Movable signal anti-noise framing modulation method in multimedia broadcasting

A technology for multimedia broadcasting and mobile signals, applied in the field of wireless communication, to achieve the effect of reducing the peak-to-average power ratio and reducing the amount of information

Inactive Publication Date: 2014-05-07
NINGBO UNIV
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  • 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 broadcasting, the present invention proposes a multimedia broadcasting mobile signal anti-noise framing modulation method

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

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

[0035] 1) The certain multimedia broadcast mobile signal anti-noise transmitter forms an FFT coded data block in the frequency domain after its input data bit stream undergoes LDPC encoding, symbol modulation and symbol rotation. LDPC means low-density parity check, The length of the FFT encoded data block is K, and the value of K is an even number; the symbol modulation is one of QPSK, 16QAM, 64QAM and 256QAM, and the symbol constellation mapping method of the symbol modulation adopts Gray code mapping; the symbol rotation passes The rotation angle of the symbol constellation diagram is realized by rotating a certain angle. The...

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Abstract

The invention discloses a movable signal anti-noise framing modulation method in multimedia broadcasting. The movable signal anti-noise framing modulation method in multimedia broadcasting is a framing modulation scheme of mixed time domains and frequency domains, comprises a coding method, 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 for multimedia broadcast mobile signals. 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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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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