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Multimedia broadcast mobile signal robust framing modulation method

A technology for multimedia broadcasting and mobile signals, 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, signal distortion, and signal spectrum changes.

Active Publication Date: 2013-07-24
ANHUI SAFE ELECTRONICS
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Problems solved by technology

[0003] 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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  • Multimedia broadcast mobile signal robust framing modulation method

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Embodiment Construction

[0031] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] According to an embodiment of a certain transmitter of the multimedia broadcasting mobile signal robust framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0033] 1) The robust transmitter of a certain multimedia broadcast mobile signal passes its input data bit stream through BCH coding (Bose Chaudhuri Hocquenghem, BCH), bit interleaving, LDPC coding (Low Density Parity Check, LDPC), symbol modulation and code After element rotation and symbol interleaving, an FFT concatenated interleaved coded modulation data block is formed in the frequency domain. FFT means fast discrete Fourier transform, and the length of the FFT concatenated interleaved coded modulated data block is K; the coding rate of LDPC code is 1 / 4 , 1 / 2, 5 / 8, 3 / 4, and 7 / 8; bit interleaving adopts random interleaving; symbo...

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Abstract

The invention discloses a multimedia broadcast mobile signal robust framing modulation method, and belongs to a time domain and frequency domain mixed framing modulation scheme. The multimedia broadcast mobile signal robust framing modulation method has the advantages of low peak-to-average power ratio, short synchronous 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 framing modulation method for multimedia broadcast mobile signals. Background technique [0002] Digital TV, multimedia broadcasting, mobile-related technology and related industries are industries with rapid development and good market prospects in the field of communication and computer. Multimedia broadcasting mobile signal robust transmitter framing modulation technology is the key technology of digital TV multimedia broadcasting mobile system, which plays a decisive role in the performance of the whole system, and is the focus of everyone's research. Due to the rapid development of digital signal processing technology and integrated circuit technology, the system realization of Orthogonal Frequency Division Multiplexing (OFDM) technology becomes easier and easier. Because OFDM multi-carrier transmission technology has many advantages such as simp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/03H04L1/00
Inventor 郑紫微徐铁峰聂秋华何加铭
Owner ANHUI SAFE ELECTRONICS
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