Data stream allocation system of digital broadcast transmitter and its allocation method

A multi-transmitter, digital broadcasting technology, applied in the field of digital information transmission, can solve the problems of high overall system cost and large amount of information processing of sub-transmitters, and achieve the effect of reducing information processing pressure

Inactive Publication Date: 2009-09-02
TIMI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a digital broadcasting system that needs to be equipped with multiple sub-transmitters, each sub-transmitter needs to perform the above-mentioned channel coding independently, so that the information processing capacity of the sub-transmitter is large and the overall system cost is high

Method used

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  • Data stream allocation system of digital broadcast transmitter and its allocation method
  • Data stream allocation system of digital broadcast transmitter and its allocation method
  • Data stream allocation system of digital broadcast transmitter and its allocation method

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Embodiment Construction

[0033] Below, preferred embodiments of the present invention will be described in detail in conjunction with the accompanying drawings.

[0034] image 3 Shown is a schematic diagram of a digital broadcast multi-transmitter data stream distribution system according to a first embodiment of the present invention. Such as image 3 As shown, the first embodiment of the present invention is a satellite mobile broadcasting system. The satellite mobile broadcasting system consists of an OFDM modulator 33, a first Ku-band uplink station 34, a packet processing device 35, a DVB-S modulator (not shown), a second Ku-band uplink station 36, a satellite 37 and a transponder 38. .

[0035] The satellite mobile broadcasting system uses a 25MHz bandwidth and is divided into three 8MHz channels, and each 8MHz channel transmits one OFDM modulation signal. The three 8MHz channels are named Channel 0, Channel 1, and Channel 2 respectively. The system sampling rate is 60MHz.

[0036] Each f...

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Abstract

The invention discloses a data flow distribution system and method of a digital broadcast multichannel transmitter. The system comprises the following parts: an OFDM modulation device, a delay device, a main transmitter, a package processing device, a distribution network, and a secondary emission. The distribution method comprises the following steps: dividing the data flow of the channel code into two paths; transferring a path data flow to the main transmitter with OFDM modulation device and the client with the main transmitter after a path data flow is proceeded with OFDM modulation and delayed the finite time by the delaying device; making the other path data flow proceed with package processing with the package processing device and transferring to the secondary transmitter by the distribution network and the client in the secondary transmitter after OFDM modulation. The invention reduces the information processing pressure of the secondary transmitter.

Description

technical field [0001] The present invention relates to the technical field of digital information transmission, in particular to a digital broadcast multi-transmitter data flow distribution system and distribution method based on OFDM (Orthogonal Frequency Division Multiplexing). Background technique [0002] Currently, digital broadcasting has become an indispensable part of people's daily life. In addition to the characteristics of wide coverage and large program capacity, digital broadcasting is also broadcast, which can realize point-to-multipoint and point-to-face broadcasting, and the cost of broadcasting information has nothing to do with the number of users. Therefore, as an important part of the information communication industry, digital broadcasting plays an important role in the construction of national information infrastructure and the realization of universal services. [0003] OFDM is a high-speed transmission technology in a wireless environment. Most of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L12/56H04H20/00
CPCH04J2203/0035
Inventor 葛启宏陶涛白栋
Owner TIMI TECH
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