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Anti-fading framing modulation method for wireless signals of multimedia broadcast

A technology for multimedia broadcasting and wireless signals, applied in the field of wireless communication, can solve the problems of signal odd change, sub-channel orthogonality destruction, system performance deterioration, etc., to achieve the effect of small amount of information, easy processing and recovery

Inactive Publication Date: 2014-04-30
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 strange changes in the signal and cause the signal spectrum to change. changes, resulting in the destruction of the orthogonality between the sub-channels, resulting in mutual interference and deteriorating system performance

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  • Anti-fading framing modulation method for wireless signals of multimedia broadcast
  • Anti-fading framing modulation method for wireless signals of multimedia broadcast

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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 broadcast wireless signal anti-fading framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0033] 1) The anti-fading transmitter of a certain multimedia broadcasting wireless signal forms an FFT concatenated interleaving coded modulation in the frequency domain after its input data bit stream undergoes RS coding, convolutional interleaving, LDPC coding, symbol modulation, and symbol interleaving Data block, RS means Reed-Solomon, LDPC means Low Density Parity Check, FFT concatenated interleaving code modulation data block length is K; LDPC coding rate is 1 / 4, 1 / 2, 5 / 8, 3 / 4 and one of 7 / 8; the bit interleaving adopts random interleaving; the symbol modulation is one of QPSK, 16QAM, 32QAM, 64QAM, 64APSK, 256APSK, and 102...

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Abstract

The invention discloses an anti-fading framing modulation method for wireless signals of a multimedia broadcast, and relates to a mixed framing modulation scheme of the time domain and the frequency domain. According to the cascade interleaved coded modulation, the training sequence optimization design, the signal generating scheme and the signal selecting method of the anti-fading framing modulation method for the wireless signals of the multimedia broadcast, OFDM signals can be processed and recovered at a receiver end easily to obtain original signals of the OFDM signals. The anti-fading framing modulation method for the wireless signals of the multimedia 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 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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
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