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

A multimedia broadcasting and framing modulation technology, applied in the direction of multi-frequency code system, etc., can solve the problems of 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: 2014-04-30
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 wireless multi-media radio signal framing modulation method
  • Anti-fading wireless multi-media 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 wireless multimedia broadcasting signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0035] 1) The certain anti-fading wireless multimedia broadcasting signal transmitter forms FFT concatenated interleaving code modulation in the frequency domain after its input data bit stream undergoes RS coding, convolutional interleaving, LDPC coding, symbol modulation, and symbol interleaving Data block, FFT concatenated interleaving coding modulation data block length is K; LDPC coding rate is one of 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / 8; symbol modulation is QPSK , 16QAM, 32QAM, 64QAM, 64APSK, 256APSK, 1024APSK, the symbol constellation mapping method adopts Gray code mapping; the symbol interleaving adopts random interleaving met...

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Abstract

The invention discloses an anti-fading wireless multi-media 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 wireless multi-media 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, in particular to an anti-fading wireless 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 modulation techn...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 郑紫微刘哲何晨晖熊欧吴明昊潘洋
Owner NINGBO UNIV
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