Systems and methods for detecting the presence of a transmission signal in a wireless channel

A technology for transmitting signals and signals, which is applied in the field of detecting the existence of transmission signals and can solve problems such as undetected transmissions

Active Publication Date: 2009-09-16
QUALCOMM INC
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Devices within these systems may scan the spectrum of these channels in order to identify u

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
  • Systems and methods for detecting the presence of a transmission signal in a wireless channel
  • Systems and methods for detecting the presence of a transmission signal in a wireless channel
  • Systems and methods for detecting the presence of a transmission signal in a wireless channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] figure 1 A network configuration 100 according to one example of the present systems and methods is illustrated. Configuration 100 includes a plurality of base stations 110, 112, 114, 116, 118 and a plurality of user devices 108A through 108K. User devices 108A-108K may be cognitive radio devices, wireless devices, mobile stations, and the like. Configuration 100 also includes a plurality of service areas 150 , 152 , 154 , 156 , 158 . The first service area 150 includes a first base station 110 and a plurality of user equipments 108A to 108K. The first service area 150 may overlap with the second service area 152 , the third service area 154 , the fourth service area 156 , and the fifth service area 158 . As shown, some user devices may be located in service areas that are overlapped by different service areas.

[0025] A plurality of base stations 110, 112, 114, 116, 118 may provide services to user devices located in their respective service areas. For example, ...

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

A method for detecting the presence of a transmission signal in a wireless spectrum channel. The frequency of a signal is converted from a first frequency to a second frequency. The signal with the second frequency is filtered to remove signals that are not within the band of the second frequency. An averaged periodogram of the signal is calculated. A value of the averaged periodogram is comparedto a threshold. The presence of the transmission signal is detected, if the value of the averaged periodogram exceeds the threshold.

Description

[0001] Related applications [0002] This application relates to a patent application entitled "METHOD AND APPARATUS FOR SPECTRUM SENSING" filed on November 10, 2006 by inventor Stephen J. Shellhammer (Stephen J. Shellhammer) FOR WIRELESS COMMUNICATION), which is incorporated herein by reference. technical field [0003] The present invention relates generally to communications and techniques related to wireless communications. More specifically, the present invention relates to systems and methods for detecting the presence of transmission signals in wireless channels. Background technique [0004] Wireless communication networks are widely deployed to provide various types of services such as voice, packet data, broadcast, and so on. These wireless networks include, for example, Code Division Multiple Access 2000 (CDMA2000) networks, Global System for Mobile Communications (GSM) networks, Wideband Code Division Multiple Access (W-CDMA) networks and Worldwide Interoperab...

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): H04B1/46
CPCH04B1/46H04W24/00H04W4/18H04B7/155
Inventor 斯蒂芬·J·谢尔哈默
Owner QUALCOMM INC
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