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Robust method for framing and modulating wireless multimedia broadcast signal

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

Inactive Publication Date: 2011-11-23
王甲斌
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  • Description
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Problems solved by technology

[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

Method used

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  • Robust method for framing and modulating wireless multimedia broadcast signal
  • Robust method for framing and modulating wireless multimedia broadcast signal
  • Robust method for framing and modulating wireless multimedia broadcast signal

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Embodiment Construction

[0033] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] According to an embodiment of a certain transmitter of the robust wireless multimedia broadcasting signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:

[0035] 1) The certain robust wireless multimedia broadcast signal transmitter forms FFT concatenated interleaved coded modulation data in the frequency domain after BCH coding, bit interleaving, LDPC coding, symbol modulation, and symbol interleaving of its input data bit stream block, FFT means Fast Discrete Fourier Transform, the length of FFT concatenated interleaved coding modulation data block is K; the coding rate of LDPC coding is one of 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / 8 ; Bit interleaving adopts random interleaving; symbol modulation is one of QPSK, 16QAM, 32QAM and 64QAM, symbol constellation mapping adopts Gray code mapping; sym...

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Abstract

The invention discloses a robust method for framing and modulating a wireless multimedia broadcast signal, which is a framing and modulation proposal of time domain and frequency domain mixing. The robust method for framing and modulating a wireless multimedia broadcast signal disclosed by the invention has the advantages of low peak-to-average power ratio, short synchronization time, robustness,controllable multi-service etc.

Description

technical field [0001] The invention belongs to the field of wireless communication, and more specifically relates to a robust wireless multimedia broadcast signal framing modulation 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. The framing modulatio...

Claims

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Application Information

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