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Framing modulation method for multimedia wireless broadcast signals

A wireless broadcasting and framing modulation technology, applied in the field of wireless communication, can solve problems such as system performance deterioration, sub-channel orthogonality destruction, and signal spectrum changes

Inactive Publication Date: 2014-04-30
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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  • Framing modulation method for multimedia wireless broadcast signals
  • Framing modulation method for multimedia wireless broadcast signals

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

[0032] 1) The certain multimedia wireless broadcast signal transmitter forms an FFT coded data block in the frequency domain through serial concatenated multi-code rate punctured convolution coding of its own input data bit stream, and the length of the FFT coded data block is K, The value of K takes an even number; the serial concatenated multi-rate punctured convolutional coding is formed by two convolutional codes through random interleaving serial concatenated puncturing, and the serial concatenated multi-rate punctured convolutional coding code The rate is one of 1 / 4, 4 / 9, 3 / 8, 7 / 16 and 5 / 9;

[0033] 2) The certain multimedia wireless ...

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Abstract

The invention discloses a framing modulation method for multimedia wireless broadcast signals, and relates to a mixed framing modulation scheme of the time domain and the frequency domain. According to the training sequence optimization design, the signal generating scheme and the signal selecting method of the framing modulation method for the multimedia wireless broadcast signals, OFDM signals can be processed and recovered at a receiver end easily to obtain original signals of the OFDM signals. The framing modulation method for the multimedia wireless broadcast signals has the advantages of being low in peak-to-average power ratio, short in synchronization time, resistant to channel fading, multiple in controllable service 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 multimedia wireless broadcasting transmission system, as an important part of digital TV multimedia wireless 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 wireless 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): H04L27/26H04L1/00
Inventor 郑紫微刘哲何晨晖熊欧吴明昊潘洋
Owner NINGBO UNIV
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