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Low-complexity power distribution method based on beam forming of distributed MISO system

A beamforming and distribution method technology, applied in diversity/multi-antenna systems, space transmit diversity, advanced technologies, etc., to achieve the effect of simple calculation process and reduced time and space complexity

Active Publication Date: 2019-01-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention proposes a low-complexity power allocation method based on beamforming in a distributed MISO system, which solves the problem of distributed power while maximizing energy efficiency and reducing the complexity of calculation methods. Power Allocation Problem Based on Beamforming in Type MISO System

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  • Low-complexity power distribution method based on beam forming of distributed MISO system

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] 1. Distributed MISO system model:

[0027] as attached figure 2 The model diagram of the distributed MISO system in the embodiment of the present invention is shown, and the distributed MISO system includes N remote antenna units scattered in the cell, denoted as RAU n (n=1, 2, . . . , N), each remote antenna unit is equipped with L antennas, and is connected to the central processing unit through a specific transmission channel. In view of the limited size of the mobile station in practice, only a single antenna is considered. definition for RAU i channel vector to the mobile station, where d i for RAU i The distance to the mobile station, α is the path loss exponent, S i for RAU i shadow fading to the mobile station, h i for RAU i small-scale fading vector to the mobile station; define w i for RAU i The beamforming column vector of , and ||w i |...

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Abstract

The present invention discloses a low-complexity power distribution method based on beam forming of a distributed MISO (multi-input single-output) system. The energy efficiency in the distributed MISOsystem is taken as an optimal target, each remote antenna unit power distribution and beam forming vectors are optimal parameters to construct a system optimal model. The optimal beam forming schemewith the maximum ratio transmission is combined to obtain a form of the optimal solution of the optimal model according to a KKT condition; a Lambert function and a method of bisection are employed tosolve the optimal power distribution so as to achieve the maximum energy efficiency of the distributed MISO system. The low-complexity power distribution method based on beam forming of the distributed MISO system performs optimization design for the energy efficiency power distribution based on beam forming of the distributed MISO system, considers the large-scale fading in the reality on a channel, is simple and effective and can obtain energy effective performances being consistent to a traditional method while reducing the computing complexity.

Description

technical field [0001] The invention belongs to the field of mobile communication, and relates to a resource allocation method for mobile communication, in particular to a low-complexity energy-efficiency power allocation algorithm based on beamforming in a distributed multi-antenna system. Background technique [0002] With the growth of business volume and the continuous expansion of network capacity, the huge energy consumption of wireless communication networks and the environmental problems caused by them have become the focus of communication. In today's increasingly scarce resources, how to save energy, reduce emissions, and reduce energy consumption has become a research topic in the communication industry. a hot spot. In order to integrate green concepts such as environmental symbiosis and sustainable development into communication, the concept of "green communication" was born. The purpose of green communication is to reduce system energy consumption and utilize s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04W72/04
CPCH04B7/04Y02D30/70
Inventor 虞湘宾储君雅潘青
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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