Movable signal anti-interference framing modulation method in multimedia broadcasting

A technology of multimedia broadcasting and mobile signals, applied in the direction of multi-frequency code system, etc., to achieve the effect of small amount of information and easy processing and recovery

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

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Problems solved by technology

[0015] Aiming at the problem of high data rate controllable multi-service digital TV anti-jamming wireless multimedia br

Method used

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

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

[0033] 1) The anti-jamming transmitter for a certain multimedia broadcasting mobile signal forms an FFT bit interleaving code in the frequency domain after undergoing multi-rate punctured convolutional coding, bit interleaving, symbol modulation and symbol rotation on its input data bit stream Modulation data block, FFT bit interleaving coding modulation data block length is K; the coding rate of multi-code rate punctured convolution coding for input data is 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / One of 8, the bit interleaving adopts random interleaving, the symbol modulation is one of QPSK, 16QAM, 64QAM and 256QAM, and the symbol constella...

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Abstract

The invention discloses a movable signal anti-interference framing modulation method in multimedia broadcasting. The movable signal anti-interference framing modulation method in multimedia broadcasting is a framing modulation scheme of mixed time domains and frequency domains, comprises a bit interweaving coding modulation 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-interference framing modulation method for multimedia broadcast mobile signals. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV broadcasting transmission system, as an important part of digital TV broadcasting, the development of its related technologies is closely related to people's quality of life, and therefore has received extensive attention from people. The technology related to digital TV broadcasting 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 broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile solutions for digital TV broadcasting in a complex wave propagation environment. The fr...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 郑紫微刘哲何晨晖熊欧吴明昊潘洋
Owner NINGBO UNIV
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