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Anti-fading wireless digital broadcast signal transmission method for single frequency network

A technology for digital broadcasting and signal transmission, applied in the field of wireless communication, which can solve problems such as mutual interference, system performance deterioration, and signal distortion.

Inactive Publication Date: 2014-04-30
NINGBO UNIV
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  • Summary
  • 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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  • Anti-fading wireless digital broadcast signal transmission method for single frequency network
  • Anti-fading wireless digital broadcast signal transmission method for single frequency network

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Embodiment Construction

[0033] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] According to the embodiment of the single frequency network transmitter of the single frequency network anti-fading wireless digital broadcast signal transmission method proposed by the present invention, as figure 1 shown, follow these steps:

[0035] 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;

[0036] 2) The network data manager of the single frequency network forms an FFT concatenated interleaved coded modulation data block in the frequency domain after the input data bit stream undergoes RS coding, convolutional interleaving, LDPC coding, symbol modulation, and symbol interleaving, and ...

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Abstract

The invention discloses an anti-fading wireless digital broadcast signal transmission method for a single frequency network. The method is a spatial domain, time domain and frequency domain combined framing modulation scheme. According to the method, based on training sequence optimization design, signal generation mode selection and signal selection, original signals of OFDM signals can be easily obtained on a receiver side through processing and recovery. The method has the advantages of low peak-to-average power ratio, short synchronization time, anti-channel-fading performance, multi-service controllability and the like.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to a single frequency network anti-fading wireless digital broadcasting signal transmission method. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV anti-fading wireless digital broadcast transmission system, as an important part of digital TV anti-fading wireless digital broadcasting, the development of its related technologies is closely related to people's quality of life, and therefore has received extensive attention. Digital TV anti-fading wireless 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 digital TV anti-fading wireless digital broadcasting technologies, countries are currently focusing on how to provide low-cost, reliable and high-speed m...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L1/00
Inventor 郑紫微刘哲何晨晖熊欧吴明昊潘洋
Owner NINGBO UNIV
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