Anti-interference wireless multimedia mobile broadcast signal framing modulation method

A multimedia broadcasting and anti-noise technology, applied in the field of wireless communication

Inactive Publication Date: 2012-01-04
王丽艳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] Aiming at the problem of high data rate controllable multi-service digital TV anti-noise wireless multimedia broadc

Method used

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  • Anti-interference wireless multimedia mobile broadcast signal framing modulation method
  • Anti-interference wireless multimedia mobile broadcast signal framing modulation method
  • Anti-interference wireless multimedia mobile broadcast signal framing modulation method

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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 an embodiment of a certain transmitter of the anti-noise wireless multimedia broadcasting signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0035] 1) This certain anti-noise wireless multimedia broadcasting signal transmitter forms the FFT coded data block on the frequency domain with its input data bit stream through LDPC code, and FFT represents fast discrete Fourier transform, and the length of FFT coded data block is K; The encoding rate of input data for LDPC encoding is one of 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / 8;

[0036] 2) The certain anti-noise wireless multimedia broadcasting signal transmitter uses IFFT to transform the FFT coded data block into a time-domain discrete coded data sample block D total , IFFT stands for Inverse Fast Discrete Fourier Transform;

[...

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Abstract

The invention discloses an anti-interference wireless multimedia mobile broadcast signal framing modulation method, which is a time domain/frequency domain combined framing modulation scheme. The anti-interference wireless multimedia mobile broadcast signal framing modulation method has the advantages of low peak-to-average power ratio, short synchronization time, resistance to the influence of noises, multi-service controllability and the like.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to an anti-noise wireless multimedia broadcasting signal framing modulation method. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV wireless multimedia broadcasting transmission system, as an important part of digital TV wireless multimedia 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 multimedia 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-noise wireless multimedia broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile implement...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L25/02H04L1/00
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner 王丽艳
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