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Bidirectional relay system power distribution method based on AF (Amplify-and-Forward) mechanism

A two-way relay and allocation method technology, applied in power management, diversity/multi-antenna systems, location diversity, etc., can solve problems such as link state changes, spectrum resource occupation, and energy resource consumption

Active Publication Date: 2015-08-12
NANTONG UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In this process: on the one hand, the feedback channel needs to be used to occupy spectrum resources, and the feedback of link information also needs to consume energy resources; on the other hand, due to the time-varying nature of the channel, when the channel changes rapidly, the receiver estimates and The link state may have changed after the estimated link information was fed back to the transmitter

Method used

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  • Bidirectional relay system power distribution method based on AF (Amplify-and-Forward) mechanism
  • Bidirectional relay system power distribution method based on AF (Amplify-and-Forward) mechanism
  • Bidirectional relay system power distribution method based on AF (Amplify-and-Forward) mechanism

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Embodiment Construction

[0075] like figure 1 As shown, the source node N A and N B To complete an information exchange, two consecutive time slots of equal length need to be occupied. first time slot, N A and N B Before transmitting the respective information, it is necessary to first check that k=λ 2 / λ 1 value, and then check whether the inequality (1), (3), (5), (6) or (7) is true, and if it is true, calculate the respective transmit power, and then send their respective information to the relay node N at the same time R . In order to complete the above operations, N A and N B need to know z, λ 1 ,λ 2 , Q S and the value of P. where z=2 2r -1; P is the maximum peak transmit power of the transmitter; Q S is the acceptable outage probability of the system, which is a system parameter. Therefore, N A and N B Ability to know the parameters z, Q in advance S and the value of P. lambda 1 and lambda 2 Is the statistical value of the channel, which can be regarded as an exponential r...

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Abstract

The invention discloses a bidirectional relay system power distribution method based on an AF (Amplify-and-Forward) mechanism, which is suitable for a bidirectional relay system based on the AF mechanism. According to the method, the system QoS (Quality of Service) requirement and transmitter peak transmitting power limit are taken as constraint conditions, and the target is to minimize the system total transmitting power. The transmitting power of a transmitter is dynamically adjusted by means of a channel statistical value according to the requirement of a source node on the data rate, so that the system total transmitting power is minimized under the condition that the system QoS requirement and the transmitter peak transmitting power limiting condition are met.

Description

technical field [0001] The invention relates to a two-way relay system power allocation method based on an AF (amplify-and-forward, AF) mechanism, with the purpose of minimizing the total transmission power of the system, and belongs to the technical field of wireless communication. Background technique [0002] In the 1970s, researchers proposed wireless relay communication, that is, the transmission of information in the form of relay to improve communication quality, resist the influence of wireless channel fading, shadow effect, multipath effect, etc., expand the communication range, and overcome mobile communication. Terminal power consumption is limited and other issues. In 1995, Telatar, Foschini, et al. of BELL Laboratory, aiming at uncorrelated Rayleigh fading channels, theoretically proved that the receiver and the transmitter use multiple An antenna (Multi-Input Multi-Output, MIMO) technology can double the capacity of a communication link. Although MIMO technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/26H04B7/02
CPCH04B7/026H04W52/265
Inventor 吉晓东包志华章国安曹张华
Owner NANTONG UNIVERSITY
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