Space division multiple address (SDMA) transmission method and base station in multi-carrier MU multiple input multiple output (MIMO) system

Abstract

The invention provides a space division multiple address (SDMA) packet schedule method and a base station of a multi-carrier MU multiple input multiple output (MIMO) system. A projected matrix on a combined channel matrix of the other users in the same user group of each user in the user group is calculated, wherein the user group is selected from a plurality of users, a capacity metric of the user group is calculated according to the projected matrix, an optimal user group is selected according the capacity metric of a plurality of user groups. According to the SDMA packet schedule method and the base station of the multi-carrier MU MIMO system, multilingual user interface (MUI) on a terminal user at an emitting end is effectively removed, and calculating complexity is reduced.

Description

technical field [0001] The invention relates to a communication network, in particular to a space division multiplexing access technology based on multiple input and multiple output. Background technique [0002] The MIMO technology (Multiple-Input Multiple-Output, Multiple-Input Multiple-Output) allows multiple antennas to simultaneously transmit and receive multiple spatial streams. The capacity of the channel can be increased by using the MIMO technology, and at the same time, the reliability of the channel can be improved and the bit error rate can be reduced. And SDMA (Space Division Multiple Access, Space Division Multiple Access) is a newly developed multiple access technology, which uses space division to form different channels. Because SDMA technology has the potential to greatly improve the capacity and performance of wireless communication systems, it has attracted extensive attention from researchers. [0003] However, when SDMA technology is applied to MU MIM...

AI Technical Summary

Problems solved by technology

[0012] However, the prior art mechanism is proposed for only one antenna at the UT side

In addition, the precoding algorithm is limited to the zero-breaking method, and it does not give how the scheduling mechanism is used in conjunction with the existing precoding algorithm

This method selects the largest user combination after calculating the zero-forcing (ZF) capacity or SNR of each user combination. When calculating the capacity, this method introduces the zero-forcing method to calculate the weight matrix, but does not consider MU MIMO transport architecture

Also, it should be noted that the index in this mechanism is only designed for a subcarrier in a single-carrier system or a multi-carrier system, and cannot be directly extended to a multi-carrier system.

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