Multi-cell cooperative transmission method

A technology of multi-cell cooperation and transmission method, which is applied in the field of multi-cell cooperative transmission in a multi-antenna downlink system, can solve problems such as performance loss, achieve the effects of eliminating data interference, improving spectrum utilization, and increasing user transmission rates

Inactive Publication Date: 2011-06-22
SHANDONG COMP SCI CENTNAT SUPERCOMP CENT IN JINAN
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Problems solved by technology

In this way, there must be a certain performance loss in the realization of spectral efficiency.

Method used

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Embodiment Construction

[0047] With reference to FIG. 1 of the description, the present invention will be described in detail below through the accompanying drawings and embodiments.

[0048] Figure 1-a A conventional multi-cell downlink schematic diagram is shown. In the figure, the solid line indicates that the user receives useful signal information transmitted from the base station in the cell where the user is located, and the dotted line indicates the co-channel interference information received by the user from other user information transmitted by neighboring base stations. In traditional multi-cell, each base station only obtains the channel fading information of its own cell, and transmits user information within the coverage of its own cell. In this way, users in each cell are affected by co-channel interference signals from adjacent cells, and the quality of the received signals is greatly reduced. Therefore, it is difficult to improve the capacity of the conventional multi-cell downlin...

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Abstract

The invention provides a block diagonalization technology-based cooperative transmission optimizing scheme, which is applied to a multiple-input multiple-output (MIMO) multi-cell downlink system and can increase the frequency spectrum utilization rate of the system. The basic thought of cooperative transmission is that: a base station determines a scheme for preprocessing each piece of user data information before transmission in combination with a block diagonalization technology according to the channel information of each user; and then optimal power allocation is performed on the user data information by adopting a principle of optimality according to the channel state information of the user and the preprocessing scheme thereof. Compared with the other cooperative transmission schemes adopting the block diagonalization technology, the scheme provided by the invention is a compromise choice for frequency spectrum efficiency and realization complexity.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a multi-cell cooperative transmission method of a multi-antenna downlink system. Background technique [0002] With the increasing development of wireless communication technology, spectrum resources are becoming more and more scarce. In order to meet people's increasing requirements for data transmission speed, how to improve spectrum utilization efficiency as much as possible within limited spectrum resources to meet the needs of broadband data services becomes the key. Multiple-Input Multiple-Output (Multiple-Input Multiple-Output, MIMO) spatial multiplexing technology is widely regarded as an effective means to improve spectrum utilization efficiency. However, in a multi-cell system, the transmitter needs to adopt an effective method to make full use of the MIMO spatial multiplexing technology, thereby suppressing the influence of multi-cell interference. [00...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W52/04H04W72/04
Inventor 王亚琛马晓凤姜竞赛李晔
Owner SHANDONG COMP SCI CENTNAT SUPERCOMP CENT IN JINAN
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