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Robust wireless multi-media radio signal framing modulation method

A multimedia broadcasting and framing modulation technology, which is 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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  • Robust wireless multi-media radio signal framing modulation method
  • Robust wireless multi-media radio signal framing modulation method

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Embodiment Construction

[0030] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] According to an embodiment of a certain transmitter of the robust wireless multimedia broadcasting signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0032] 1) The certain robust wireless multimedia broadcast signal transmitter forms FFT concatenated interleaved coded modulation data in the frequency domain after BCH coding, bit interleaving, LDPC coding, symbol modulation, and symbol interleaving of its input data bit stream 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; bit interleaving adopts random interleaving method ; The symbol modulation is one of QPSK, 16QAM, 32QAM, 64QAM, 64APSK, 256APSK, 1024APSK, the symbol constellation mapping method adopts Gray code mapping; the symbol interleav...

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Abstract

The invention discloses a robust wireless multi-media radio signal framing modulation method which is a framing modulation scheme with the time domain and the frequency domain mixed. According to the robust wireless multi-media radio signal framing modulation method, cascading interleaving coding modulation, training sequence optimization design, a signal generation mode and a signal selection method are adopted, and therefore original signals of OFDM signals can be easily processed, recovered and obtained at a receiver end. The robust wireless multi-media radio signal framing modulation method has the advantages that the peak-to-average power ratio is low, the synchronization time is short, channel fading is resisted, and multiple services can be controlled.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to a robust wireless multimedia 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 modulatio...

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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