A kind of framing modulation method of multimedia mobile broadcasting signal

A mobile broadcasting and multimedia technology, applied in multi-frequency code systems, shaping networks in transmitters/receivers, digital transmission systems, etc., can solve problems such as system performance deterioration, signal spectrum changes, and mutual interference

Inactive Publication Date: 2011-12-14
董海玲
View PDF4 Cites 1 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 ch

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 mobile broadcasting signal
  • A kind of framing modulation method of multimedia mobile broadcasting signal
  • A kind of framing modulation method of multimedia mobile broadcasting signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] According to an embodiment of a certain transmitter of the multimedia mobile broadcast signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0035] 1) The certain multimedia mobile broadcast signal transmitter forms an FFT coded data block in the frequency domain through serial concatenated multi-rate punctured convolution coding, symbol modulation and symbol rotation on its input data bit stream, and the FFT Indicates the fast discrete Fourier transform, and the length of the FFT coded data block is K; the serial concatenated multi-rate punctured convolutional code is formed by two convolutional codes through random interleaving and serial concatenated puncture, and the serial concatenated multiple The coding rate of the code rate punctured convolutional coding is one of 1 / 4, 4 / 9,...

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 mobile broadcast signal framing modulation method and in particular relates to a framing modulation scheme with mixing of time domains and frequency domains. The multimedia mobile broadcast signal framing modulation method has the advantages that the peak-average power ratio is low, the synchronization time is short, the fading noise influence is avoided, and the multiple services can be controlled 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 and modulating a multimedia mobile broadcast signal. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV mobile multimedia broadcasting 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 mobile multimedia broadcasting related technologies and related industries are industries with rapid development and good market prospects in the field of communication and computer. In terms of technologies related to digital TV multimedia mobile broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile implementation solutions for digital ...

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): H04L27/26H04L25/03H04L1/00
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner 董海玲
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