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

A kind of framing modulation method of multimedia broadcasting mobile signal

A technology for multimedia broadcasting and mobile signals, applied in multi-frequency code systems, shaping networks in transmitters/receivers, baseband system components, etc., can solve problems such as mutual interference, signal distortion, and system performance deterioration

Inactive Publication Date: 2011-12-14
陈春艳
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The high peak-to-average power ratio (PAPR) of 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 and signal spectrum changes. , resulting in the destruction of the orthogonality between the sub-channels, resulting in mutual interference and deteriorating 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
  • A kind of framing modulation method of multimedia broadcasting mobile signal
  • A kind of framing modulation method of multimedia broadcasting mobile signal
  • A kind of framing modulation method of multimedia broadcasting mobile signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] According to an embodiment of a certain transmitter of the multimedia broadcasting mobile signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0033] 1) The certain multimedia broadcast mobile signal transmitter forms an FFT data block in the frequency domain through symbol modulation and symbol rotation of its own input data bit stream, FFT represents fast discrete Fourier transform, and the length of the FFT data block is K; The symbol modulation is one of QPSK, 16QAM, 64QAM and 256QAM. The symbol constellation mapping method of symbol modulation adopts Gray code mapping; the symbol rotation is realized by rotating the symbol constellation at a certain angle. The QPSK symbol The rotation angle of the constellation diagram is 22.5 degrees, the rotation angle of the symbol constel...

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 multimedia broadcast mobile signal framing modulation method, and belongs to a time domain and frequency domain mixed framing modulation scheme. The multimedia broadcast mobile signal framing modulation method has the advantages of low peak-to-average power ratio, short synchronous time, channel fading resistance, controllable multi-service and the like.

Description

technical field [0001] The invention belongs to the field of mobile communication, and more specifically relates to a method for framing modulation of multimedia broadcasting mobile signals. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV multimedia broadcasting mobile transmission system, as an important part of digital TV mobile multimedia broadcasting, the development of its related technologies is closely related to people's quality of life, and therefore has received extensive attention from people. Digital TV, multimedia broadcasting, mobile-related technology and related industries are industries with rapid development and good market prospects in the field of communication and computer. In terms of digital TV multimedia broadcasting and mobile-related technologies, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile implementation solutions for digita...

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): H04L27/26H04L25/03
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner 陈春艳
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