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A kind of framing modulation method of multimedia mobile broadcasting signal

A mobile broadcasting and multimedia technology, applied in multi-frequency code systems, shaping networks in transmitters/receivers, digital transmission systems, etc., can solve problems such as system performance deterioration, signal spectrum changes, and mutual interference

Inactive Publication Date: 2011-12-14
董海玲
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

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

Method used

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  • A kind of framing modulation method of multimedia mobile broadcasting signal
  • A kind of framing modulation method of multimedia mobile broadcasting signal
  • A kind of framing modulation method of multimedia mobile broadcasting signal

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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 an embodiment of a certain transmitter of the multimedia mobile broadcast signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0035] 1) The certain multimedia mobile broadcast signal transmitter forms an FFT coded data block in the frequency domain through serial concatenated multi-rate punctured convolution coding, symbol modulation and symbol rotation on its input data bit stream, and the FFT Indicates the fast discrete Fourier transform, and the length of the FFT coded data block is K; the serial concatenated multi-rate punctured convolutional code is formed by two convolutional codes through random interleaving and serial concatenated puncture, and the serial concatenated multiple The coding rate of the code rate punctured convolutional coding is one of 1 / 4, 4 / 9,...

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Abstract

The invention discloses a multimedia mobile broadcast signal framing modulation method and in particular relates to a framing modulation scheme with mixing of time domains and frequency domains. The multimedia mobile broadcast signal framing modulation method has the advantages that the peak-average power ratio is low, the synchronization time is short, the fading noise influence is avoided, and the multiple services can be controlled and the like.

Description

technical field [0001] The invention belongs to the field of mobile communication, and more specifically relates to a method for framing and modulating a multimedia mobile broadcast signal. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV mobile multimedia broadcasting transmission system, as an important part of digital TV mobile 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 mobile 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 multimedia mobile broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile implementation solutions for digital ...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L25/03H04L1/00
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner 董海玲
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