Anti-interference wireless signal framing modulation method for single frequency network in multimedia broadcasting

A technology of multimedia broadcasting and wireless signals, 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

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Problems solved by technology

[0014] Aiming at the wireless problem of multi-service digital television multimedia broadcasting single frequency network with high bit interleaving coding modula...

Method used

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  • Anti-interference wireless signal framing modulation method for single frequency network in multimedia broadcasting
  • Anti-interference wireless signal framing modulation method for single frequency network 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 the embodiment of the transmitter of the multimedia broadcast single frequency network anti-interference wireless signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0033] 1) The network data manager of the single frequency network forms the FFT bit-interleaved coded modulation data block in the frequency domain through the multi-code-rate punctured convolutional coding, bit interleaving, and symbol modulation of the input data bit stream, and the FFT bit-interleaved coded modulated data block The length of the block is K, and the value of K is an even number; the encoding rate of multi-rate punctured convolutional encoding for input data is one of 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / 8 ;Bit interleaving adopts random interleaving; symbol modulation is one of QPSK, 16QAM, 32QAM...

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Abstract

The invention discloses an anti-interference wireless signal framing modulation method for a single frequency network in multimedia broadcasting. The anti-interference wireless signal framing modulation method for the single frequency network in multimedia broadcasting is a framing modulation scheme of mixed space domains, time domains and frequency domains, comprises 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 in 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 a method for framing and modulating an anti-jamming wireless signal of a multimedia broadcasting single frequency network. Background technique [0002] Digital TV multimedia broadcasting single frequency network wireless 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 wireless multimedia broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile solutions for digital TV wireless mult...

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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