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Multimedia broadcast wireless signal single-frequency network anti-noise transmission method

A multimedia broadcasting, wireless signal technology, applied in multi-frequency code systems, digital video signal modification, image communication, etc., can solve the problems of algorithms and encoders that are too computationally expensive, cannot be practically applied, and are not widely used.

Inactive Publication Date: 2010-07-14
NINGBO UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When LDPC coding was first discovered, it was not widely used in most cases due to the computational complexity of algorithms and encoders being too large for practical application.

Method used

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  • Multimedia broadcast wireless signal single-frequency network anti-noise transmission method
  • Multimedia broadcast wireless signal single-frequency network anti-noise transmission method
  • Multimedia broadcast wireless signal single-frequency network anti-noise transmission method

Examples

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Embodiment Construction

[0044] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0045] According to the embodiment of the signal transmission between the transmitter and the receiver of the multimedia broadcasting wireless signal single frequency network anti-noise transmission method proposed by the present invention, as figure 1 As shown, each multimedia broadcast wireless transmitter in the single frequency network sends the multimedia broadcast wireless signal to the air wireless channel through the following steps, and the signal sent by each multimedia broadcast wireless transmitter in the single frequency network is received and processed by the receiver:

[0046] 1) The central data manager of the single frequency network converts the multimedia data stream into a data bit stream through the media data processor;

[0047] 2) The network data manager of the single frequency network passes the input data bit stream ...

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Abstract

The invention discloses a multimedia broadcast wireless signal single-frequency network anti-noise transmission method. In the multimedia broadcast wireless signal single-frequency network anti-noise transmission method of the invention, after processing of multimedia data stream by a central data manager on a single-frequency network multimedia broadcast wireless transmitter, network data manager bit stream LDPC coding, code element modulation, constellation rotation, empty frequency code modulation, frame body formation, time domain training sequence insertion framing, pulse shaping, and up-conversion to carrier waves, multimedia broadcast wireless signals form radio-frequency signals which are transmitted to an air wireless channel and received by a receiver terminal for processing signals transmitted by each multimedia broadcast wireless transmitter in a single-frequency network. The multimedia broadcast wireless signal single-frequency network anti-noise transmission method has the advantages of short receiving synchronization time, high transmission efficiency, controllable multiple services and the like.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to an anti-noise transmission method of a multimedia broadcast wireless signal single frequency network. Background technique [0002] At present, wireless TV broadcasting has gradually developed from analog to digital. Digital TV broadcast wireless transmission system, as an important part of digital TV broadcast wireless, the development of its related technologies is closely related to people's quality of life, and therefore has received extensive attention from people. Digital TV broadcasting wireless related technologies and related industries are industries with rapid development and good market prospects in the field of communication and computer. In terms of digital TV broadcasting wireless related technologies, the current focus of countries is how to provide low-cost, reliable and high-speed mobile implementation solutions for digital TV broadcasting ...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L1/06H04N7/26H04N19/117H04N19/157H04N19/80
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner NINGBO UNIV
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