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An anti-fading multimedia wireless broadcast signal framing modulation method

A wireless broadcasting and multimedia technology, applied in multi-frequency code system, shaping network in transmitter/receiver, digital transmission system, etc., can solve problems such as sub-channel orthogonality destruction, system performance deterioration, signal distortion, etc.

Inactive Publication Date: 2011-12-07
NINGBO UNIV
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  • Abstract
  • Description
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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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  • An anti-fading multimedia wireless broadcast signal framing modulation method
  • An anti-fading multimedia wireless broadcast signal framing modulation method
  • An anti-fading multimedia wireless broadcast signal framing modulation method

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

[0035] 1) The certain anti-fading multimedia wireless broadcast signal transmitter forms its input data bit stream in the frequency domain after RS ​​coding, convolutional interleaving, multi-rate punctured convolutional coding, symbol modulation, and symbol interleaving FFT concatenated interleaved coding modulation data block, FFT means fast discrete Fourier transform, the length of FFT concatenated interleaving coding modulation data block is K; the coding rate of multi-code rate punctured convolutional coding is 1 / 4, 1 / 2, 5 One of / 8, 3 / 4 and 7 / 8; the symbol modulation is one of QPSK, 16QAM, 32QAM and 64QAM, the symbol conste...

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Abstract

The invention discloses an anti-fading multimedia wireless broadcast signal framing modulation method, which is a framing modulation scheme of mixing time domain and frequency domain. The anti-fading multimedia wireless broadcast signal framing modulation method of the invention has the advantages of low peak-to-average power ratio, short synchronization time, anti-fading, controllable multi-service and the like.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to an anti-fading 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 mod...

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 NINGBO UNIV
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