Method for transmitting mobile digital broadcast signals of single-frequency network

A mobile digital and broadcast signal technology, applied in the field of mobile communication, can solve problems such as mutual interference, signal distortion, and system performance deterioration

Inactive Publication Date: 2013-10-30
王德均
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The high peak-to-average power ratio (PAPR) of OFDM signals has high requirements on the linear range of amplifiers and digital-to-analog converters. If the linear range of the system cannot meet the signal changes, it will cause signal distortion and signal spectrum changes. , resulting in the destruction of the orthogonality between the sub-channels, resulting in mutual interference and deteriorating system performance

Method used

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  • Method for transmitting mobile digital broadcast signals of single-frequency network
  • Method for transmitting mobile digital broadcast signals of single-frequency network
  • Method for transmitting mobile digital broadcast signals of single-frequency network

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Embodiment Construction

[0034] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] According to the embodiment of the signal transmission between the transmitter and the receiver of the single frequency network mobile digital broadcast signal transmission method proposed by the present invention (assuming that there are N transmitters in the single frequency network), as figure 1 shown, follow these steps:

[0036] 1) The central data manager of the single frequency network converts the multimedia data stream into a bit stream through the media data processor, and uses the scrambling code sequence generated by the feedback shift register to perform scrambling processing to form an input data bit stream;

[0037] 2) The network data manager of the single frequency network forms an FFT data block in the frequency domain through the symbol modulation and symbol rotation of the input data bit stream, FFT means fast discre...

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Abstract

The invention discloses a method for transmitting mobile digital broadcast signals of a single-frequency network, and relates to a time domain / frequency domain / air space mixed framing modulating scheme. The method for transmitting mobile digital broadcast signals of the single-frequency network has the advantages of low peak-to-average power ratio, short synchronization time, resistance to channel fading, controllable multiple services and the like.

Description

technical field [0001] The invention belongs to the field of mobile communication, and more specifically relates to a single frequency network mobile digital broadcasting signal transmission method. Background technique [0002] Digital TV mobile digital broadcasting transmission system, as an important part of digital TV mobile digital broadcasting, 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, mobile digital broadcasting related technologies and related industries are industries with rapid development and good market prospects in the field of communication and computer. In terms of technologies related to digital TV mobile digital broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile implementation solutions for digital TV mobile digital broadcasting in a complex wave propagation environment. The transmis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/03H04L1/00
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner 王德均
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