Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Peak-to-average power reduction method

a power reduction and hybrid signal technology, applied in the field of peak-to-average power reduction in hybrid signal, can solve the problems of digital signal being unnecessary corrected, multiple subcarriers adding constructively or destructively almost at random, etc., and achieve the effect of reducing the papr in the hybrid signal

Inactive Publication Date: 2013-08-22
NAUTEL
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a method for detecting peaks in a signal that takes into account the contribution of each separately modulated signal. This helps in reducing the peak-to-average power ratio (PAPR) in the hybrid signal. The technical effect of this is improved detection of peaks and reduced PAPR.

Problems solved by technology

While it can be shown that OFDM provides substantial benefits in digital wireless communications, one of its main disadvantages is the fact that in the time domain the multitude of subcarriers add constructively or destructively almost at random.
However, this form of peak detection results in the digital signal being unnecessary corrected in a variety of circumstances and large corrections being applied when much less correction is required.

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
  • Peak-to-average power reduction method
  • Peak-to-average power reduction method
  • Peak-to-average power reduction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023]The following description is of one particular embodiment by way of example only and without limitation to the combination of features necessary for carrying the invention into effect.

[0024]As a representative example, description of the method is given using hybrid FM IBOC broadcast transmission. However, persons of ordinary skill in the art will readily understand that the general method, software and system can be applied to other hybrid transmission schemes that add two separately modulated signals, such as an OFDM signal and an existing transmission standard.

[0025]It should be also noted that the present invention can be carried out as a method, can be embodied in a system, a computer readable medium or an electrical or electro-magnetic signal.

[0026]As shown in FIG. 2, in a standard low level combined broadcast transmission system, the digital and analog signals 101, 102 of the FM IBOC broadcast transmission converge to form a hybrid signal. Each signal 101 and 102 is sep...

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 of reducing peak-to-average power in a hybrid signal is provided. The method determines peaks in power by defining a sample point by way of a digital vector and an analog vector. The digital and analog vectors are added together to generate a hybrid vector which is used to compare the sample point to the maximum desired peak threshold. An error vector is used to correct the sample point to a desired power level. Once the sample point has been corrected it can be added back to the analog signal and transmitted.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 12 / 810,146 filed on Jun. 22, 2010 and subsequently issued as U.S. Pat. No. 8,369,431 on Feb. 5, 2013, which is a U.S. national phase under 35 U.S.C. §371 of International Patent Application No. PCT / CA2008 / 000169 filed on Jan. 25, 2008. The disclosures of the foregoing patent applications and U.S. patent are hereby incorporated by reference herein in their respective entireties, for all purposes.FIELD OF THE INVENTION[0002]The present invention relates generally to a method for reducing peak-to-average power in a hybrid signal comprising first and second separately modulated signals. More specifically, the invention relates to a peak-to-average power method for use on a hybrid digital / analog radio frequency signal.BACKGROUND OF THE INVENTION[0003]In the United States, the In-Band On-Channel (IBOC) technology, referred to as HD Radio™, has been selected by the Federal Co...

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
Patent Type & Authority Applications(United States)
IPC IPC(8): H04L27/26
CPCH04B1/0475H04L27/2614H04L27/2623H04B2001/0416
Inventor WALKER, BRIANSCHMID, PHILIPP
Owner NAUTEL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com