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A kind of framing modulation method of multimedia broadcast wireless signal

A technology for multimedia broadcasting and wireless signals, 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: 2011-12-28
马丽
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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 broadcast wireless signal
  • A kind of framing modulation method of multimedia broadcast wireless signal
  • A kind of framing modulation method of multimedia broadcast wireless signal

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

[0033] 1) The certain multimedia broadcast wireless 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 multimedia broadcast wireless 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 multimedia broadcast wireless signal transmitter divides the time-domain discrete data sample value block into two equally in order, and the time-domain...

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Abstract

The invention discloses a framing and modulation method for a wireless signal of multimedia broadcast, wherein the disclosed method is a framing and modulation scheme mixing a time domain and a frequency domain. According to the framing and modulation method for the wireless signal of the multimedia broadcast, the method comprises the following advantages: low peak-to-average power ratio; short synchronization time; anti-channel fading performance; and controllable and multi-service property 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 multimedia broadcast wireless signals. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV multimedia broadcasting wireless 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 multimedia broadcasting wireless related technologies and related industries are industries with rapid development and good market prospects in the field of communication and computer. In terms of digital TV multimedia broadcasting wireless related technologies, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile implementation solutions for ...

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 马丽
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