Signal transmitting method and system used for digital multimedia broadcasting

A signal transmission system and multimedia broadcasting technology, which is applied in the field of wireless communication, can solve the problems of no mapping relationship between time slices, long channel switching time, and convergence errors, etc., to improve system synchronization capabilities and frequency offset correction capabilities, and complicate packaging processing The effect of low degree and shortened synchronization time

Inactive Publication Date: 2007-08-22
HUAWEI TECH CO LTD
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Problems solved by technology

Therefore, the iterative approximation algorithm needs to be used in the DVB-H standard, which causes the problems of convergence error and time consumption, so the use of DVB-H technology will cause longer synchronization time
Moreover, when the signal is sent in BURST mode, the shortcoming of DVB-H technology's long synchronization time is particularly obvious
[0006] In addition, DVB-H follows the physical layer frame structure in DVB-T, and the time-slice (time-s

Method used

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  • Signal transmitting method and system used for digital multimedia broadcasting
  • Signal transmitting method and system used for digital multimedia broadcasting
  • Signal transmitting method and system used for digital multimedia broadcasting

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[0101] Based on the above detailed description, a specific implementation example of the invention is described below:

[0102] The sampling frequency of the digital multimedia signal transmission system can be set to 7.56MHz, the number of sampling points of OFDM data is 3780 points, and the length of the guard interval is 420 points. A super frame is composed of 3,600 OFDM symbols and has a duration of 2 seconds. The super frame includes a super frame prefix, a super frame control information, and 8 program framing. One superframe prefix occupies 1 OFDM symbol, and one superframe control information occupies 7 OFDM symbols.

[0103] Among them, the duration of a program framing and the number of programs included can be determined according to actual operation conditions, and are indicated to the receiving terminal in the superframe information. One program framing prefix occupies one OFDM symbol, and one program framing control information occupies one OFDM symbol.

[0104] The...

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Abstract

A signal transmission system used on digital multimedia broadcast comprises source adaptive buffer storage for buffer-storing data sent from source and for sending data to channel modulator, channel modulator for carrying out coding-modulation on received data and for sending coding-modulated data out, channel demodulator for carrying out decoding-modulation on received data and information sink buffer storage for buffer-storing received data.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more particularly, to a signal transmission method and system for digital multimedia broadcasting. Background technique [0002] Since entering the 21st century, wireless communication technology is developing at an unprecedented speed. With the increase of users' demand for various real-time multimedia services and the rapid development of Internet technology, the future wireless communication technology will have a higher information transmission rate to provide users with greater convenience. In order to support higher information transmission rate and higher mobile speed of users, wireless transmission technology with higher spectral efficiency and stronger anti-multipath interference capability is required in the next generation of wireless communication. Among various wireless schemes that provide high-speed transmission at present, multi-carrier modulation techn...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04L29/06H04L27/26
Inventor 肖蛰水张毅
Owner HUAWEI TECH CO LTD
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