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Wireless multimedia broadcast signal framing modulation method for single frequency network

A technology of multimedia broadcasting and single frequency network, applied in the direction of multi-frequency code system, etc., can solve the problems of system performance deterioration, sub-channel orthogonality destruction, signal spectrum change, etc.

Inactive Publication Date: 2013-09-25
广德睿纳鲜果酒业有限公司
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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

Method used

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  • Wireless multimedia broadcast signal framing modulation method for single frequency network
  • Wireless multimedia broadcast signal framing modulation method for single frequency network
  • Wireless multimedia broadcast signal framing modulation method for single frequency network

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Embodiment Construction

[0032] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] According to the embodiment of the single frequency network transmitter of the single frequency network wireless multimedia broadcasting signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0034] 1) The network data manager of the single frequency network forms an FFT data block on the frequency domain with the input data bit stream, and FFT represents fast discrete Fourier transform, and the length of the FFT data block is K;

[0035] 2) The network data manager of the single frequency network uses a space frequency encoder with a code rate of 1 to modulate the FFT data block formed in the frequency domain to each wireless multimedia broadcasting signal transmitter branch in the single frequency network to form space frequency modulation FFT data blocks, and adjust the time sync...

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Abstract

The invention discloses a wireless multimedia broadcast signal framing modulation method for a single frequency network, which is a time domain / frequency domain / space domain hybrid framing modulation scheme. The wireless multimedia broadcast signal framing modulation method for the single frequency network has the advantages of low peak-to-average power ratio, short synchronization time, anti-channel interference performance, multi-service controllability and the like.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to a single frequency network wireless multimedia broadcasting signal framing modulation method. Background technique [0002] 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 wireless multimedia broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile solutions for digital TV wireless multimedia broadcasting in a complex wave propagation envi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner 广德睿纳鲜果酒业有限公司
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