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Pilot scheduling method applicable to massive MIMO (multiple-input multiple-output) cellular mobile communication networks

A technology for cellular mobile communication and pilot scheduling, which is applied in the directions of pilot signal allocation, multiple use of transmission paths, and sub-channel allocation of transmission paths. It can solve problems such as information rate reduction, and achieve efficient pilot scheduling, excellent performance, Effectiveness of Eliminating Severe Pilot Interference Phenomenon

Active Publication Date: 2018-04-03
CHINA INFOMRAITON CONSULTING & DESIGNING INST CO LTD
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Problems solved by technology

In this context, in order to realize the deployment of massive MIMO communication systems, the problem of reducing the system's available information rate caused by pilot pollution needs to be taken seriously

Method used

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  • Pilot scheduling method applicable to massive MIMO (multiple-input multiple-output) cellular mobile communication networks
  • Pilot scheduling method applicable to massive MIMO (multiple-input multiple-output) cellular mobile communication networks
  • Pilot scheduling method applicable to massive MIMO (multiple-input multiple-output) cellular mobile communication networks

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] Such as Figure 4 As shown, the present invention discloses a pilot scheduling method suitable for massive MIMO cellular mobile communication networks. The downlink communication scenarios in the massive MIMO system based on time division multiplexing considered by the present invention, such as figure 1 As shown, there are Q cells, and each cell has a base station (BS) equipped with M antennas and K uniformly distributed single-antenna user terminals (UT), where M> >K. For the convenience of expression, the kth UT in the pth cell is called UT, then the channel gain vector between UT and the qth base station Can be expressed as:

[0038]

[0039] in and are the large-scale channel coefficients and small-scale fading vectors between UT and the qth base station, respectively. h ,q The elements in are independent identically distributed...

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Abstract

The invention discloses a pilot scheduling method applicable to massive MIMO (multiple-input multiple-output) cellular mobile communication networks. The pilot scheduling method includes steps of (1),acquiring state information of channels between base stations and users in the base stations; (2), initializing heuristic information and information elements on construction graphs; (3), generatinga plurality of artificial ants and allowing the ants to completely walk on the construction graphs; (4), recording walk paths of the ants and generating pilot allocation matrixes; (5), judging whetherstop conditions are met or not, stopping actions if the stop conditions are met, and outputting the pilot allocation matrixes; (6), updating the information elements on the construction graphs and skipping to the step (3). The pilot scheduling method has the advantages that the pilot scheduling method for relieving the influence of pilot contamination in massive MIMO systems is proposed on the basis of ant colony optimization tools, and the available information rates of the systems can be maximized.

Description

technical field [0001] The invention belongs to the technical field of wireless communication and communication signal processing, and in particular relates to a pilot frequency scheduling method applicable to a massive MIMO cellular mobile communication network. Background technique [0002] Massive MIMO (massive multiple-input multiple-output) technology can greatly improve the spectral efficiency and energy efficiency of cellular mobile networks by using a large number of antennas in the base station to form a giant antenna array. The core technology of the physical layer. Based on massive MIMO technology, it can eliminate non-correlated noise and interference within the base station. However, since the orthogonal pilots are multiplexed in multiple base stations, the resulting interference between base stations cannot be eliminated. This phenomenon is usually called "pilot contamination". Pilot contamination reduces the user's signal-to-interference-to-noise ratio, ther...

Claims

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Application Information

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IPC IPC(8): H04B7/0413H04L5/00
CPCH04B7/0413H04L5/0048
Inventor 吴启宗田原陈俊雷戴春雷
Owner CHINA INFOMRAITON CONSULTING & DESIGNING INST CO LTD
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