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

Window function-based smooth carrier reservation OFDM signal peak-to-average power ratio suppression method

A window function and signal peak technology, which is applied in the field of peak-to-average ratio suppression of carrier reserved OFDM signals based on window function smoothing, can solve problems such as system performance degradation, out-of-band spectrum leakage, and influence of received signal bit error rate

Inactive Publication Date: 2015-11-04
CHANGAN UNIV
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shortcomings of their methods are: these two methods will have a greater impact on the bit error rate of the received signal, and will cause a larger out-of-band spectrum leakage, which will cause a sharp decline in system performance

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
  • Window function-based smooth carrier reservation OFDM signal peak-to-average power ratio suppression method
  • Window function-based smooth carrier reservation OFDM signal peak-to-average power ratio suppression method
  • Window function-based smooth carrier reservation OFDM signal peak-to-average power ratio suppression method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0048] The present invention embeds an OFDM frequency-domain symbol selection module before the discrete Fourier transform module of the original OFDM system, generates a reserved carrier signal by sending signal peak filtering, and combines it with the original carrier signal as a new OFDM frequency-domain symbol, thereby Reduce the peak-to-average ratio of the OFDM transmitting system. Refer to attached figure 1 , the specific implementation steps of the present invention are as follows:

[0049] (1) Initialization: set the peak-to-average ratio threshold A, carrier reservation set R and the maximum number of iterations T;

[0050] (2) The transmission carrier includes a data carrier and a reserved carrier, and the original transmission signal is on the data carrier; first, the transmission signal is subjected to serial-to-parallel conversion and quadrature...

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 window function-based smooth carrier reservation OFDM signal peak-to-average power ratio suppression method, firstly serial-to-parallel conversion and orthogonal amplitude constellation mapping are performed on sending signals, and OFDM modulation and parallel-to-serial conversion are performed on the mapped signals; secondly filtering is performed on residual signals whose amplitude exceeds a preset peak-to-average power ratio threshold, and the filtered residual signals are placed in a reversed carrier; and finally the signals on the reversed carrier and the sending signals are combined, and are transmitted after being amplified. The window function-based smooth carrier reservation OFDM signal peak-to-average power ratio suppression method provided by the invention can obtain relatively good peak-to-average power ratio performance with extremely low implementation complexity, effectively improves work efficiency of a radio frequency power amplifier, does not generate out-of-band radiation, and does not influence error rate performance of an OFDM system receiving end; and implementation of the method has nothing to do with the receiving end, does not need to additionally send sideband information to the receiving end, does not generate distortion inside and outside a band, can be directly compatible with existing standards, and can satisfy requirements of a modern communication system.

Description

【Technical field】 [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a carrier reservation OFDM signal peak-to-average ratio suppression method based on window function smoothing. 【Background technique】 [0002] Orthogonal frequency division multiplexing (OFDM) modulation technology has good anti-multipath ability and efficient frequency band utilization, and has become one of the key technologies of future wireless communication systems. At present, OFDM modulation technology has been widely used in the second type of high-performance LAN (High-Performance LAN type 2, HIPERLAN / 2), asymmetric digital subscriber loop (Asymmetric Digital Subscriber Line, ADSL), high-definition TV (High Definition Television, HDTV), and 3GPP (The 3rd Generation Partnership Project) Long Term Evolution (LTE) and other standards. [0003] However, there are still some important problems in the application of OFDM modulation technology that...

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): H04L27/26
CPCH04L27/2614
Inventor 赵祥模侯俊惠飞马峻岩史昕杨澜
Owner CHANGAN UNIV
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