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Broadband broadcasting transmission method and system

A technology of broadcasting transmission and broadcasting transmitter, which is applied in the field of communication, can solve the problems of people being unable to tune radio station signals, unable to receive radio station signals, etc., and achieve the effects of low equipment cost and maintenance cost, and simplified structure.

Active Publication Date: 2016-05-25
WUHAN UNIV
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AI Technical Summary

Problems solved by technology

In the disaster prevention stage or after the disaster, the radio is an important means for the public to obtain notification information, but on the one hand, in an emergency, the public may not be able to tune to the radio station signal due to panic, on the other hand, the location of the disaster victims may have been shielded by electromagnetic waves environment, unable to receive radio station signals

Method used

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  • Broadband broadcasting transmission method and system
  • Broadband broadcasting transmission method and system
  • Broadband broadcasting transmission method and system

Examples

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing, take the FM broadcast of 88Mhz-108Mhz as an example, illustrate the specific implementation method of the present invention.

[0029] figure 2 Is the overall structure diagram of the present embodiment, and 1 is the digital processing part, which is completed by the computer running GNURadio.

[0030] 2 is the radio frequency part, image 3 is the specific composition of the radio frequency part 2.

[0031] In this example, GNURadio is used as the digital processing platform to realize the processing of the digital part; ARM core CPU (LPC1850), high-speed DAC (MAX5184), oscillator and mixer (RFFC5072) are used as the RF hardware platform, and 2sc3355 and 2sc1970 are used together as the RF power amplifier.

[0032] GNURadio is an open source SDR design platform, which has a graphical programming tool grc, which can realize fast modular SDR. In order to realize the digital processing part of the present invention, it i...

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Abstract

The invention provides a broadband broadcasting transmission method and system. A software defined radio (SDR) technology is utilized, a structure of a transmitter is largely simplified, complex multi-frequency modulation is implemented in an SDR manner, only one transmitter (for reducing device performance requirements, two or four transmitters can also be utilized) is needed to complete the whole coverage of FM broadcasting with the 20 Mhz bandwidth, and any one normally operating radio can receive signals transmitted by the transmitter without tuning as long as the radio is turned on. Furthermore, the device costs and the maintenance costs are low, the broadband broadcasting transmission method and system can be widely applied to information transmission of an electromagnetic shielding space, and have promotion and application values on the aspects of disaster prevention and reduction. The same method can also be applied to AM broadcasting, even digital broadcasting.

Description

technical field [0001] The invention belongs to the communication field, and relates to a broadband broadcasting method, which can be used in occasions such as emergency disaster relief broadcasting, and is specifically a broadband broadcasting transmitting method and system. Background technique [0002] Since the advent of broadcast technology, after years of development and improvement, it has become an important media means, playing an important role in information dissemination, entertainment, message delivery, public opinion guidance and other aspects. The radio receiving device is simple in principle, low in cost, and easy to guarantee the effect. Therefore, until today when the Internet is highly developed, its ownership rate is still quite high, and it has even become a necessary configuration on cars and mobile phones. [0003] Common broadcast transmitters, based on AM (Amplitude Modulation) or FM (Frequency Modulation) technology, modulate audio signals onto fixe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/00
CPCH04B1/0007H04B1/0017
Inventor 张涛
Owner WUHAN UNIV
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