Transmitting device, transmitting method and transmitting system for digital broadcast signal

A signal transmission device and digital broadcast technology, applied in the field of digital broadcast signal transmission device and digital broadcast signal transmission system, can solve the problems of fixed modulation mode, low utilization rate of frequency resources, inflexibility, etc.

Inactive Publication Date: 2009-11-18
NUFRONT MOBILE COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The modulation method is fixed and very inflexible;
[0006] 2. Only low-order differential modulation is used, and the utilization rate of frequency resources is low

Method used

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  • Transmitting device, transmitting method and transmitting system for digital broadcast signal
  • Transmitting device, transmitting method and transmitting system for digital broadcast signal
  • Transmitting device, transmitting method and transmitting system for digital broadcast signal

Examples

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Embodiment Construction

[0018] figure 1 It shows a structure of a digital broadcast signal sending device, which includes at least one first encoding unit S11, at least one time domain interleaving unit S12, first multiplexing unit S13, second encoding unit S14, differential modulation Unit S15 and frame generation sending unit S16.

[0019] Each first encoding unit S11 is used to perform forward error correction encoding on data in a sub-channel, each time domain interleaving unit S12 receives encoded data output by a first encoding unit S11, and performs encoding on the encoded data Time domain interleaving.

[0020] The first multiplexing unit S13 is configured to multiplex the interleaved data output by each time domain interleaving unit S12 into MSC data. The second encoding unit S14 is configured to perform forward error correction encoding on the second group of data information to obtain FIC data. The differential modulation unit S15 is used to differentially modulate the FIC data by adopt...

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Abstract

The invention relates to a transmitting device for a digital broadcast signal, which comprises at least one first coding unit, at least one time domain interweaving unit, a first multiplexing unit, a second coding unit, a differential modulation unit and a frame generation transmitting unit, wherein each first coding unit is used for performing forward error correction coding on data in a sub-channel; each time domain interweaving unit receives data output by the first coding unit, and performing time domain interweaving on the coded data; the first multiplexing unit is used for multiplexing the interwoven data output by various time domain interweaving units into MSC data; the second coding unit is used for performing forward error correction coding on a second set of data to obtain FIC data; the differential modulation unit is used for performing differential modulation on the FIC data by a first modulation mode, and performing differential modulation on the MSC data by a second modulation mode, wherein the modulation grade of the first modulation mode is lower than that of the second modulation mode; and the frame generation transmitting unit generates a signal unit transmission frame by using a differential modulation symbol sequence generated by the differential modulation unit and transmits the signal unit transmission frame.

Description

[0001] This application claims the priority of the patent application whose application number is 200810097236.6, the application date is May 7, 2008, and the invention name is "Transmission method and transmission device for ground mobile multimedia broadcasting". The content of this patent application is included in this application. There are manifestations. technical field [0002] The present invention relates to the technical field of mobile multimedia broadcasting, in particular to a digital broadcasting signal sending device, and also to a digital broadcasting signal sending method and a digital broadcasting signal sending system. Background technique [0003] Currently, the world's mainstream mobile TV / mobile multimedia broadcasting transmission standards include Digital Audio Broadcasting (Digital Audio Broadcast, DAB) series standards, Digital Video Broadcasting Handheld (DVB-H) standards and MediaFLO standards. In terms of channel bandwidth, the DAB series standa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L27/26H04L27/18H04H60/90H04N19/89
CPCH04L1/0041H04L1/0071H04L27/2627H04L1/0072H04N7/24H04N19/89
Inventor 鲍东山李旭明刘飞王斌姚洋王加庆
Owner NUFRONT MOBILE COMM TECH
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