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Based on l 2 User scheduling method for multi-user mimo system based on -hausdorff distance

A system user and scheduling method technology, applied in wireless communication, electrical components, etc., can solve the problems of low system throughput and high complexity

Inactive Publication Date: 2019-09-27
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Recently, many optimal methods have been proposed to find a better balance, but they either have high complexity or low system throughput

Method used

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  • Based on l <sub>2</sub> User scheduling method for multi-user mimo system based on -hausdorff distance
  • Based on l <sub>2</sub> User scheduling method for multi-user mimo system based on -hausdorff distance
  • Based on l <sub>2</sub> User scheduling method for multi-user mimo system based on -hausdorff distance

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Embodiment Construction

[0028] The present invention is described in detail below in conjunction with accompanying drawing:

[0029] Assume that the transmitter is configured with M antennas, and there are a total of users, and assume that user i configures N i root receiving antenna; this application mainly considers the overloaded MIMO system, that is And it is assumed that each channel is stationary in the scheduling slot.

[0030] suppose is the modulo of all users as gather, yes A modulo of K l A subset of , and, therefore, the received signal can be expressed as

[0031]

[0032] in representative set In the user, the following table k, j represents the user ID, and the set represented by l in the above formula belongs to the lth subset. is a user channel matrix. The total power of the symbols should be less than the total transmit power, that is, P is the total power of the transmitter. Represents white Gaussian noise with zero mean. matrix on behalf of the us...

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Abstract

The invention discloses a multi-user MIMO system user scheduling method based on a L2-Hausdorff distance. The method comprises the following steps of an initialization portion: in an overload MIMO system, supposing that each channel is stable in a scheduling time slot, initializing an alternative user set and a scheduling set, and calculating a norm of each user channel; selecting a first user which is defined in the description, at this time, updating two sets, and using an irrigation power distribution method to calculate a system throughput of this time; a circulation iteration portion: using a greedy algorithm to carry out circulation iteration from a second user till that K users are selected from K<^> users and selecting a needed user set S, wherein the K is an upper limit of the users accommodated by the system; and a circulation termination portion: returning to the selected user set S and calculating a throughput C of the MIMO system at this time. In the invention, under the condition that throughput performance is maintained, complexity can be reduced, system time delay is shortened and so on.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to 2 -Hausdorff distance user scheduling method for multi-user MIMO system. Background technique [0002] At present, a Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Output) system has been gradually applied due to its higher throughput performance. That is to say, the MIMO system can increase the throughput of the system exponentially by applying its expansion in the space dimension. The research results show that the system throughput of the MIMO system is linearly related to the minimum value of the sum of the number of transmit antennas and the number of receive antennas in the system. However, based on the original MIMO system, the system capacity of the multi-user MIMO system has been greatly improved. The system capacity is linearly related to min{M,KN}, where M and N are the number of antennas at the transmitting end and the number of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/12
Inventor 曹叶文袁坤
Owner SHANDONG UNIV