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Inter-cluster interference elimination method based on airspace fine intensity high fractional beams

A technology of inter-cluster interference and strength, applied in the directions of space transmit diversity, diversity/multi-antenna system, radio transmission system, etc., can solve the problems of limiting the transmission rate of edge clusters, reducing the performance of precoding algorithm, interference, etc., to eliminate intra-cluster Effects of interference, increased throughput, and increased transmission rate

Active Publication Date: 2018-01-12
XIDIAN UNIV
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Problems solved by technology

However, in actual scenarios, users are randomly deployed in a limited geographical space, and the ASRs of different user clusters will overlap with a high probability, and the interference between user clusters will be introduced, which will reduce the performance of the above precoding algorithms.
The user clusters at the edge of the cell are particularly affected by ASR overlap, which greatly limits the transmission rate of the edge clusters.

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  • Inter-cluster interference elimination method based on airspace fine intensity high fractional beams
  • Inter-cluster interference elimination method based on airspace fine intensity high fractional beams
  • Inter-cluster interference elimination method based on airspace fine intensity high fractional beams

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Such as figure 1 As shown, the present invention is applicable to a multi-cell cellular network scenario. One base station is configured at the center of each cell, and every three adjacent base stations form a cooperation area. Such as figure 2 As shown in , select a triangular cooperation area served by three adjacent base stations, where each cell center is equipped with a base station, denoted as BS i , i={1,2,3}, each base station installs N t Antennas distributed in a uniform array, N t >>1, the distance between antenna elements is τ. There are 5 user clusters in the area, denoted as C i , j={1,2,3,4,5}, there are 4 installations N in each cluster r user of the root antenna. The radius of the jth cluster is R j , the distance from the i-th base station to the j-th cluster is

[0037] refer to figure 2 with image 3 , the implementation steps...

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Abstract

The invention discloses an inter-cluster interference elimination method based on airspace fine intensity high fractional beams for mainly solving the problem of poor quality of service of cell edge users resulting from the ARSs overlapping phenomenon and the path loss in the prior art. The inter-cluster interference elimination method comprises the following steps: 1) selecting a collaboration area, and calculating a space correlation matrix; 2) calculating a first stage pre-beam forming matrix according to the space correlation matrix so as to calculate an equivalent channel dimension; 3) calculating an optimal spatial degree of freedom; 4) comparing the total degree of freedom with the maximum equivalent channel dimension, judging whether user clusters are suitable for interference alignment, if so, calculating a second stage interference alignment encoding and decoding matrix, and otherwise, calculating a second stage zero-forcing pre-encoding matrix; and 5) calculating a two-stagepre-encoding matrix in conjunction with the first stage encoding and the second stage encoding. According to the inter-cluster interference elimination method, the interference in the edge clusters is eliminated by alignment interference, the interference in central clusters is eliminated by zero-forcing pre-encoding, so that the throughput of the system is effectively improved, and the inter-cluster interference elimination method can be used for large-scale MIMO cellular networks.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to an inter-cluster interference elimination method, which can be used in a massive MIMO cellular network system. Background technique [0002] At present, in the fifth-generation cellular network 5G, in order to meet the wireless service rate that is 1000 times higher than that of the long-term evolution standard LTE-A, massive multiple-input multiple-output MIMO technology has been widely used, and the millimeter wave spectrum covers 30GHz to 300GHz Therefore, the application of millimeter wave frequency band transmission becomes a feasible method to increase network capacity. [0003] In a massive MIMO network structure, in order to effectively complete downlink precoding and uplink detection, the base station needs to obtain sufficiently accurate channel state information. For the time division duplex system, the uplink and downlink reciprocity characteristics of...

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Application Information

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IPC IPC(8): H04B7/0456H04B7/06H04B7/08
Inventor 张顺崔婷婷李红艳马建鹏邱浩
Owner XIDIAN UNIV
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