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Downlink multiuser selection method used for multi-aerial system

A multi-antenna system, multi-user technology, applied in wireless communication, network traffic/resource management, electrical components and other directions, can solve the problems of limited search range, limited multi-user diversity gain, etc., to achieve low computational complexity and increased performance. Effect

Active Publication Date: 2009-10-14
COMBA TELECOM SYST CHINA LTD
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AI Technical Summary

Problems solved by technology

The search range of this method is very limited, which limits the diversity gain of multiple users

Method used

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  • Downlink multiuser selection method used for multi-aerial system
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  • Downlink multiuser selection method used for multi-aerial system

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] see figure 1 , introduces the basic architecture of downlink multi-antenna multi-user communication system: including a base station and multiple end users. The base station is configured with multiple transmitting antennas, and each end user is configured with a single receiving antenna. If the user configures multiple antennas and only uses them for receiving diversity, it can be equivalent to a single-antenna situation.

[0035] see figure 2 , introducing a block diagram of functional modules of a base station applicable to the present invention. In order to be able to apply the multi-user selection method of the present invention. The base station must be configured with at least three functional modules: a scheduler, channel coding and beamforming...

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Abstract

The invention relates to a downlink multiuser selection method used for a multi-aerial system, which defines a total user set, a prioritized user set and a candidate user set; a base station selects users with maximum weight value from the prioritized user set as first users, selects users with maximum orthogonal component projected on spanning space of selected user channel vector from the candidate user set by an iterative process so as to form a collaborative user group; the prioritized user set is updated and continues to iterate so as to form a new collaborative user group till the prioritized user set is empty; and then a user group with maximum weight value sum is selected from the formed collaborative user group as a target user group when the base station schedules. On the basis of guaranteeing lower computational complexity, the method better utilizes multiuser diversity gain, improves the performance of scheduling algorithm, not only fully utilizes multiuser channel characteristics, but also considers other characteristics of the user.

Description

technical field [0001] The present invention relates to a downlink multi-user selection method for a multi-antenna system, that is to say, it relates to a downlink multi-user multi-antenna communication system in which a base station is provided with multiple transceiver antennas and a user configures a single antenna, and a method for selecting users, The invention belongs to the technical field of MIMO antenna wireless communication. Background technique [0002] With the rapid development of wireless communication technology, the serious shortage of spectrum resources has become a "bottleneck" in the development of wireless communication. Multi-antenna technology is widely favored because it can double the frequency utilization without increasing the bandwidth and antenna transmission power. Moreover, in an actual communication system, the base station can easily configure multiple antennas, but the terminal is limited by equipment size, hardware complexity, manufacturin...

Claims

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Application Information

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IPC IPC(8): H04W28/16H04W72/12
Inventor 彭木根周通王文博
Owner COMBA TELECOM SYST CHINA LTD
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