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A robust multimedia mobile broadcast signal framing modulation method

A mobile broadcasting and multimedia technology, applied in multi-frequency code systems, shaping networks in transmitters/receivers, digital transmission systems, etc., and can solve problems such as sub-channel orthogonality destruction, system performance deterioration, and signal distortion.

Inactive Publication Date: 2011-12-21
任桂文
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  • Abstract
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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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  • A robust multimedia mobile broadcast signal framing modulation method
  • A robust multimedia mobile broadcast signal framing modulation method
  • A robust multimedia mobile broadcast 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 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 Form FFT cascaded interleaving coded modulation data blocks on the domain, FFT means fast discrete Fourier transform, the length of FFT concatenated interleaved coded modulated data blocks is K; the coding rate of multi-code rate punctured convolutional codes is 1 / 4, 1 / One of 2, 5 / 8, 3 / 4 and 7 / 8; bit interleaving adopts random interleavin...

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Abstract

The invention discloses a robust multi-media mobile broadcast signal framing modulation method which is a framing modulation scheme of mixing a time domain and a frequency domain. According to the robust multi-media mobile broadcast signal framing modulation method disclosed by the invention, a low-complexity peak-to-average power ratio reduction technology and a combined code modulation technology are designed aiming at the technical problems of high signal peak-to-average power ratio, channel time variant, Doppler frequency shift and noise of a broadband multi-carrier multi-media mobile broadcast system, which need to be solved, and therefore the broadband multi-carrier multi-media mobile broadcast system has the advantages of low peak-to-average power ratio, short synchronization time,robustness, controllable multi-service, and the like.

Description

technical field [0001] The invention belongs to the field of mobile 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 te...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L25/03H04L1/00
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner 任桂文
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