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Antenna mode switching device and method for multi-antenna system

A multi-antenna system and antenna mode technology, applied in the field of wireless communication, can solve problems such as not having a clear

Inactive Publication Date: 2009-03-11
南通亘通智能设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there is no clear technical solution for how to select and switch among the above three antenna modes in the prior art

Method used

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  • Antenna mode switching device and method for multi-antenna system
  • Antenna mode switching device and method for multi-antenna system
  • Antenna mode switching device and method for multi-antenna system

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Embodiment Construction

[0062] The present invention will be described in detail below with reference to the drawings and embodiments.

[0063] figure 1 It is a flowchart of an antenna mode switching method of a multi-antenna system according to an embodiment of the present invention. Such as figure 1 As shown, the method includes the following steps:

[0064] 101: Set the initial antenna mode to transmit diversity mode;

[0065] In fact, the initial antenna mode can be set to any of the above three modes, but because in the initial state, the current best antenna mode of the system cannot be determined, and the antenna mode is switched between spatial multiplexing and beamforming The switching loss is relatively large, so the initial antenna mode is set to transmit diversity mode to minimize the switching loss in the case of insufficient information.

[0066] 102: Set the lower threshold of the number of quasi-channel conditions k SM And quasi-channel condition number upper threshold k BF ; And set t...

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Abstract

The invention provides an antenna mode switching method of a multiaerial system, which is applied to the multiaerial system supporting space multiplexing and beam forming antenna mode. The antenna mode switching method comprises the following steps: A: a channel matrix H is estimated at a receiving terminal, B: if the specific value ki of the maximum singular value Lambda max (H) of the channel matrix H and other singular values Lambda i (H) except the maximum singular value is equal to the minimum value min (ki) of Lambda max (H) / Lambda i (H), which is less than or equal to the lower limit threshold value kSM of the set standard channel condition number, so the antenna mode is switched to the space multiplexing mode; C: if the min (ki) is more than or equal to the upper limit threshold value kBF of the set standard channel condition number, the antenna mode is switched to the beam forming mode, wherein the ki is unequal to 1, i is equal to 1, 2, and the like, N-1, and N is the minimum value of sending the antenna number and receiving the antenna number. The invention discriminates the antenna switching mode through adopting two-stage judgement mode, thereby quickening the choosing and switching speed of the antenna mode, and improving the choosing and the switching accuracy of the antenna mode.

Description

Technical field [0001] The present invention relates to the field of wireless communication, in particular to an antenna mode switching device and switching method of a multi-antenna system. Background technique [0002] Compared with the traditional SISO (Single-Input Single-Output, single-input single-output) system, the MIMO (Multiple-Input Multiple-Output) system can provide a great capacity gain. The actual multi-antenna system is generally divided into three antenna modes: Beamforming (BF), Transmit Diversity (TD) and Spatial Multiplexing (SM). Because the main functions and goals of the above three modes are not the same, in the actual orthogonal frequency division multiplexing multiple antenna system, it is necessary to choose among these three modes to achieve the best performance. The optimal switching principle of the antenna mode of the multi-antenna system should be measured by the channel capacity and the system's bit error rate. Therefore, the switching method shou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/26
Inventor 郝东来
Owner 南通亘通智能设备有限公司
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