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Anti-fading framing modulating method for multimedia broadcast radio signal

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

Active Publication Date: 2011-11-23
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

Method used

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  • Anti-fading framing modulating method for multimedia broadcast radio signal
  • Anti-fading framing modulating method for multimedia broadcast radio signal
  • Anti-fading framing modulating method for multimedia broadcast radio signal

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Embodiment Construction

[0032] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] According to an embodiment of a certain transmitter of the multimedia broadcast wireless signal anti-fading framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0034] 1) The certain multimedia broadcast wireless signal anti-fading transmitter passes its input data bit stream through RS coding (Reed-Solomon, RS), convolutional interleaving, LDPC coding (Low Density Parity Check, LDPC), symbol modulation, After symbol interleaving, an FFT concatenated interleaving 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 / One of 2, 5 / 8, 3 / 4, and 7 / 8; the symbol modulation is one of QPSK, 16QAM, 32QAM, and 64QAM, and the ...

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Abstract

The invention discloses an anti-fading framing modulating method for a multimedia broadcast radio signal, and is a time-domain and frequency-domain hybrid framing modulating scheme and has the advantages of low PAPR (Peak to Average Power Ratio), short synchronous time, anti-fading property, capability of controlling multi-service, and the like.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to an anti-fading framing modulation method for multimedia broadcast wireless signals. Background technique [0002] Digital TV multimedia broadcasting wireless related technologies and related industries are industries with rapid development and good market prospects in the field of communication and computer. Multimedia broadcast wireless signal anti-fading transmitter framing modulation technology is the key technology of digital TV multimedia broadcast wireless system, which plays a decisive role in the performance of the entire 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 advanta...

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Application Information

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