FD-MIMO multi-cell downlink interference coordination method

Abstract

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 invention belongs to the technical field of wireless communication, and relates to an FD-MIMO multi-cell downlink transmission system using a uniform planar antenna array at a base station, and more specifically, relates to FD-MIMO multi-cell downlink interference coordination based on partial frequency reuse method. Background technique [0002] Driven by the wave of popularization of smart mobile terminal devices in the modern information society, higher requirements are put forward for the transmission rate, number of connections and user experience of wireless communication systems. In order to greatly improve the transmission rate and reliability of the wireless communication system under the condition of increasingly tight spectrum resources, the technology of deploying hundreds or even thousands of antennas in the base station, that is, massive MIMO wireless transmission technology, is a key technology for future wireless communication. Wid...

AI Technical Summary

Problems solved by technology

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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