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Framing modulation method for robust mobile multi-media broadcast 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: 2014-04-30
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

Method used

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  • Framing modulation method for robust mobile multi-media broadcast signals
  • Framing modulation method for robust mobile multi-media broadcast signals

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

[0032] 1) The certain robust mobile multimedia broadcasting signal transmitter forms an FFT cascade in the frequency domain after its input data bit stream undergoes BCH encoding, bit interleaving, LDPC encoding, symbol modulation, symbol rotation, and symbol interleaving Interleave coded modulation data block, the length of FFT concatenated interleaved coded modulation data block is K; LDPC coded coding rate is one of 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / 8; bit interleaved Random interleaving is adopted; the symbol modulation is one of QPSK, 16QAM, 64QAM and 256QAM; the symbol rotation is realized by rotating the symbol constellation diagram by...

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Abstract

The invention discloses a framing modulation method for robust mobile multi-media broadcast signals. The method is a framing modulation scheme with time domain and frequency domain mixed. According to the framing modulation method for the robust mobile multi-media broadcast signals, cascade interleaving code modulation is performed, training sequence optimization design is performed, signal generating modes are implemented, and a signal selecting method is implemented, so that original signals of OFDM signals are easy to obtain through processing and recovering at a receiver terminal, and the framing modulation method has the advantages of being low in peak-to-average power ratio, short in synchronization time and resistant to channel fading and providing multiple controllable services.

Description

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

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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