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A digital broadcast single frequency network anti-noise wireless signal transmission method

A digital broadcasting and wireless signal technology, applied in the field of wireless communication, can solve problems such as sub-channel orthogonality destruction, signal distortion, signal spectrum change, etc.

Inactive Publication Date: 2011-11-30
TONGLING ZHAOLIN IND & TRADE CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

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

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Embodiment Construction

[0031] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] According to the embodiment schematic diagram of the signal transmission between the transmitter and the receiver of the digital broadcast single frequency network anti-noise wireless signal transmission method proposed by the present invention, as figure 1 shown, follow these steps:

[0033] 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;

[0034] 2) The network data manager of the single frequency network encodes the input data bit stream through LDPC to form an FFT coded data block in the frequency domain, FFT means fast discrete Fourier transform, and the length of the FFT coded data block i...

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Abstract

The invention discloses an anti-noise wireless signal transmission method for a digital broadcast single-frequency network. The method is a time domain / frequency domain / space domain combined transmission scheme. The anti-noise wireless signal transmission method has the advantages of low peak-to-average power ratio, short synchronization time, anti-noise 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 digital broadcast single frequency network anti-noise wireless signal transmission method. Background technique [0002] Digital broadcast anti-noise wireless signal transmitter transmission technology is the key technology of digital TV wireless digital broadcasting system, which plays a decisive role in the performance of the whole system and is the object of everyone's key research. Orthogonal Frequency Division Multiplexing (OFDM) multi-carrier transmission technology has many advantages such as simple structure, high spectrum utilization, and resistance to frequency selectivity and channel time variation, so it has attracted everyone's attention and has been deeply researched and used in Xdsl, Broadband mobile communication, broadband wireless local area network, digital TV wireless digital broadcasting and many other fields are widely used. The high ...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L25/03H04L1/00
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner TONGLING ZHAOLIN IND & TRADE CO LTD
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