Interference-resistance framing modulation method for mobile signals of multimedia broadcasting single frequency network

A technology for multimedia broadcasting and mobile signals, applied in multi-frequency code systems, shaping networks in transmitter/receiver, digital transmission systems, etc., and can solve problems such as sub-channel orthogonality destruction, system performance deterioration, and signal distortion.

Inactive Publication Date: 2013-12-11
王金玲
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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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  • Interference-resistance framing modulation method for mobile signals of multimedia broadcasting single frequency network
  • Interference-resistance framing modulation method for mobile signals of multimedia broadcasting single frequency network
  • Interference-resistance framing modulation method for mobile signals of multimedia broadcasting 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 mobile 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-interleaved coded modulation data block in the frequency domain through multi-rate punctured convolutional coding, bit interleaving, symbol modulation and symbol rotation of the input data bit stream, and FFT represents Fast Discrete Fourier Transform, FFT bit interleaving coding, the length of the modulation data block is K; the coding rate of multi-code rate punctured convolutional coding is one of 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / 8 One, the bit interleaving adopts random interleaving, the symbol modulation is...

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Abstract

The invention discloses an interference-resistance framing modulation method for mobile signals of a multimedia broadcasting single frequency network, which is a time domain, frequency domain and space domain hybrid framing modulation scheme. The method has the advantages of low peak-to-average power ratio, short synchronous time, interference resistance, controllability in multiple services and the like.

Description

technical field [0001] The invention belongs to the field of mobile communication, and more specifically relates to a method for framing and modulating an anti-jamming mobile 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 modulat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/03H04L1/00
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner 王金玲
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