Terminal-oriented multimode terminal cognitive radio technology

A cognitive radio and multi-mode terminal technology, applied in the field of multi-mode terminal cognitive radio, can solve problems such as waste, uneven allocation of spectrum resources, and low resource utilization

Inactive Publication Date: 2014-05-14
江苏智融高科信息科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The contradiction between the increasing demand for spectrum and the limited spectrum resources is the main bottleneck restricting the development of wireless communication. However, according to the survey, the utilization rate of spectrum resources in the licensed frequency band is currently at a very low level. Wireless commu...

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
  • Terminal-oriented multimode terminal cognitive radio technology
  • Terminal-oriented multimode terminal cognitive radio technology
  • Terminal-oriented multimode terminal cognitive radio technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] It works like this,

[0028] In this simulation we mainly use the MATLAB platform, in the signal bandwidth W =50000, sampling frequency Fs=2 W =2*50000, the number of repetitions count=5000. When the signal-to-noise ratio is the same, we compared the results of single-user, 3-user and 5-user cooperative perception respectively. figure 2 and image 3 It shows that in the case of the same SNR and the same false alarm probability, the detection probability of the "AND" fusion criterion increases with the increase of the number of users, but with the further increase of the number of cognitive nodes, the detection probability decreases. The growth is very limited because the "AND" criterion is that the sensing system will confirm that the spectrum is being occupied by the primary user if and only if all the cognitive nodes detect the signal of the primary user. Therefore, the "AND" criterion will not easily lead to the judgment of the existence of the main user signal,...

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 relates to a cognitive radio, frequency spectrum sensing, frequency spectrum detection and wireless network technology, especially relates to a terminal-oriented multimode terminal cognitive radio technology. The cognitive radio technology is an effective method for solving the problem of the shortage of frequency spectrum resources in a wireless application environment. Frequency spectrum detection technology of main user idle frequency spectrum sensing is an indispensable technology in a cognitive radio network, the capability of a cognitive user to detect main user frequency spectra is limited by a multipath effect and a shadow effect, and as a result, frequency spectrum detection probability is low. The invention provides a cooperative-type frequency spectrum detection scheme in which five cognitive user cooperative mechanisms are adopted. With the cooperative-type spectrum detection scheme adopted, mathematical formulas of global error false alarm probability and global detection probability under two kinds of fusion criterions of an OR criterion and an AND criterion can be deduced, and a relation schema of detection probability and signal to noise ratio under the two kinds of fusion criterions can be obtained. Simulation results show that the detection scheme provided by the invention can improve the efficiency of main user frequency spectrum detection performed by the cognitive user.

Description

technical field [0001] The present invention relates to a cognitive radio, spectrum sensing, spectrum detection, and wireless network technology, in particular to a terminal-guided multi-mode terminal cognitive radio technology. Background technique [0002] The contradiction between the increasing demand for spectrum and the limited spectrum resources is the main bottleneck restricting the development of wireless communication. However, according to the survey, the utilization rate of spectrum resources in the licensed frequency band is currently at a very low level. Wireless communication is facing Very big challenge [1]. Radio spectrum resources are generally authorized and allocated by the government. This management method of fixed allocation of spectrum often leads to uneven allocation of spectrum resources, and even wasteful situations. This contradicts the increasingly serious problem of spectrum shortage. As an intelligent spectrum sharing technology, cognitive rad...

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): H04B17/00H04B17/382
Inventor 徐晓声
Owner 江苏智融高科信息科技有限公司
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