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Wireless signal anti-noise framing modulation method in multimedia broadcasting

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

Inactive Publication Date: 2014-05-07
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Aiming at the problem of high data rate controllable multi-service digital TV anti-noise wireless multimedia broadcasting, the present invention proposes a multimedia broadcast wireless signal anti-noise framing modulation method

Method used

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  • Wireless signal anti-noise framing modulation method in multimedia broadcasting
  • Wireless signal anti-noise framing modulation method in multimedia broadcasting

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

[0036] 1) The certain multimedia broadcast wireless signal anti-noise transmitter encodes its input data bit stream in the frequency domain through LDPC to form an FFT coded data block. LDPC represents low-density parity check, and the length of the FFT coded data block is K. The value of K takes an even number;

[0037] 2) The certain multimedia broadcast wireless signal anti-noise transmitter uses IFFT to transform the FFT coded data block into a time-domain discrete coded data sample block D total =[d 0 , d 1 ,...,d K-2 , d K-1 ];

[0038] 3) The certain multimedia broadcast wireless signal anti-noise transmitter sequenti...

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Abstract

The invention discloses a wireless signal anti-noise framing modulation method in multimedia broadcasting. The wireless signal anti-noise framing modulation method in multimedia broadcasting is a framing modulation scheme of mixed time domains and frequency domains, comprises a coding mode, a training sequence optimized design, a signal generation mode and a signal selection method, obtains original signals of OFDM signals easily at a receiver end through processing and recovery, and has the advantages of being low peak-to-average power ratio, short in synchronization time, resistant to channel fading, controllable in multiple service and the like.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to an anti-noise framing modulation method of a multimedia broadcast wireless signal. 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 impleme...

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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