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Framing modulation method for robust multi-media mobile broadcast signals

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

Method used

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

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

[0035] 1) The certain robust multimedia mobile broadcasting signal transmitter passes its input data bit stream through BCH coding, bit interleaving, multi-code rate punctured convolutional coding, symbol modulation and symbol rotation, and symbol interleaving, and then transmits the data in frequency The FFT concatenated interleaving coded modulation data block is formed on the domain, and the length of the FFT concatenated interleaved coded modulated data block is K; One of / 4 and 7 / 8; bit interleaving adopts random interleaving; symbol modulation is one of QPSK, 16QAM, 64QAM and 256QAM, and the symbol constellation mapping method of ...

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Abstract

The invention discloses a framing modulation method for robust multi-media mobile 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 multi-media mobile 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 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 modulation ...

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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