Signal-to-leakage-and-noise ratio (SLNR) rule statistic-based MIMO (Multiple Input Multiple Output) multi-user downlink transmission method

Abstract

The invention provides a signal-to-leakage-and-noise ratio (SLNR) rule statistic-based MIMO (Multiple Input Multiple Output) multi-user downlink transmission method which comprises the following steps of: acquiring a sending correlation matrix between a base station and a user by the base station in a feedback or hidden feedback mode according to a channel estimated result; calculating a downlink precoding vector space to be formed by a dispersion Fourier matrix by utilizing the information according to the lower bound of the maximum statistics of the SLNR; and further dispatching all users suitable for downlink transmission and carrying out power allocation among users by the base station through diagonal matrix features of feature values of the sending correlation matrix according to the principle of mutual coupling of diagonal matrix energy of different feature values, thereby completing the MIMO multi-user downlink transmission method on the basis. The MIMO multi-user downlink transmission method improves the frequency spectrum utilization ratio and power efficiency of a communication system, and greatly reduces the system cost needed by the base station for carrying out downlink precoding transmission; and the base station adjusts the sending parameters according to the channel statistic channel state information so as to obtain a higher system transmission rate with lower system cost.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to multiple-input multiple-output MIMO communication technology, and is used to realize a multi-user mobile communication system for high-speed data transmission, in particular to a MIMO multi-user downlink transmission based on the criterion of maximizing statistical signal-to-leakage-to-noise ratio method. Background technique [0002] Compared with the third-generation mobile communication system, the future mobile communication system is required to support high-speed data service rates up to hundreds of megabytes or even 1G bits per second. In the case of increasingly tight wireless resources, a new network architecture should be adopted, and MIMO multi-user Wireless transmission technology, fully exploiting space resources, and maximizing spectrum utilization and power efficiency have become the key to future mobile communication research. [0003] The MIMO transmiss...

AI Technical Summary

Problems solved by technology

In recent years, the research on MIMO multi-user downlink transmission technology has mainly focused on the situation where the base station has known instantaneous channel state information. These studies are only applicable to fixed and low-speed mobile communication scenarios. The research on MIMO multi-user downlink transmission technology for medium and high-speed mobile communication environments is relatively There are few, and the multi-user downlink transmission method that comprehensively utilizes the channel statistical state information is rarely reported

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