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High-order modulation method, de-mapping method and corresponding apparatus

A high-order modulation and quadrature amplitude modulation technology, applied in the field of communication, can solve the problem of low accuracy rate of symbol data decision, and achieve the effect of improving the accuracy rate of decision

Active Publication Date: 2014-01-15
HUAWEI TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existing technology achieves a compromise design between spectral efficiency and implementation complexity to a certain extent
However, when the mapping method in the prior art is used for demodulation of high-order modulation, since the judgment of important bits is only judged by the minimum judgment criterion of Euclidean distance, the correct rate of judgment of symbol data is not high.

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  • High-order modulation method, de-mapping method and corresponding apparatus
  • High-order modulation method, de-mapping method and corresponding apparatus
  • High-order modulation method, de-mapping method and corresponding apparatus

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Embodiment 1

[0047] The embodiment of the present invention provides a high-order modulation method, such as figure 1 As shown, the method includes:

[0048] Step 101: converting the information to be transmitted into bit data, and demultiplexing the bit data into more than one way of bit data;

[0049] Step 102: Perform quadrature amplitude modulation on more than one channel of bit data to generate symbol data, and output the generated symbol data;

[0050] Among them, the order of quadrature amplitude modulation is not less than 64; in the process of mapping bit data into symbol data in quadrature amplitude modulation, the bit data is divided into three parts,

[0051] The first part of bit data is used for mapping to constellation points, and the constellation points are divided into disjoint subsets of constellation points, which are called large regions;

[0052] The second part of bit data is used to map to the constellation points, and divide the constellation point subsets in ea...

Embodiment 2

[0067] The embodiment of the present invention provides a high-order modulation method, such as Figure 10 As shown, if the input bit data includes: bit data after the first type of encoding, bit data after the second type of encoding, and unencoded bit data, the method specifically includes:

[0068] Step 201: converting the information to be transmitted into bit data, and demultiplexing the bit data into more than one way of bit data;

[0069] Step 202: performing first-type encoding on at least one path of bit data in the more than one path of bit data;

[0070] Step 203: performing second-type encoding on at least one path of bit data in the more than one path of bit data;

[0071] Step 204: Perform quadrature amplitude modulation on the more than one channel of bit data to generate symbol data, and output the generated symbol data;

[0072] Wherein, the order of the quadrature amplitude modulation is not lower than 64; the bit data is divided into three parts during the...

Embodiment 3

[0087] An embodiment of the present invention provides a demapping method, such as Figure 12 As shown, the method includes:

[0088] Step 301: Perform demodulation and judgment on the input symbols, and obtain a subset of judgments;

[0089] Step 302: Determine the large area where the input symbol is located; wherein, the large area is a subset that divides the constellation points into disjoint constellation points;

[0090] Step 303: According to the minimum distance demodulation criterion, obtain the decision subset, and determine the large area where the input symbol is located, and determine the bit data mapped from the input symbol.

[0091] Wherein, the minimum distance demodulation criterion mentioned in step 303 means that the constellation point with the closest Euclidean distance between the received symbol in the decision region and the constellation point in the decision region is the final decision symbol. That is, in the large area where the input symbol is ...

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Abstract

Embodiments of the invention disclose a high-order modulation method, a de-mapping method and a corresponding apparatus. In the embodiments of the invention, through distinguishing important bits and according to a complexity of a decision area, the important bit used for distinguishing a large area and the important bit used for distinguishing a small area are distinguished. Therefore, a decision correct rate of a demodulator can be further increased.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a high-order modulation method, a demapping method and a corresponding device. Background technique [0002] As the communication system's requirements for transmission rate and spectrum efficiency continue to increase, the communication system will adopt a higher-order quadrature amplitude modulation (QAM, Quadrature Amplitude Modulation) mode to meet the requirements for transmission rate and spectrum efficiency. How to effectively map the bit information to be transmitted into high-order modulation constellation points to ensure spectral efficiency and meet the basic requirements of the system for bit error rate (or frame error rate) is an important issue facing the industry. [0003] The academic community has proposed a solution for multi-layer coding and modulation on this topic, that is, after demultiplexing the transmitted bit stream, it is divided into par...

Claims

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Application Information

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IPC IPC(8): H04L27/34H04L1/00
CPCH04L27/3488H04L1/0086H04L1/007H04L27/365H04L27/38
Inventor 曾雁星王光健刘坤鹏
Owner HUAWEI TECH CO LTD
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