Method for framing and modulating wireless multimedia broadcast signals

A multimedia broadcasting and signal technology, applied in the direction of multi-frequency code system, etc., can solve problems such as mutual interference, signal distortion, system performance deterioration, etc.

Inactive Publication Date: 2011-11-16
王奎 +1
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  • Abstract
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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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  • Method for framing and modulating wireless multimedia broadcast signals
  • Method for framing and modulating wireless multimedia broadcast signals
  • Method for framing and modulating wireless multimedia broadcast 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 wireless multimedia broadcasting signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0033] 1) The certain wireless multimedia broadcasting signal transmitter forms an FFT data block with its input data bit stream in the frequency domain, FFT represents fast discrete Fourier transform, and the length of the FFT data block is K;

[0034] 2) The certain wireless multimedia broadcasting signal transmitter adopts IFFT to transform the FFT data block into a time-domain discrete data sample block D total , IFFT stands for Inverse Fast Discrete Fourier Transform;

[0035] 3) The certain wireless multimedia broadcasting signal transmitter divides the time-domain discrete data sample value block into two in order, and the time-do...

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Abstract

The invention discloses a method for framing and modulating wireless multimedia broadcast signals, which is a framing and modulating scheme mixing a time domain with a frequency domain. The method for framing and modulating wireless multimedia broadcast signals has a signal generation mode and a signal selection method which are easy to process and recover an original signal obtaining an OFDM (Orthogonal Frequency Division Multiplexing) signal at a receiver end, and has the advantages of being low in peak average power ratio, short in synchronization time, resistant to channel fading, capableof controlling various businesses, etc.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to a method for framing and modulating wireless multimedia broadcasting signals. 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 wireless multimedia broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile solutions for digital T...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner 王奎
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