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Anti-noise mobile signal transmission method for digital broadcast

A mobile signal and digital broadcasting technology, applied in digital transmission systems, transmission systems, electrical components, etc., can solve problems such as sub-channel orthogonality destruction, signal distortion, and signal spectrum changes

Inactive Publication Date: 2014-04-30
NINGBO UNIV
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  • Abstract
  • Description
  • 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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  • Anti-noise mobile signal transmission method for digital broadcast
  • Anti-noise mobile signal transmission method for digital broadcast

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Embodiment Construction

[0032] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] A schematic diagram of an embodiment of signal transmission between a certain transmitter and a receiver of a digital broadcast mobile signal anti-noise transmission method proposed in the present invention, as shown in FIG. figure 1 shown, follow these steps:

[0034] 1) The digital broadcast mobile signal anti-noise transmitter converts the multimedia data stream into a bit stream through a media data processor, and uses the scrambling code sequence generated by the feedback shift register to perform scrambling processing to form an input data bit stream;

[0035] 2) The digital broadcast mobile signal anti-noise transmitter forms an FFT coded data block in the frequency domain after its input data bit stream undergoes LDPC encoding, symbol modulation and symbol rotation. LDPC means low-density parity check, The length of the FFT enc...

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Abstract

The invention discloses an anti-noise mobile signal transmission method for a digital broadcast, 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 anti-noise mobile signal transmission method for the digital broadcast, OFDM signals can be processed and recovered at a receiver end easily to obtain original signals of the OFDM signals. The anti-noise mobile signal transmission method for the digital broadcast 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 anti-noise transmission of digital broadcast mobile signals. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV digital broadcasting wireless transmission system, as an important part of digital TV digital broadcasting wireless, 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, digital broadcasting and 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 related digital TV and digital broadcasting wireless technologies, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile implementation solutions for digi...

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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