Sub-carrier remaining method for reducing peak-to-average power ratio and bit error rate in combined way

A technology of bit error rate and peak-to-average ratio, applied in the field of orthogonal frequency division multiplexing, which can solve the problems that do not involve the performance of system bit error rate and the large amount of calculation.

Inactive Publication Date: 2011-09-14
UNIV OF SCI & TECH OF CHINA
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the optimal shear threshold required for generating the shear noise sequence still requires computationally intensive software simulation to obtain, and the limited number of reserved subcarriers and the limite

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
  • Sub-carrier remaining method for reducing peak-to-average power ratio and bit error rate in combined way
  • Sub-carrier remaining method for reducing peak-to-average power ratio and bit error rate in combined way
  • Sub-carrier remaining method for reducing peak-to-average power ratio and bit error rate in combined way

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1:

[0020] figure 1 A schematic block diagram of the flow principle of the subcarrier reservation method for reducing peak-to-average ratio and bit error rate in the orthogonal frequency division multiplexing system of the present invention is given; the upper half is a schematic block diagram of the flow principle in the transmitter, and the lower half is The part is a schematic block diagram of the flow principle in the receiver.

[0021] Such as figure 1 As shown in: in the transmitter, the user subcarrier data symbol sequence 1 is multiplied by the user Fourier transform matrix step 2 to generate the N-point user time-domain orthogonal frequency division multiplexing sequence, and the shear wave noise sequence is generated by the wave cutter 3. After the mapping function and scaling step 4, the sequence adder 5 generates a low peak-to-average ratio transmission sequence. The signal amplified by the high-power amplifier module 6 is sent through the transmitter ...

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 discloses a sub-carrier remaining method for reducing a peak-to-average power ratio and a bit error rate in a combined way. The sub-carrier remaining method is characterized in that a closed mathematical expression is used for providing an optimum wave-shearing threshold and reducing the peak-to-average power ratio by linear operation in a transmitter, thereby operating a wave-shearing noise sequence by a linear mapping function to generate a sending sequence with the low peak-to-average ratio, and furthermore, a simple expression of the optimum wave-shearing threshold required when generating the wave-shearing noise sequence is provided; and a nonlinear distortion counteracting method for reducing a peak value and assistings a subcarrier wave sequence is introduced in a receiver so as to reduce the bit error rate of a system. The sub-carrier remaining method overcomes the defect that the existing method requires complex nonlinear operation to generate the sending sequence with the low peak-to-average power ratio and needs complex software simulation to generate the optimum wave-shearing threshold and the nonlinear distortion, so that the bit error rate is high. By adopting the sub-carrier remaining method, the peak-to-average power ratio can be reduced only by linear operation, and the bit error rate of the system can be reduced obviously, so that the calculation complexity is reduced greatly, and the performance of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of orthogonal frequency division multiplexing in mobile communication, and particularly relates to a joint technology for reducing peak-to-average ratio and alleviating non-linear distortion so as to reduce system bit error rate. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) technology is widely used in the field of mobile communication at present. Among them, how to reduce the peak-to-average ratio of the transmitter and how to alleviate the nonlinear distortion caused by the high-power amplifier to improve the bit error rate performance of the receiver is one of the hot spots and focuses of OFDM technology. [0003] According to the "International Institute of Electronics and Electrical Engineers Wireless Communications Journal" (IEEE Transactions on Wireless Communications, vol.8, Issue.5, 2009, Page(s): 2417-2423), the peak cancellation time-domain sequence through const...

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
Inventor 李占亚张文逸陈晓辉王卫东
Owner UNIV OF 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