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

A technology of multimedia broadcasting and framing modulation, which is used in multi-frequency code systems and other directions

Inactive Publication Date: 2011-11-16
NINGBO UNIV
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Problems solved by technology

[0010] Aiming at the problem of high data rate controllable multi-service digital television single frequency network anti-interference wireless multimedia broadcasting, the present invention proposes a single frequency network anti-interference wireless multimedia broadcasting signal framing modulation method

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

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Embodiment Construction

[0028] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] 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:

[0030] 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 ...

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Abstract

The invention discloses an anti-interference wireless multimedia broadcast signal framing modulation method for a single frequency network, which is a time domain / frequency domain / space domain hybrid framing modulation scheme. The anti-interference wireless multimedia broadcast signal framing modulation method for the single frequency network has the advantages of low peak-to-average power ratio, short synchronization time, anti-channel 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 single frequency network anti-jamming wireless multimedia broadcasting signal framing modulation method. Background technique [0002] Because OFDM multi-carrier transmission technology has many advantages such as simple structure, high spectrum utilization rate, and anti-frequency selectivity and channel time variation, it has attracted much attention and has been deeply researched and applied in Xdsl, broadband mobile communication, broadband wireless local area network, It is widely used in many fields such as digital TV wireless multimedia broadcasting. 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. Therefore, it is necessary to consider how to reduce the occurrence probability of large peak power signals in OFDM signals and reduce nonlinearity. Solut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner NINGBO UNIV
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