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Framing modulation method of anti-fading mobile multimedia broadcasting signals

A mobile multimedia and broadcast signal technology, applied in the field of wireless communication, can solve problems such as signal distortion, sub-channel orthogonality destruction, mutual interference, etc., and achieve the effect of small amount of information and easy processing and recovery

Inactive Publication Date: 2014-05-07
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

Method used

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  • Framing modulation method of anti-fading mobile multimedia broadcasting signals
  • Framing modulation method of anti-fading mobile multimedia broadcasting signals

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Embodiment Construction

[0031] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] According to an embodiment of a certain transmitter of the anti-fading mobile multimedia broadcasting signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0033] 1) The certain anti-fading mobile multimedia broadcast signal transmitter forms an FFT level in the frequency domain after its input data bit stream undergoes RS coding, convolutional interleaving, LDPC coding, symbol modulation, symbol rotation, and symbol interleaving The length of the FFT concatenated interleaving code modulation data block is K; the coding rate of LDPC code is one of 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / 8; The element modulation is one of QPSK, 16QAM, 64QAM and 256QAM, and the symbol constellation mapping method adopts Gray code mapping; the symbol rotation is realized by rotating the symbol constellation by a ce...

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Abstract

The invention discloses a framing modulation method of anti-fading mobile multimedia broadcasting signals. The framing modulation method is a framing modulation scheme with time domains and frequency domains being mixed. By means of the cascading interleaving coded modulation, the training sequence optimization design, the signal generating models and a signal selection method of the framing modulation method of the anti-fading mobile multimedia broadcasting signals, original signals of OFDM signals can be easily obtained at a receiver end through processing and restoring, and the framing modulation method has the advantages of being low in PAPR, short in synchronization time, channel fading resistant, capable of controlling multiple services, and the like.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to an anti-fading mobile multimedia broadcasting signal framing modulation method. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV broadcasting transmission system, as an important part of digital TV broadcasting, the development of its related technologies is closely related to people's quality of life, and therefore has received extensive attention from people. The technology related to digital TV broadcasting 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 broadcasting, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile solutions for digital TV broadcasting in a complex wave propagation environment. The framing mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L1/00
Inventor 郑紫微刘哲何晨晖熊欧吴明昊潘洋
Owner NINGBO UNIV
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