Method and system for obtaining communication channel correlation coefficient in uplink MIMO (Multiple Input Multiple Output)

A technology of channel correlation and channel correlation matrix, applied in the direction of digital transmission system, transmission system, radio transmission system, etc., can solve the problems of not fully reflecting channel correlation, associated channel fading, etc.

Inactive Publication Date: 2012-11-21
ZTE CORP
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Problems solved by technology

[0009] In the Wimax system, the uplink MIMO channel correlation is mainly measured by the signal-to-noise ratio of each transmitting antenna signal. This method correlates with channel fading and cannot fully reflect the channel correlation.

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  • Method and system for obtaining communication channel correlation coefficient in uplink MIMO (Multiple Input Multiple Output)
  • Method and system for obtaining communication channel correlation coefficient in uplink MIMO (Multiple Input Multiple Output)
  • Method and system for obtaining communication channel correlation coefficient in uplink MIMO (Multiple Input Multiple Output)

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[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0042] Such as figure 1 Shown is a flow chart of the method of the present invention, which provides a method for calculating the correlation coefficient of the uplink MIMO channel using the channel response of the pilot, including the following steps:

[0043] S101: Acquire a channel response matrix of the pilot data of the transmitted signal;

[0044] Specifically, if there is pilot data in the transmitted signal, the channel response matrix of the pilot data is obtained by channel estimation on the received signal; specifically expressed as, y=Hx+n, wher...

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Abstract

The invention relates to a method for obtaining a communication channel correlation coefficient in an uplink MIMO (Multiple Input Multiple Output). The method comprises the following steps of: obtaining a communication channel response matrix of emission signal pilot data, carrying out an autocorrelation to obtain an autocorrelation matrix of the communication channel response matrix, accumulating autocorrelation matrixes of all pilot frequencies and averaging the accumulation to obtain a correlation matrix of an MIMO communication channel; carrying out noise power compensation on the obtained correlation matrix of the MIMO communication channel; carrying out eigenvalue decomposition on the compensated correlation matrix of the MIMO communication channel, and calculating a condition number of the correlation matrix of the MIMO communication channel based on the obtained eigenvalue as a correlation coefficient of the MIMO communication channel. The invention also provides a system for obtaining the correlation coefficient of the communication channel in the uplink MIMO. By using the technical scheme of the invention, the correlation matrix of the MIMO communication channel can be obtained by calculating the correlation matrix of the communication channel of pilot frequency data in uplink MIMO data, and then a condition number is obtained by carrying out the matrix eigenvalue decomposition to obtain the correlation coefficient of the MIMO communication channel.

Description

Technical field [0001] The present invention relates to the field of mobile communication, and in particular to a method and system for obtaining channel correlation coefficients in uplink MIMO (Multiple Input Multiple Output). Background technique [0002] Orthogonal Frequency Division Multiplex (Orthogonal Frequency Division Multiplex, referred to as OFDM), as a mobile communication system after the third generation, has been widely used in wireless local area networks because of its efficient spectrum utilization and good anti-multipath capabilities. (Wireless Local Area Networks, WLAN for short), Digital Audio Broadcasting (DAB), and Digital Video Broadcasting (DVB for short). In addition, the IEEE802.16 working group has also adopted OFDM technology in its air interface standards. [0003] In a traditional mobile communication system, the terminal usually uses one antenna, and the terminal and the network work in a single antenna mode. However, with the development of high-s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00
CPCH04B17/0042H04L5/0035H04L5/0023H04B7/0413H04B17/309
Inventor 郭军平刘宜佳
Owner ZTE CORP
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