A framing modulation method for anti-noise mobile multimedia broadcasting signal

A technology for mobile multimedia and broadcast signals, applied in multi-frequency code systems, shaping networks in transmitters/receivers, digital transmission systems, etc.

Inactive Publication Date: 2011-12-14
杜小春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] Aiming at the problem of anti-noise mobile multimedia broadcasting of high data rate controllable multi-service d

Method used

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  • A framing modulation method for anti-noise mobile multimedia broadcasting signal
  • A framing modulation method for anti-noise mobile multimedia broadcasting signal
  • A framing modulation method for anti-noise mobile multimedia broadcasting signal

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Embodiment Construction

[0033] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] According to an embodiment of a certain transmitter of the anti-noise mobile multimedia broadcasting signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0035] 1) The certain anti-noise mobile multimedia broadcasting signal transmitter forms an FFT encoded data block in the frequency domain after its input data bit stream undergoes LDPC encoding, symbol modulation and symbol rotation. FFT stands for Fast Discrete Fourier Transform, and FFT The length of the encoded data block is K; the encoding rate of LDPC encoding on the input data is one of 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / 8; the symbol modulation is QPSK, 16QAM, 64QAM And one of 256QAM, the symbol constellation mapping method of symbol modulation adopts Gray code mapping; the symbol rotation is realized by rotating the symbol constel...

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Abstract

The invention discloses an anti-noise mobile multimedia broadcast signal framing modulation method, and belongs to a time domain and frequency domain mixed framing modulation scheme. The anti-noise mobile multimedia broadcast signal framing modulation method has the advantages of low peak-to-average power ratio, short synchronous time, noise resistance, controllable multi-service and the like.

Description

technical field [0001] The invention belongs to the field of mobile communication, and more specifically relates to an anti-noise mobile multimedia broadcasting signal framing modulation method. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV mobile multimedia broadcasting transmission system, as an important part of digital TV mobile 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 mobile 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 anti-noise mobile multimedia broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile implementation soluti...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L25/03H04L1/00
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner 杜小春
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