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Single-frequency-network wireless digital broadcast signal transmitting method

A technology of digital broadcasting and signal transmission, applied in the field of wireless communication, which can solve problems such as mutual interference, system performance deterioration, sub-channel orthogonality destruction, etc.

Inactive Publication Date: 2014-05-14
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

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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 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 data block on the frequency domain with the input data bit stream, and the length of the FFT data block is K, and the value of K is an even number;

[0037] 3) The network data manager of the single frequency network uses a space ...

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Abstract

The invention discloses a single-frequency-network wireless digital broadcast signal transmitting method which is a framing and modulating scheme where the space domain, the time domain and the frequency domain are mixed. Original signals of OFDM signals can be easily obtained by conducting processing and recovering at the receiver end through the training sequence optimizing design, the signal generation mode and the signal selection method of the single-frequency-network wireless digital broadcast signal transmitting method. The single-frequency-network wireless digital broadcast signal transmitting method has the advantages of being low in peak-to-average power ratio, short in synchronization time, capable of resisting channel fading, capable of controlling multiple services, 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 wireless digital broadcasting signal transmission method. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV wireless digital broadcasting transmission system, as an important part of digital TV wireless 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 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 related technologies of digital TV wireless digital broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile implementation solutions for...

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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