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Anti-interference radio signal framing modulation method for multimedia broadcast single-frequency network

A multimedia broadcasting and wireless signal 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: 2013-06-12
广西良将自动化工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The high peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (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 changes the signal spectrum, destroys the orthogonality between sub-channels, generates mutual interference, and deteriorates system performance. It is necessary to consider how to reduce the occurrence probability of large peak power signals in OFDM signals and reduce non- Solutions for Linear Distortion Effects

Method used

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  • Anti-interference radio signal framing modulation method for multimedia broadcast single-frequency network
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  • Anti-interference radio signal framing modulation method for multimedia broadcast single-frequency network

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Embodiment Construction

[0029] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] According to the embodiment of the single frequency network transmitter of the multimedia broadcast single frequency network anti-jamming wireless signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0031] 1) The network data manager of the single frequency network forms an FFT bit interleaving coded modulation data block in the frequency domain through multi-rate punctured convolution coding, bit interleaving, and symbol modulation of the input data bit stream, and FFT stands for Fast Discrete Fourier Transform , the length of the FFT bit-interleaved coding modulation data block is K; 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 Random interleaving is adopted, the symbol modulation is one of ...

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Abstract

The invention discloses an anti-interference radio signal framing modulation method for a multimedia broadcast single-frequency network. The method is a time domain / frequency domain / space domain hybrid framing modulation scheme. The anti-interference radio signal framing modulation method for the multimedia broadcast single-frequency network has the advantages of low peak to average power ratio, short synchronization time, anti-interference performance, multi-service controllability 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 an anti-jamming wireless signal of a multimedia broadcasting single frequency network. Background technique [0002] The high peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (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 changes the signal spectrum, destroys the orthogonality between sub-channels, generates mutual interference, and deteriorates system performance. It is necessary to consider how to reduce the occurrence probability of large peak power signals in OFDM signals and reduce non- Solutions for linear distortion effects. BICM technology (Bit Interleaved Coded Modulation, BICM) uses a bit interleaver and makes the coding and mod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner 广西良将自动化工程有限公司
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