Robust wireless signal transmission method for digital broadcast
A technology for wireless signals and digital broadcasting, applied in digital transmission systems, transmission systems, electrical components, etc., can solve the problems of signal distortion, sub-channel orthogonality destruction, system performance deterioration, etc., achieving a small amount of information, easy processing and recovery Effect
Inactive Publication Date: 2014-04-30
NINGBO UNIV
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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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[0033] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0034] A schematic diagram of an embodiment of signal transmission between a transmitter and a receiver according to the method for robust transmission of digital broadcast wireless signals proposed by the present invention, as shown in FIG. figure 1 shown, follow these steps:
[0035] 1) The certain digital broadcast wireless signal robust 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;
[0036] 2) The certain digital broadcast wireless signal robust transmitter forms FFT concatenated interleaved coded modulation data in the frequency domain after its input data bit stream undergoes BCH coding, bit interleaving, LDPC coding, symbol modulation, and sy...
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The invention discloses a robust wireless signal transmission method for a digital broadcast, and relates to a mixed framing modulation scheme of the time domain and the frequency domain. According to the training sequence optimization design, the signal generating scheme and the signal selecting method of the robust wireless signal transmission method for the digital broadcast, OFDM signals can be processed and recovered at a receiver end easily to obtain original signals of the OFDM signals. The robust wireless signal transmission method for the digital broadcast has the advantages of being low in peak-to-average power ratio, short in synchronization time, resistant to channel fading, multiple in controllable service and the like.
Description
technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to a method for robust transmission of digital broadcast wireless signals. Background technique [0002] At present, television broadcasting has gradually developed from analog to digital. Digital TV digital broadcasting wireless transmission system, as an important part of digital TV digital broadcasting wireless, the development of its related technologies is closely related to people's quality of life, and therefore has received extensive attention from people. Digital TV, digital broadcasting and wireless related technologies and related industries are industries with rapid development and good market prospects in the field of communication and computer. In terms of related digital TV and digital broadcasting wireless technologies, countries are currently focusing on how to provide low-cost, reliable and high-speed mobile implementation solutions for digita...
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IPC IPC(8): H04L27/26H04L1/00
Inventor 郑紫微刘哲何晨晖熊欧吴明昊潘洋
Owner NINGBO UNIV