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

Anti-interference radio signal framing modulation method for multimedia broadcast single-frequency network

A multimedia broadcasting and wireless signal technology, applied in multi-frequency code systems and other directions, can solve problems such as signal distortion, sub-channel orthogonality destruction, and system performance deterioration

Inactive Publication Date: 2011-11-09
广西良将自动化工程有限公司
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The high peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals has high requirements on the linear range of amplifiers and digital-to-analog converters. If the linear range of the system cannot meet the signal changes, it will cause Signal distortion changes the signal spectrum, destroys the orthogonality between sub-channels, generates mutual interference, and deteriorates system performance. It is necessary to consider how to reduce the occurrence probability of large peak power signals in OFDM signals and reduce non- Solutions for Linear Distortion Effects

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
  • Anti-interference radio signal framing modulation method for multimedia broadcast single-frequency network
  • Anti-interference radio signal framing modulation method for multimedia broadcast single-frequency network
  • Anti-interference radio signal framing modulation method for multimedia broadcast single-frequency network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] According to the embodiment of the single frequency network transmitter of the multimedia broadcast single frequency network anti-jamming wireless signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0031] 1) The network data manager of the single frequency network forms an FFT bit interleaving coded modulation data block in the frequency domain through multi-rate punctured convolution coding, bit interleaving, and symbol modulation of the input data bit stream, and FFT stands for Fast Discrete Fourier Transform , the length of the FFT bit-interleaved coding modulation data block is K; the coding rate of the multi-code rate punctured convolutional coding is one of 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / 8, and the bit interleaving Random interleaving is adopted, the symbol modulation is one of ...

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 an anti-interference radio signal framing modulation method for a multimedia broadcast single-frequency network. The method is a time domain / frequency domain / space domain hybrid framing modulation scheme. The anti-interference radio signal framing modulation method for the multimedia broadcast single-frequency network has the advantages of low peak to average power ratio, short synchronization time, anti-interference performance, multi-service controllability and the like.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to a method for framing and modulating an anti-jamming wireless signal of a multimedia broadcasting single frequency network. Background technique [0002] The high peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals has high requirements on the linear range of amplifiers and digital-to-analog converters. If the linear range of the system cannot meet the signal changes, it will cause Signal distortion changes the signal spectrum, destroys the orthogonality between sub-channels, generates mutual interference, and deteriorates system performance. It is necessary to consider how to reduce the occurrence probability of large peak power signals in OFDM signals and reduce non- Solutions for linear distortion effects. BICM technology (Bit Interleaved Coded Modulation, BICM) uses a bit interleaver and makes the coding and mod...

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(China)
IPC IPC(8): H04L27/26
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner 广西良将自动化工程有限公司
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