Multi-user paring algorithm applied to VMIMO system

A multi-user, user technology, applied in transmission systems, diversity/multi-antenna systems, space transmit diversity and other directions, can solve problems such as low throughput of edge users

Active Publication Date: 2013-07-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The technical problem to be solved by the present invention is to provide a multi-user pairing algorithm applied to the virtual MIMO system in view of the above-mentioned problems. , select the paired users one by one, while reducing the search complexity, and maximize the system throughput; when calculating the n-th layer paired users, the channel capacity after pairing needs to calculate the n-order determinant. In order to further reduce the calculation complexity, this Each step in the algorithm only needs to calculate the second-order determinant; at the same time, for the problem of low throughput of edge users, proportional fairness factors α and β are introduced to further solve the problem of low throughput of edge users

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  • Multi-user paring algorithm applied to VMIMO system
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  • Multi-user paring algorithm applied to VMIMO system

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specific Embodiment 1

[0091] When the number of paired users is n=3, the pairing process is as follows:

[0092] Step 0: Set k 1 (x) represents user x itself, k 2 (x) represents the first paired user of user x, k 3 (x) represents the second paired user of user x, ..., k n+1 (x) represents the nth paired user of user x, i∈Ω, Ω represents the set of users who have not allocated resource blocks when the VMIMO system transmits data uplink, Λ 1 is the set of users who have allocated resource blocks when the VMIMO system transmits data uplink, Ω and Λ 1 The collection of is the entire user collection.

[0093] Step 1: Calculate the channel capacity value D of user x according to formula (32) 1 (x)

[0094] D 1 ( x ) = M x + Σ m = 1 M x ...

specific Embodiment 2

[0116] When the number of paired users is n=4, the pairing process is as follows:

[0117] On the basis of Embodiment 1, the step 4 becomes: according to the channel capacity value D when user x transmits data uplink in the VMIMO system in step 3 3 (x) Select the third paired user for each scheduled user in descending order, x∈Λ 3 , Λ 3 Represents the set of users who have found the third pairing, calculated according to the formulas (42), (43), (44), and (45) respectively k 4 (x), D 4 (x) if D 4 (x)>D 3 (x), select k 4 (x) is the third paired user of user x, and k 4 (x) Remove from the unallocated resource block set Ω; otherwise, user x will no longer perform pairing, and user x sends data to the base station in the form of VMIMO through 3 paired users; select the third paired user for each user x in turn , if user x has traversed the set Λ 3 , then go to step 5; otherwise, proceed to step 4 for the next scheduled user x;

[0118] Step 5: According to the chann...

specific Embodiment 3

[0124] When the number of paired users is n=5, the pairing process is as follows:

[0125] On the basis of Embodiment 2, step 5 is modified to: according to the channel capacity value D when user x transmits data uplink in the VMIMO system in step 4 4 (x) Select the fourth paired user for each scheduled user in descending order, x∈Λ 4 , Λ 4 Represents the set of users who have found the fourth pairing, calculated according to the formulas (46), (47), (48), and (49) respectively k 5 (x), D 5 (x) if D 5 (x)>D 4 (x), select k 5 (x) is the fourth paired user of user x, and k 5 (x) Remove from the unallocated resource block set Ω; otherwise, user x will no longer perform pairing, and user x sends data to the base station through 4 paired users in the form of VMIMO; when selecting the fourth paired user for user x in turn, If user x has traversed the set Λ 4 , then execute step 6; otherwise, proceed to step 5 for the next scheduled user x;

[0126] Step 6: According t...

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Abstract

The invention relates to a multi-input multi-output wireless mobile communication system, in particular to a multi-user paring algorithm for an uplink VMIMO system. The suboptimum multi-user paring algorithm which is applied to the virtual MIMO system and based on a greed rule is provided to solve the problem in the prior art, the algorithm can select pairing users one by one according to the channel situation of users, and improves handling capacity of the system to the maximum extent while reducing researching complexity. Meanwhile, in order to solve the problem of low handling capacity of marginalized users, proportional fair factors alpha and beta are led in to further solve the problem of complexity computation. According to the multi-user paring algorithm for the uplink VMIMO system, an nth paring user is selected for a dispatched user x in a sequence from a large channel capacity of the user x to a small channel capacity of the user x, and the multi-user paring algorithm is applied to the field of uplink data transmission of the VMIMO system.

Description

technical field [0001] The invention relates to a multiple input and output wireless mobile communication system, in particular to a multi-user pairing algorithm of an uplink virtual MIMO system. Background technique [0002] In various fields where electromagnetic wave technology is applied, especially in wireless communication, Multiple-Input Multiple-Output (Multiple-Input Multiple-Out-put, hereinafter referred to as MIMO) technology has been widely used. MIMO technology is aimed at multi-path wireless channels. It refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and receiving end, thereby increasing the data rate, reducing the bit error rate, and improving the quality of wireless signal transmission. MIMO technology can greatly improve system capacity and spectrum efficiency, enabling the system to use limited time-frequency resources to obtain higher transmission rates and system throughput. However, due to the demand f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B17/00H04B17/382
Inventor 赵宏志郑博文唐友喜
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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