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High-efficiency adaptive modulation method based on power allocation in distributed antenna system

A distributed antenna and adaptive modulation technology, applied in the field of mobile communication, to achieve the effect of reducing the number of searches, improving energy efficiency, and avoiding calculation

Active Publication Date: 2017-10-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

If only the modulation method is adaptive and the power is not adaptive, this is no different from frequency effect adaptation

Method used

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  • High-efficiency adaptive modulation method based on power allocation in distributed antenna system
  • High-efficiency adaptive modulation method based on power allocation in distributed antenna system
  • High-efficiency adaptive modulation method based on power allocation in distributed antenna system

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Embodiment Construction

[0028] In order to clarify the technical scheme and technical purpose of the present invention, the present invention will be further introduced below in conjunction with the accompanying drawings and specific implementation methods.

[0029] The hardware devices involved in the high-energy-efficiency adaptive modulation method in the distributed antenna system based on power allocation of the present invention include remote antennas distributed in different positions of the cell, and a central processing unit (CPU, Central Processing Unit) connected to each remote antenna , A mobile station (MS, Mobile Station) receiving service in the cell. In this embodiment, as attached figure 2 As shown, there are N t A remote antenna scattered in the cell, denoted as RA i ,i=1,...,N t . Each remote antenna is equipped with 1 antenna and is connected to the central processing unit through a specific transmission channel. A mobile station (MS) within a cell has one or more antennas....

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Abstract

The invention discloses a high-efficiency adaptive modulation method based on power allocation in a distributed antenna system. The maximum energy efficiency of the distributed antenna system is used as the optimization object, power and signal modulation modes of remote antennas of the distributed antenna system are used as optimization variables, an adaptive modulation switching threshold is obtained by using a modulation mode approximate bit error rate formula, then a general form of power allocation is provided, and search is performed in the modulation mode to find the optimal modulation mode and the power allocation thereof. By adoption of the method provided by the invention, the optimal power allocation of the remote antennas and the optimal setting of the signal modulation mode can be effectively obtained, moreover the algorithm flow is simple, and no complex function calculation is needed.

Description

Technical field: [0001] The invention belongs to the field of mobile communication, and relates to the design of a physical layer transmission scheme of a mobile communication system, in particular to an adaptive modulation method with high energy efficiency in a distributed antenna system based on power distribution. Background technique: [0002] With the continuous development of mobile communication technology, the number of mobile communication devices and the number of users are increasing rapidly, and the energy consumed by the mobile communication system is also increasing exponentially. Facing the increasingly tense global energy situation, research institutions at home and abroad are constantly seeking information transmission technologies with higher energy efficiency (EE, Energy Efficiency), and "green communication" has become a topic of widespread concern. Finding a transmission technology that can effectively improve the energy efficiency of the system is beco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0426H04L1/00H04L27/36
CPCH04B7/0426H04L1/0015H04L27/36Y02D30/70
Inventor 王郝虞湘宾储君雅文犇犇党小宇朱秋明
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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