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Method for framing and modulating anti-interference wireless multimedia broadcast signals in single frequency network

A multimedia broadcasting and framing modulation technology, applied in the direction of multi-frequency code system, etc., can solve the problems of sub-channel orthogonality destruction, signal distortion, signal spectrum change, etc.

Inactive Publication Date: 2014-04-30
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

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  • Method for framing and modulating anti-interference wireless multimedia broadcast signals in single frequency network
  • Method for framing and modulating anti-interference wireless multimedia broadcast signals in single frequency network

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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 the embodiment of the single frequency network transmitter of the single frequency network anti-jamming wireless multimedia broadcasting signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0032] 1) The network data manager of the single frequency network forms the FFT bit-interleaved coded modulation data block in the frequency domain through the multi-code-rate punctured convolutional coding, bit interleaving, and symbol modulation of the input data bit stream, and the FFT bit-interleaved coded modulated data block The length of the block is K, and the value of K is an even number; the coding rate of the multi-code rate punctured convolutional coding is one of 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / 8, and the bit interleaving adopts Random interleaving mode, symbol modulation is...

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Abstract

The invention discloses a method for framing and modulating anti-interference wireless multimedia broadcast signals in a single frequency network. The method provides a framing and modulating scheme mixing a space domain, a time domain and a frequency domain. According to a training sequence optimal design, a signal generation pattern and a signal selection method of the method for framing and modulating the anti-interference wireless multimedia broadcast signals in the single frequency network, an original signal of an OFDM signal can be easily obtained through processing and recovery on a receiver terminal. The method for framing and modulating the anti-interference wireless multimedia broadcast signals in the single frequency network has the advantages that the peak-to-average power ratio is low, synchronization time is short, channel fading is prevented, 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 single frequency network anti-jamming wireless multimedia broadcasting signal framing modulation method. 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 m...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 郑紫微刘哲何晨晖熊欧吴明昊潘洋
Owner NINGBO UNIV
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