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A kind of framing modulation method of multimedia wireless broadcasting signal

A wireless broadcasting and multimedia technology, applied in multi-frequency code systems, shaping networks in transmitters/receivers, digital transmission systems, etc., can solve problems such as sub-channel orthogonality destruction, signal distortion, and signal spectrum changes

Inactive Publication Date: 2011-11-30
刘福敏 +1
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  • Abstract
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  • Claims
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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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  • A kind of framing modulation method of multimedia wireless broadcasting signal
  • A kind of framing modulation method of multimedia wireless broadcasting signal
  • A kind of framing modulation method of multimedia wireless 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 wireless broadcast signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0035] 1) The certain multimedia wireless broadcasting signal transmitter forms an FFT encoded data block in the frequency domain by serially cascading multi-code rate punctured convolution encoding of its own input data bit stream, FFT stands for Fast Discrete Fourier Transform, and FFT encoding The length of the data block is K; the serial concatenated multi-rate punctured convolutional coding is formed by two convolutional codes through random interleaving serial concatenated puncture, and the serial concatenated multi-rate punctured convolutional coding One of the encoding rates 1 / 4, 4 / 9, 3 / 8, 7 / 16 and 5 / 9;

[0036] 2) The certain multi...

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Abstract

The invention discloses a method for modulating framing of multimedia wireless broadcast signals, and relates to a time domain / frequency domain mixed framing modulating method. The method for modulating framing of multimedia wireless broadcast signals has the advantages of low peak-to-average power ratio, short synchronization time, resistance to fading and noise, controllable multiple services 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 a multimedia wireless broadcast signal. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. 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 multimedia wireless broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile solutions for digital TV ...

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 刘福敏
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