Constellation mapping and demapping method for dvb-s2 coded modulation system

A DVB-S2 and constellation mapping technology, applied in the field of digital information transmission, can solve problems such as poor results, and achieve the effects of wide application scenarios, increased degrees of freedom, and reduced Shaping loss

Inactive Publication Date: 2011-12-14
TSINGHUA UNIV
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Problems solved by technology

The DVB-S2 standard coding and modulation scheme is mainly oriented to the independent demapping technology. Although the coding and modulation scheme can also take into account iterative demapping, the effect is not good and needs to be optimized and improved.

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  • Constellation mapping and demapping method for dvb-s2 coded modulation system
  • Constellation mapping and demapping method for dvb-s2 coded modulation system
  • Constellation mapping and demapping method for dvb-s2 coded modulation system

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Embodiment Construction

[0040] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] Such as image 3 As shown, constellation mapping and corresponding demapping method for DVB-S2 coded modulation system described in the present invention comprise the following steps:

[0042] A: The transmitter encodes and interleaves the input information to obtain the bit data of the required code length;

[0043] This step further includes:

[0044] The input information is encoded and interleaved according to the encoding method and the interleaver specified in the DVB-S2 standard, and the encoded and interleaved bit data is obtained.

[0045] B: Using a Gaussian-like input constellation mapping method and / or a high-dimensional constellation mapping method t...

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Abstract

The invention discloses a digital video broadcasting-satellite second generation (DVB-S2) code modulation system-oriented constellation mapping and demapping method, and relates to the technical field of digital information transmission. The method comprises the following steps of: A, coding and interleaving input information at a transmitting end to acquire bit data with required code length; B, performing constellation mapping on the bit data in a Gaussian-like input constellation mapping mode and/or a high-dimensional constellation mapping mode to acquire an output symbol; and C, performing iterative demapping and decoding on the received symbol by an iterative demapping method at a receiving end. By the method, shaping loss can be obviously reduced, higher system gain can be achieved by slightly increasing the complexity of the mapping mode, system performance is improved, and wide application prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a constellation mapping and demapping method for a DVB-S2 coded modulation system. Background technique [0002] DVB-S2 (Digital Video Broadcasting-Satellite-Second Generation) is the main satellite digital TV broadcasting standard in Europe today. [0003] The constellation diagrams used in this standard mainly include QPSK (Quadrature Phase Shift Keying), 8PSK (Phase Shift Keying), 16APSK (Amplitude Phase Shift Keying) and 32APSK schemes. Among them, both QPSK and 8PSK use Gray (Gray) mapping. The QPSK constellation diagram and the constellation point mapping method are as follows: figure 1 As shown, the 8PSK constellation diagram and the constellation point mapping method are as follows figure 2 shown. In addition, for 8PSK, 16APSK and 32APSK schemes, the standard also uses bit interleaving technology. [0004] At the transmitting end, for the low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 彭克武张奔林俊豪阳辉潘长勇
Owner TSINGHUA UNIV
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