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A robust mobile multimedia broadcast signal framing modulation method

A technology for mobile multimedia and broadcasting signals, applied in multi-frequency code systems, shaping networks in transmitters/receivers, digital transmission systems, etc., can solve problems such as system performance deterioration, signal spectrum changes, and mutual interference

Inactive Publication Date: 2011-12-07
郑新丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 ch

Method used

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  • A robust mobile multimedia broadcast signal framing modulation method
  • A robust mobile multimedia broadcast signal framing modulation method
  • A robust mobile multimedia broadcast signal framing modulation method

Examples

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

[0035] 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 Interleaved coding modulation data block, FFT means fast discrete Fourier transform, FFT concatenation interleaving coding modulation data block length is K; LDPC coding coding rate is 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / One of 8; the bit interleaving adopts random interleaving; the symbol modulation is one of QPSK, 16QAM, 64QAM and 256QAM, and the symbol constellation mappin...

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Abstract

The invention discloses a framing modulating method for a robust mobile multimedia broadcast signal, and the method is a time domain and frequency domain hybrid framing modulating scheme. The framing modulating method for the robust mobile multimedia broadcast signal has the advantages of low peak 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 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 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 郑新丽
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