invention can realize multi-user MIMO combined testing for a plurality of districts, which can effectively inhibit same-frequency interference and improve system performance.

Description

technical field [0001] The invention relates to the technique of multiple-input multiple-output (MIMO) signal detection, in particular to a multi-user MIMO detection method between base stations. Background technique [0002] For MIMO communication systems, the optimal detection method in the sense of the smallest joint error probability is the maximum likelihood (ML) method or the maximum a posteriori probability (MAP) method, but the complexity of these two detection methods is very high. high, it is difficult to apply in practical systems. However, the requirements of practical applications make the research of MIMO detection algorithms mainly focus on finding low-complexity high-performance detectors. [0003] At present, low-complexity and high-performance detection methods mainly include: linear zero-forcing (ZF) algorithm, ZF-OSIC algorithm combined with Ordered Successive Interference Cancellation (OSIC, Ordered Successive Interference Cancellation), linear minimum ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00H04B17/00H04B7/04
Inventor 龚萍吕旌阳林雪红房亮赵振山雷旭胡炜
Owner POTEVIO INFORMATION TECH CO LTD
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