Method for transmitting robust digital radio broadcast signal
A digital wireless broadcasting and signal transmission technology, applied in digital transmission systems, transmission systems, shaping networks in transmitters/receivers, etc., can solve problems such as mutual interference, signal distortion, and system performance deterioration
Inactive Publication Date: 2013-08-21
梅爱雪
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[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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[0035] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0036] A schematic diagram of an embodiment of signal transmission between a certain transmitter and a receiver according to the robust digital wireless broadcast signal transmission method proposed by the present invention, as shown in figure 1 shown, follow these steps:
[0037] 1) The certain robust digital wireless broadcast signal transmitter converts the multimedia data stream into a bit stream through a media data processor, and uses the scrambling code sequence generated by the feedback shift register to perform scrambling processing to form an input data bit stream;
[0038] 2) The certain robust digital wireless broadcast signal transmitter forms FFT in the frequency domain after BCH encoding, bit interleaving, multi-rate punctured convolutional coding, symbol modulation, and symbol interleaving of its input data bit stream Concaten...
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The invention discloses a method for transmitting a robust digital radio broadcast signal, which relates to a time domain and frequency domain hybrid transmission scheme. In the method for transmitting the robust digital radio broadcast signal, a low-complexity lowered peak to average power ratio technology, a cascade interweave-coding modulation technology and a signal frame time-frequency domain joint iteration detached processing technology are designed specific to technical problems needing to be solved such as signal high peak to average power ratio, channel variation and Doppler frequency shift existing in a broadband multi-carrier digital wireless broadcast transmission system, so that the broadband multi-carrier digital wireless broadcast transmission system has the advantages of low peak to average power ratio, short synchronization time, robustness, multi-service controllability and the like.
Description
technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to a robust digital wireless broadcast signal transmission 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. Transmission technology is the...
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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 梅爱雪