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A method for controlling the transmission power of a node in an af two-way relay communication system

A transmission power, two-way relay technology, applied in wireless communication, power management, electrical components, etc., can solve the problem of unable to adjust the transmission power of nodes

Active Publication Date: 2020-06-02
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, even if the transmitter in the system can obtain instantaneous CSI information, it cannot use real-time link information to adjust the node transmit power

Method used

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  • A method for controlling the transmission power of a node in an af two-way relay communication system
  • A method for controlling the transmission power of a node in an af two-way relay communication system
  • A method for controlling the transmission power of a node in an af two-way relay communication system

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Embodiment Construction

[0052] Such as figure 1 As shown, the source nodes A and B need to occupy two consecutive time slots of equal length to complete an information exchange. In the first time slot, the source nodes A and B need to check the inequality before transmitting their respective information Whether it is established, if not, according to

[0053] with

[0054] Calculate the respective transmit power, and then send their respective information to the relay node R at the same time. In order to complete the above operations, source nodes A and B need to know Z, λ 1 , Λ 2 , Q S with The value of. In fact, Z is related to the target rate of the source node; Is the maximum peak transmit power of the node; Q S The outage probability acceptable to the system is a system parameter. Therefore, source nodes A and B can know the parameters Z, Q S with The value of. λ 1 And λ 2 Is an exponential random variable|h AR | 2 And |h BR | 2 The rate parameters can be obtained through long-term observa...

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Abstract

The invention discloses a control method of node transmitting power of an AF two-way relay communication system. The system transmitting power minimization is taken as a target, a system QoS requirement and the node peak transmitting power constraint are taken as a condition, so that the transmitting power of a network node is dynamically adjusted according to instantaneous channel state information and a system target rate; and the minimization of the total transmitting power of the system is realized under a condition of satisfying the system QoS requirement and the node peak transmitting power constraint.

Description

Technical field [0001] The invention relates to an AF (Amplify-and-Forward) two-way relay communication system node transmitting power control method, which belongs to the technical field of wireless communication. Background technique [0002] In the 1970s, researchers proposed wireless relay communication, which uses relay to transmit information to improve communication quality, resist wireless channel fading, shadow effects, multipath effects, etc., expand communication range, and overcome mobile Issues such as limited terminal power consumption. In 1995, Telatar, Foschini, etc. of Bell Labs, based on the irrelevant Rayleigh fading channel, under the assumption that the optimal codec and the receiver can accurately predict the channel state information (CSI) of the transmitter, the theory proved that the receiver The use of multi-antenna (Multi-Input Multi-Output, MIMO) technology at the end and the sending end can double the capacity of the communication link. Although MIM...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/04
Inventor 吉晓东包志华章国安曹张华
Owner NANTONG UNIVERSITY
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