A large-scale mimo transmission method for space-time correlated channels

A data transmission method and a large-scale technology, applied in transmission systems, digital transmission systems, multiple use of transmission paths, etc., can solve problems such as system capacity reduction, downlink data that cannot be guaranteed to be non-coherent, and data interference between cells
CN103560985BInactive Publication Date: 2017-01-18BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNIV OF TECH
Publication Date
2017-01-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the field of image processing, and discloses a space-time correlated channel massive MIMO transmission method. According to the space-time correlated channel massive MIMO transmission method, a time-shifted pilot frequency system structure is adopted, a user selection scheme based on the position of a user is utilized, user sub-groups having large interference in surrounding cells are omitted, so that data interference of the adjacent cells is reduced in a channel estimation stage, meanwhile, interference among the cells is reduced in a downlink data transmission stage, and system capacity is promoted. On the basis of the user selection scheme, a Kalman estimation method is adopted, a space-time correlation between channels is used, residual interference among the cells is eliminated further, and channel estimation accuracy is promoted. By means of combination of a user selection process and Kalman channel estimation, more accurate channel estimation results are obtained under the space-time correlated channel of a multi-cell massive MIMO system, interference among the cells in a pilot frequency estimation stage is restrained, and meanwhile the throughput rate of downlink data of the system is increased.
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Description

technical field

[0001] The invention belongs to the field of wireless communication, and relates to a large-scale MIMO transmission method of a space-time correlation channel.

[0002] technical background

[0003] Multiple-Input Multiple-Output (Multiple-Input Multiple-Output, MIMO) is a wireless communication technology that uses multiple antennas to send and receive data in a wireless communication system. It is transmitted by multiple antennas, and the receiving end uses multiple antennas to receive. Compared with Single-Input Single-Output (SISO) communication technology, MIMO technology can use space multiplexing and space diversity to double the system capacity, improve channel reliability and reduce bit error rate. MIMO technology has been widely used in the third generation mobile communication system. Large-scale MIMO technology is also called Massive MIMO technology, which refers to increasing the number of transmitting and receiving antennas to dozens or even hu...

Claims

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