Wireless multimedia broadcast signal framing modulation method

A multimedia broadcasting and framing modulation technology, applied in the field of wireless communication, can solve problems such as mutual interference, system performance deterioration, and signal distortion

Inactive Publication Date: 2014-04-30
NINGBO UNIV
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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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  • Wireless multimedia broadcast signal framing modulation method
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Embodiment Construction

[0030] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] 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:

[0032] 1) The certain wireless multimedia broadcasting signal transmitter forms an FFT data block with its input data bit stream in the frequency domain, the length of the FFT data block is K, and the value of K is an even number;

[0033] 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 =[d 0 , d 1 ,...,d K-2 , d K-1 ];

[0034] 3) The certain wireless multimedia broadcasting signal transmitter demultiplexes the time domain discrete data sample value block and separates and generates time domain discrete data sample va...

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Abstract

The invention discloses a wireless multimedia broadcast signal framing modulation method and relates to a framing modulation scheme with the time domain and the frequency domain mixed. Through the training sequence optimization design, the signal generating mode and the signal selecting method of the wireless multimedia broadcast signal framing modulation method, original signals of OFDM signals can be obtained easily through processing and restoration at a receiver end, and the wireless multimedia broadcast signal framing modulation method has the advantages of being low in peek-to-average power ratio, short in synchronization time, resistant to channel fading, capable of controlling 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 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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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L1/00
Inventor 郑紫微刘哲何晨晖熊欧吴明昊潘洋
Owner NINGBO UNIV
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