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

A technology of digital broadcasting and signal transmission, applied in the field of wireless communication

Inactive Publication Date: 2014-03-26
刘亚军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] Aiming at the problem of high coded data rate controllable multi-service digital TV single frequency network anti-noise wireless digital broadcasting problem, the present invention proposes a single frequency network anti-noise wireless digital broadcasting signal transmission method

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  • Anti-noise wireless digital broadcast signal transmission method for single frequency network
  • Anti-noise wireless digital broadcast signal transmission method for single frequency network
  • Anti-noise wireless digital broadcast signal transmission method for 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 anti-noise wireless digital broadcasting 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 coded data block in the frequency domain through LDPC encoding of the input data bit stream, FFT represents fast discret...

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Abstract

The invention discloses an anti-noise wireless digital broadcast signal transmission method for a single frequency network, and belongs to a time domain, frequency domain and space domain mixed transmission scheme. The anti-noise wireless digital broadcast signal transmission method for the single frequency network has the advantages of low peak-to-average power ratio, short synchronous time, channel fading resistance, controllable multi-service 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-noise wireless digital broadcasting signal transmission method. Background technique [0002] Because OFDM multi-carrier transmission technology has many advantages such as simple structure, high spectrum utilization rate, and anti-frequency selectivity and channel time variation, it has attracted much attention and has been deeply researched and applied in Xdsl, broadband mobile communication, broadband wireless local area network, It is widely used in many fields such as digital TV wireless digital broadcasting. 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 ort...

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 刘亚军
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