Power allocation algorithm for UAV relay system based on energy efficiency optimal criterion

A relay system and distribution algorithm technology, applied in radio transmission systems, power management, transmission systems, etc., can solve problems such as high computational complexity and difficulty in obtaining closed-form solutions

Active Publication Date: 2018-07-03
NANJING UNIV OF POSTS & TELECOMM
View PDF5 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A multi-objective algorithm [7] is proposed to implement a user selection and power allocation scheme, so as to minimize the transmit power while ensuring the maximum throughput. The problem of maximizing the total energy efficiency of the weight is studied. By solving the system carrier and the Power allocation can maximize the energy efficiency of weights, and two algori

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Power allocation algorithm for UAV relay system based on energy efficiency optimal criterion
  • Power allocation algorithm for UAV relay system based on energy efficiency optimal criterion
  • Power allocation algorithm for UAV relay system based on energy efficiency optimal criterion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0118] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0119] Such as figure 1 As shown, the present invention provides a power allocation algorithm based on the optimal criterion of energy efficiency for the unmanned aerial vehicle relay system, comprising the following steps:

[0120] Step 1: Establish a UAV-based relay transmission system model;

[0121] In the first time slot, the transmitting end S transmits the transmitted signal x(t) through beamforming, and the signal received at the relay end R can be expressed as

[0122]

[0123] P 1 is the signal transmission power of the transmitter S, formula h H The superscript H in is the conjugate transpose operator, w 1 =[w 1,1 w 1,2 …w 1,M ] T is the transmit beamforming weight vector of M×1, satisfying || || F Represents the Frobenius norm, x(t) is the transmitted signal and satisfies E(|x(t)| 2 )=1,n 1 with mean equal to 0 and variance equal ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a power allocation algorithm for a UAV (unmanned aerial vehicle) relay system based on an energy efficiency optimal criterion. Firstly, based on a double-hop amplification andrelay transmission model, an optimization model of power allocation is established, and a power allocation problem is converted into an optimization problem of the solution of maximum system energy efficiency. In the process of solving the optimal power allocation, firstly transmitted signal power is fixed to obtain a beamforming optimization scheme. Then, by a large signal-to-noise ratio intervalapproximation, an original non-convex optimization problem is converted into a convex optimization problem. Finally, a KKT condition is used, and a closed form solution of a power allocation scheme is calculated and obtained. A simulation experiment shows that the closed form solution obtained by the algorithm disclosed by the present invention is close to a loop iterative method, and thus the algorithm complexity is reduced.

Description

technical field [0001] The invention belongs to the field of unmanned aerial vehicle relay communication, relates to the energy efficiency of relay communication, power distribution, beam forming, convex optimization in the optimization method, and can be used in practical engineering fields such as unmanned aerial vehicle battlefield reconnaissance and environmental monitoring. Background technique [0002] In recent years, wireless relay technology has received sufficient attention and development. Compared with the traditional single-hop communication, the multi-hop communication technology of relay-assisted transmission can significantly expand the coverage of the communication network, improve the reliability of the communication system and increase the communication capacity of the system. Although communication satellites can realize relay communication functions, they are expensive, have large transmission delays, long construction periods, high maintenance costs, an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04W16/28H04W52/24H04W52/30H04W52/34H04W52/46H04B7/185
CPCH04B7/18504H04W16/28H04W52/241H04W52/30H04W52/34H04W52/46
Inventor 严晓琴颜俊朱卫平
Owner NANJING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap