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Single-frequency network anti-interference wireless digital broadcasting signal transmission method

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

Inactive Publication Date: 2014-05-07
NINGBO UNIV
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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 anti-jamming 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 the FFT bit-interleaved coded modulation data block in the frequency domain through the multi-code rate punctured convolutional coding, bit interleaving, and symbol modulation of the input data bit stream, and the FFT bit-int...

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Abstract

The invention discloses a single-frequency network anti-interference wireless digital broadcasting signal transmission method which is a framing modulation scheme with the space domain, the time domain and the frequency domain mixed. According to the single-frequency network anti-interference wireless digital broadcasting signal transmission method, through training sequence optimization design, signal generation modes and a signal selecting method, original signals of OFDM signals can be obtained easily at the receiver end through processing and restoring, and the method has the advantages of low peak-to-average power ratio, short synchronization time, channel fading resistance and multi-service controllability.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to a single frequency network anti-jamming wireless digital broadcasting signal transmission method. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV anti-jamming wireless digital broadcast transmission system, as an important part of digital TV anti-jamming 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-jamming 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 technologies related to digital TV anti-jamming wireless digital broadcasting, countries are currently focusing on how to provide low-cost, reliable ...

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Application Information

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Patent Type & Authority Applications(China)
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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