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Mobile digital broadcasting signal transmission method

A broadcast signal and mobile digital technology, applied in the field of mobile digital broadcast signal transmission, can solve the problems of sub-channel orthogonality destruction, system performance deterioration, signal distortion, etc.

Inactive Publication Date: 2014-05-07
NINGBO UNIV
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  • 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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  • Mobile digital broadcasting signal transmission method
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Embodiment Construction

[0032] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] A schematic diagram of an embodiment of signal transmission between a transmitter and a receiver of the mobile digital broadcast signal transmission method proposed by the present invention, such as figure 1 As shown, proceed as follows:

[0034] 1) The certain mobile digital broadcast signal transmitter converts the multimedia data stream into a bit stream by the 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 certain mobile digital broadcast signal transmitter forms an FPT data block in the frequency domain after symbol modulation and symbol rotation of its input data bit stream. The length of the FFT data block is K, and the value of K is an even number; Symbol modulation is one of QPSK, 16QAM, 64QAM and...

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Abstract

The invention discloses a mobile digital broadcasting signal transmission method, and provides a framing modulation scheme in the mode that a time domain and a frequency domain are mixed. According to a training sequence optimization design method and a signal generating pattern and signal selecting method of the mobile digital broadcasting signal transmission method, original signals of OFDM signals can be easily processed, restored and acquired at a receiver end. The mobile digital broadcasting signal transmission method has the advantages that the peak-to-average power ratio is low, synchronization time is short, channel fading can be resisted, and multiple services can be controlled.

Description

Technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to a method for transmitting a mobile digital broadcast signal. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV mobile digital broadcasting transmission system, as an important part of digital TV mobile digital broadcasting, the development of its related technology is closely related to people's quality of life, and therefore has attracted special attention. Digital TV mobile digital broadcasting-related technologies and related industries are industries that develop rapidly in the field of communications and computers and have good market prospects. With regard to digital TV mobile digital broadcasting-related technologies, the current focus of various countries is how to provide low-cost, reliable and high-speed mobile implementation solutions for digital TV mobile digital broadcasting i...

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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