Single-frequency network mobile digital broadcasting signal transmission method

A technology for moving digital and broadcasting signals, applied in the field of wireless communication, which can solve problems such as system performance deterioration, sub-channel orthogonality destruction, signal spectrum change, etc.

Inactive Publication Date: 2014-05-07
NINGBO UNIV
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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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  • Single-frequency network mobile digital broadcasting signal transmission method

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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] According to the embodiment of the single frequency network transmitter of the single frequency network mobile digital broadcast signal transmission method proposed by the present invention, as figure 1 shown, follow these steps:

[0034] 1) The central data manager of the single frequency network converts the multimedia data stream into a bit stream through 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 network data manager of the single frequency network forms an FFT data block on the frequency domain through the symbol modulation and symbol rotation of the input data bit stream, the length of the FFT data block is K, and the value of K takes an even number; the symbol modulation is One of QPSK,...

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Abstract

The invention discloses a single-frequency network mobile digital broadcasting signal transmission method which is a framing modulation scheme with the space domain, the time domain and the frequency domain mixed. According to the single-frequency network mobile digital broadcasting signal transmission method, through training sequence optimization design, signal generation modes and a signal selecting method, original signals of OFDM signals can be obtained easily at the receiver end through processing and restoring, and the method has the advantages of low peak-to-average power ratio, short synchronization time, channel fading resistance and multi-service controllability.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to a single frequency network mobile digital broadcasting signal transmission method. 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 technologies is closely related to people's quality of life, and therefore has received extensive attention from people. Digital TV, mobile digital 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 mobile digital broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile implementation solutions for digital ...

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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