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Joint coding modulation method and device based on multi-ary coding and high-order modulation

A high-order modulation and joint coding technology, applied in the field of communication, can solve the problems of limited multi-ary coding, increase and decrease application value, etc., and achieve the effect of reducing implementation complexity and wide application range.

Active Publication Date: 2019-01-25
SOUTHEAST UNIV
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  • Claims
  • Application Information

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Problems solved by technology

Due to the lack of analysis of the situation where the high-order modulation order is completely unequal to the multi-ary encoding order, the selection of the multi-ary encoding order is limited in the case of a fixed modulation order.
Especially when the modulation order is high, it is also necessary to select a higher-order multi-ary code, but the decoding complexity of the multi-ary code will continue to increase with the increase of the order, which will reduce its actual application value

Method used

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  • Joint coding modulation method and device based on multi-ary coding and high-order modulation
  • Joint coding modulation method and device based on multi-ary coding and high-order modulation
  • Joint coding modulation method and device based on multi-ary coding and high-order modulation

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example 1

[0101] Example 1) is the present invention's scheme in 2 6 GF(2 4 ) domain, firstly 3×4=2×6, so two 2 6 -QAM modulation symbols and 3 GFs (2 4 ) domain symbols for mixed symbol mapping. In the experiment, the Gray mapping method 2 6 -QAM constellation diagram (such as Figure 5 shown). The upper bound of the theoretical bit error rate is as follows: P e After sorting it is: According to the scheme of the present invention, the available symbol sequence is:

[0102]

[0103] Pass several schemes through the AWGN channel, the channel condition is a single-antenna system, the AWGN channel h, the noise is additive white Gaussian noise, the expectation is 0, and the noise variance is

[0104] from Image 6 It can be seen in that, in ber=10 -4 In the case of GF(2 6 ) to decode the corresponding curve, although the performance is better than that of the GF(2 4 ) decoding is slightly better by about 0.15dB. And, at ber=10 -3 In the case of , the decoding performa...

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Abstract

The invention discloses a joint coding modulation method based on multi-nary coding and high-order modulation and belongs to the technical field of communication. For a joint coding modulation system with a combination between 2p-nary coding and 2q-order modulation (wherein p and q are both integers greater than or equal to 2,), the method selects M 2p coding symbols and N 2q-order modulation symbols and creates a mixed symbol layer mapping relation (represented as an interlacing index sequence) when a constrained relation N*p=M*q is satisfied so that any high-order modulation symbol and any multi-nary coding symbol form coding interlacing association via a multi-symbol mixing mapping. Thus, the implementation complexity and system transmission performance of a communication system are both considered and the bit mapping of a modulation symbol is not required to take account of a Gray mapping rule, thereby achieving a wide application range. The invention further discloses a joint coding modulation device based on multi-nary coding and high-order modulation, a digital signal transmitting device, and a communication system.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a joint coding and modulation method and device based on multi-ary coding and high-order modulation. Background technique [0002] The emergence of multi-ary coding has opened up a new field for the research of binary coding, and its error correction performance is superior to that of binary domain in the case of low code rate. A trend in the development of modern communication systems is that the transmission rate is getting higher and higher. In order to increase the amount of transmitted data, high-dimensional modulation technology is often used. The combination of multi-ary error-correcting codes can effectively enhance the system’s performance while increasing the data transmission rate. The ability to resist burst errors in fading channels reduces the information loss caused by the mutual conversion between bit probability and symbol probability, and obtains ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/0002H04L1/0056H04L1/0071
Inventor 姜明赵春明潘晓青
Owner SOUTHEAST UNIV
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