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Anti-fading multi-media mobile radio signal framing modulation method

A mobile broadcasting and framing modulation technology, applied in the field of wireless communication, can solve problems such as signal distortion, sub-channel orthogonality destruction, system performance deterioration, etc., and achieve the effect of small amount of information and easy processing and recovery

Inactive Publication Date: 2014-04-30
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

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  • Anti-fading multi-media mobile radio signal framing modulation method
  • Anti-fading multi-media mobile radio signal framing modulation method

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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-fading multimedia mobile broadcast signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0035] 1) The certain anti-fading multimedia mobile broadcast signal transmitter passes its input data bit stream through RS coding, convolutional interleaving, multi-rate punctured convolutional coding, symbol modulation, symbol rotation, and symbol interleaving, then In the frequency domain, an FFT concatenated interleaved coded modulation data block is formed, and the length of the FFT concatenated interleaved coded modulated data block is K; the coding rates of the multi-code rate punctured convolutional code are 1 / 4, 1 / 2, 5 / 8, One of 3 / 4 and 7 / 8; the symbol modulation is one of QPSK, 16QAM, 64QAM and 256QAM, and the symbol con...

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Abstract

The invention discloses an anti-fading multi-media mobile radio signal framing modulation method and relates to a hybrid framing modulation scheme of the time domain and the frequency domain. Due to the cascade interleaved coded modulation, the training sequence optimization design, the signal generating scheme and the signal selection method of the anti-fading multi-media mobile radio signal framing modulation method, OFDM signals can be processed and recovered at a receiver end easily to obtain original signals of the OFDM signals, and the method has the advantages of being low in peak average power rate, short in synchronization time, resistant to channel fading, multiple in controllable service and the like.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to an anti-fading multimedia mobile broadcast 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 modul...

Claims

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Application Information

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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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