fd-mimo multi-cell downlink interference coordination method
An interference coordination, multi-cell technology, applied in multiplexing communications, orthogonal multiplexing systems, electrical components, etc., to solve the problems of infeasible interference coordination and high system feedback overhead.
Active Publication Date: 2021-03-23
SOUTHEAST UNIV
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However, for FDD systems, the acquisition of instantaneous channel state information will lead to a large amount of system overhead and feedback, especially when the scale of base station antennas and the number of users in massive MIMO systems are large, the system feedback overhead will be very large. state information for interference coordination will become infeasible
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[0057]The technical solutions provided herein will be described in detail below with reference to the specific embodiments, and it is to be understood that the following detailed description is intended to illustrate the scope of the invention.
[0058]The present invention provides a multi-cell downstream transmission system based on partial frequency multiplexed FD-MIMO multi-cell downlink interference coordination. System architecturefigure 1 As shown, each cell can be divided into three sectors; the adjacent sectors of the three neighboring cells constitute a cooperative area, ie g = 3, such asfigure 1 The crude black line area is shown; the number of cells and sector divisions are only examples, and other quantitative cells can be used in other ways, or otherwise perform sector dividing as needed. Each base station uses a uniform planar antenna array, and the vertical direction includes MvRow antenna element, horizontal direction MhMatching elements; each base station utilizes kno...
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The present invention provides an FD-MIMO multi-cell downlink interference coordination method. A multi-cell downlink transmission system is employed, adjacent sectors of adjacent cells form a coordination area, ad each base station employs one uniform planar array antenna. The method comprises the steps of: employing a large-scale fading factor to divide center users and edge users by each base station in the coordination area; for each edge user, employing statistical channel information to perform full cooperation interference coordination or partial cooperation interference coordination; based on a partial frequency multiplexing method, dividing service frequency bands of the center users and the edge users, and calculating the transmission power of each base station for the edge users; and calculating beam forming vectors for edge users by each cell, and employing the transmission power to perform precoding transmission. The method provided by the invention employs the channel statistical information to coordinate interference between the cells, is small in the required channel information amount, simple in transmission scheme implementation, little in feedback amount, high inrobustness, low in complexity and easy to implement, effectively improves the cell edge user service quality and is suitable for various classic wireless communication systems.
Description
Technical field[0001]The present invention belongs to the field of wireless communication technology, which relates to a FD-MIMO multi-cell downlink transmission system using a uniform planar antenna array using a base station, and more specifically, it is to involve partial frequency-based FD-MIMO multi-cell downlink interference coordination. method.Background technique[0002]Under the promotion of the popularity of smart mobile terminal equipment, the modern information society has put forward higher requirements for the transmission rate and connection of the wireless communication system. In order to significantly improve the transmission rate and reliability of the wireless communication system in the case of the spectrum resource, the technology is deployed in the base station into a hundred or even thousands of antennas, namely, large-scale MIMO wireless transmission technology, key technologies for future wireless communication. Widespread concern. The spatial resolution of ...
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IPC IPC(8): H04B7/0413H04W24/04H04J11/00
CPCH04B7/0413H04J11/005H04W24/04
Inventor 李潇秦娜娜高西奇
Owner SOUTHEAST UNIV