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Anti-interference framing and modulating method for multimedia wireless radio signals

A technology of wireless broadcasting and framing modulation, applied in multi-frequency code systems and other directions, it can solve the problems of sub-channel orthogonality destruction, signal distortion, system performance deterioration, etc., and achieve the effect of easy processing and recovery and small amount of information.

Inactive Publication Date: 2014-04-30
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The high peak-to-average power ratio (PAPR) of OFDM signals has high requirements on the linear range of amplifiers and digital-to-analog converters. If the linear range of the system cannot meet the signal changes, it will cause signal distortion and signal spectrum changes. , resulting in the destruction of the orthogonality between the sub-channels, resulting in mutual interference and deteriorating system performance

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  • Anti-interference framing and modulating method for multimedia wireless radio signals
  • Anti-interference framing and modulating method for multimedia wireless radio signals

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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 anti-jamming multimedia wireless broadcast signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0033] 1) The certain anti-jamming multimedia wireless broadcasting signal transmitter passes its input data bit stream through RS encoding, convolutional interleaving, serial concatenated multi-code rate punctured convolutional encoding, symbol modulation, and symbol interleaving in the In the frequency domain, an FFT concatenated interleaved coded modulation data block is formed, RS represents Reed-Solomon, and the length of the FFT concatenated interleaved coded modulated data block is K; the serial concatenated multi-code rate punctured convolutional coding for the input data is performed by Two convolutional codes are punct...

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Abstract

The invention discloses an anti-interference framing and modulating method for multimedia wireless radio signals and relates to a framing modulation scheme for mixing a time domain and a frequency domain. The anti-interference framing and modulating method for the multimedia wireless radio signals comprises the steps of cascade-interleaved coded modulation, training sequence optimization design, signal generation pattern selection and signal selection. In this way, original signals of OFDM signals can be easily obtained through processing and restoring at a receiver end. Besides, the anti-interference framing and modulating method for the multimedia wireless radio signals has the advantages that the peak-to-average power ratio is low, synchronization time is short, channel fading is resisted, and multiple services can be controlled.

Description

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

Claims

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Application Information

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