Method, system and apparatus for uplink array signal processing

An array signal and array technology, applied in the field of downlink array signal processing, can solve the problems of downlink beamforming gain reduction and system performance deterioration

Active Publication Date: 2009-07-15
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0007] In view of this, an embodiment of the present invention provides a downlink array signal processing method, which is applied to a communication system including at least two antenna arrays, and is used to solve the problem of the downlink beam when at least two antenna arrays are used to process downlink signals independently. The problem of reduced shaping gain or when at least two antenna arrays are used to jointly process downlink signals, the problem of system performance degradation caused by the correlation crossing of uplink and downlink channels

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Embodiment Construction

[0027] An embodiment of the present invention provides a method for processing downlink array signals according to channel change information. The purpose of the method is to select whether to jointly process downlink array signals with at least two arrays or perform at least two arrays according to the actual situation of the downlink channel. independent processing of downlink array signals. In this embodiment, it is assumed that at least two antenna arrays can be calibrated jointly to offset the amplitude and phase differences of different channels. refer to image 3 , the specific execution steps are as follows:

[0028] Step 301: Estimate at least one channel state parameter.

[0029] In this embodiment, the channel state parameters include: the moving speed of the mobile terminal, channel related parameters, Doppler frequency offset of the channel, and the like. Any one or two channel state parameters can be estimated, and multiple channel state parameters can also be...

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Abstract

The invention discloses a method for processing downlink array signal, and is applied in a communication system comprising at leas two antenna arrays. The method of the invention can obtain better array gain signal and can increase the system stability. The method comprises the following steps: estimating at least one channel state parameter, comparing the estimated value of at least one channel state parameter with a corresponding preset threshold parameter value, confirming the mode for processing the downlink array signal according to the comparing result, and processing the downlink array signal according to the confirmed mode, wherein the mode comprises executing combined beamforming of at least two arrays to the downlink array signal or executing independent beamforming of at least two arrays to the downlink array signal. The invention also discloses a system for processing downlink array signal and a base station thereof.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method, system and device for downlink array signal processing. Background technique [0002] The multi-antenna array in the multi-antenna array mobile communication system includes at least two antenna arrays, and the distance between the antenna arrays is far enough that it can be considered that the channels between the antenna arrays and the terminal are relatively independent, figure 1 for two independent antenna arrays. Of course, dual-polarized antenna arrays can also be used, see figure 2 , this array uses a ±45° cross-polarized array instead of two independent antenna arrays. In this array, the signals of the +45° polarized antenna array and the signals of the -45° polarized antenna array are weakly correlated. [0003] Currently, the processing of downlink signals is generally performed independently among independent antenna arrays. Due to th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04L25/02H04W88/08
Inventor 孙长果毕海蔡月民任世岩
Owner DATANG MOBILE COMM EQUIP CO LTD
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