Optimal joint power allocation method based on AF (amplify-forward) cognitive relay cooperative transmission

A cooperative transmission and joint power technology, applied in power management, wireless communication, electrical components, etc., can solve problems affecting direct link transmission, direct link interference, etc.

Active Publication Date: 2015-07-01
UNIV OF ELECTRONIC SCI & TECH OF CHINA
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there is a disadvantage of independent transmission of the direct link and the relay auxiliary link under this cognitive network: three time slots are required for the cognitive sender to serve two cognitive receivers
However, when the coordinated transmission of the relay auxiliary link and the direct link is in the second time slot, the relay transmission will interfere with the direct link and affect the transmission of the direct link.

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
  • Optimal joint power allocation method based on AF (amplify-forward) cognitive relay cooperative transmission
  • Optimal joint power allocation method based on AF (amplify-forward) cognitive relay cooperative transmission
  • Optimal joint power allocation method based on AF (amplify-forward) cognitive relay cooperative transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The technical solution of the present invention will be described in detail below in combination with the embodiments and the accompanying drawings.

[0037] Such as figure 1 As shown, a system where the main network and the cognitive network coexist.

[0038] In the first time slot, CT transmits data to SR, and CR2 also receives the information at the same time. In order to eliminate the interference between users CR1 and CR2 as much as possible and improve the throughput of the cognitive system, it is assumed that if CR2 receives the CR1 signal and reaches its decodable SINR threshold γ th , then CR2 can correctly decode the signal transmitted from the CT terminal to CR1, and the correct decoding result is used for subsequent interference cancellation, otherwise it cannot be decoded.

[0039] Suppose the maximum transmit power of CT is P C,max , CT with power p 1 Sending a signal, the SINR received by SR is expressed as The interference power of CT to PR is I 1...

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 belongs to the technical field of mobile communication and particularly relates to an optimal joint power allocation method based on AF (amplify-forward) cognitive relay cooperative transmission. According to the method, in a half-duplex cognitive relay system with a direct link and a relay-aided link coexisting, a direct link transmission time slot is combined with a second time slot of a half-duplex cognitive relay by CDR (coordinate direct-and-relay) transmission of the relay-aided link and the direct link, and interference of the relay on a receiving end of the direct link is eliminated by ANC (analog network coding), so that time slot resources are fully utilized to achieve optimal power distribution among transmitting nodes.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to an algorithm for jointly optimizing power distribution of a cognitive transmitter and a cognitive relay in an amplify-forward (AF) cognitive relay system. Background technique [0002] Cognitive Radio (CR) is a new type of radio that can reliably sense the spectrum environment over a wide frequency band, detect the emergence of legitimate authorized users (primary users), and adaptively occupy immediately available local channels. At the same time, no harmful interference will be brought to the main user during the whole communication process. [0003] In order to further improve signal coverage, transmission rate and spectrum efficiency, relay technology is introduced into the cognitive system. The principle of the half-duplex relay is simple. Transmitting and receiving on different time slices or two orthogonal frequencies will not introduce the influe...

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): H04W52/04
Inventor 曾招云陈智李跃峰梁恒菁
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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