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Method for applying layer modulation technique in T-MMB system

A layered modulation and mobile multimedia technology, applied in multi-carrier systems, electrical components, broadcasting, etc., can solve the problems that users cannot receive services normally

Inactive Publication Date: 2010-01-06
NUFRONT MOBILE COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Due to the limitation of transmission power or the influence of complex ground environment and high-order modulation, users cannot receive services normally in some places

Method used

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  • Method for applying layer modulation technique in T-MMB system
  • Method for applying layer modulation technique in T-MMB system
  • Method for applying layer modulation technique in T-MMB system

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Experimental program
Comparison scheme
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Embodiment Construction

[0052] Now, preferred embodiments of the present invention will be described in detail.

[0053] The specific implementation method of transmitting / receiving T-MMB service by adopting layered modulation technique for T-MMB service is explained as follows:

[0054] FIG 0 / 15 is reserved in DAB, and is used to indicate sub-channel information of new services in the T-MMB system, such as Figure 6 The ModuType field shown is used to indicate the modulation method, and the meaning of the 11 field is reserved. It is now modified to 11 to indicate the layered modulation, as follows:

[0055] ModuType (modulation type): This 2-bit flag is used to indicate the modulation method, as follows:

[0056] b1 b0

[0057] 0 0: DQPSK;

[0058] 0 1: 8DPSK;

[0059] 1 0: 16DAPSK;

[0060] 1 1: Layered modulation is used.

[0061] FIG 0 / 23 is reserved in DAB and is now used to indicate the parameter information for applying layered modulation in the T-MMB system, such as Figure 7 As shown,...

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Abstract

A method for applying lamination modulation technique in T-MMB system includes separating T-MMB service to be high priority code stream and low priority code stream being interlaced to be one set of code stream and carrying out mapping as per lamination information in FIC as well as emitting mapped code stream out by antenna at emitting end, filtering out parameter required by lamination modulation by tuner according to decoding FIC and relevant information and decoding each sub-channel according to obtained lamination modulation information at receiving end.

Description

technical field [0001] The invention provides a method for transmitting / receiving mobile multimedia digital broadcasting system (T-MMB) service, more specifically, a method for transmitting / receiving T-MMB service using layered modulation technology. Background technique [0002] With the improvement of living standards, people's requirements for broadcasting sound quality are getting higher and higher. So broadcasting began to change from AM to FM, from analog broadcasting to digital broadcasting. In particular, the emergence of digital broadcasting has become a turning point in the history of broadcasting development, which has revolutionary significance in terms of this field. The emergence of digital broadcasting is actually to overcome the limitations of the sound quality provided by FM broadcasting in the past. At present, digital audio broadcasting (DAB) has been operated in Europe, Canada, the United States and other places, and my country has also made great effort...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/34H04H1/00H04H20/00
Inventor 鲍东山王桥张荣沈峰磊袁君
Owner NUFRONT MOBILE COMM TECH